HighHOST-OS-001Patch and Vulnerability ManagementServer

Operating System Past End of Security Support

Checks whether the Linux distribution release still receives free security updates.

Why It Matters: Once a release reaches end of life, newly discovered vulnerabilities are never fixed. Every later CVE in the kernel, OpenSSL or the web server stays open forever.
How It Detects: Reads ID and VERSION_ID from /etc/os-release and looks them up in a dated table of free vendor security-support dates, including Debian LTS (table date 2026-10-13). Releases older than the oldest table row for their distribution fail. Releases within 90 days of end of life also fail, so there is time to plan the upgrade.
How to Fix: Plan an upgrade to a supported release (for example do-release-upgrade on Ubuntu, or a fresh install and migration). Paid extended support (Ubuntu Pro, RHEL ELS) is an alternative while migrating.
How to Verify: cat /etc/os-release and compare with the vendor lifecycle page.
CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Control Category: Patch and Vulnerability Management: CIS Controls v8 7, 2; NIST CSF 2.0 ID.RA, PR.PS
Fix Effort: High
CIS Controls v8 Safeguard: 2.2
NIST CSF 2.0 Subcategory: ID.RA-01, PR.PS-02
CWE: CWE-1104
OWASP Top 10: A06:2021
NIST SP 800-53 Rev. 5: SA-22, SI-2
Benchmark Topic: Supported operating system versions (topic only, no benchmark text)
References: Ubuntu release cycle
Debian releases and LTS
Red Hat Enterprise Linux life cycle
endoflife.date (community-maintained lifecycle data)

Learn the theory behind this check: F3 Vulnerabilities, CVE, CWE and CVSS, P1 Linux Server Hardening.

Source Code

The complete file that defines this check. Run it with openvapt scan --only HOST-OS-001, or read it offline with openvapt explain HOST-OS-001.

internal/checks/host/os_patch.go · Lines 1-221View on GitHub at This Commit

1package host
2
3import (
"context"
"fmt"
"regexp"
"strconv"
"strings"
"time"
10
"github.com/openvapt/openvapt/internal/check"
"github.com/openvapt/openvapt/internal/checks/collect"
"github.com/openvapt/openvapt/internal/sys"
14)
15
16// eol maps "ID VERSION_ID" to the date standard (free) security support ends.
17// Sources: each vendor's published lifecycle page, cited in the check refs.
18// The table is dated; a release newer than this table may be missing, while a
19// release older than the oldest row of its distribution is always past end of
20// support and fails. Every row was re-verified on 2026-10-13 against the
21// vendors' published schedules (Canonical, Debian, Red Hat, CentOS, Rocky,
22// AlmaLinux, Oracle, Fedora, Amazon) as collected by endoflife.date, with the
23// Fedora 44 date from Fedora's own schedule (fedorapeople.org f-44 key
24// tasks). Fedora dates are provisional until the release two versions later
25// ships; re-check them when the table is next refreshed.
26var eol = map[string]string{
"ubuntu 16.04": "2021-04-02", "ubuntu 18.04": "2023-05-31", "ubuntu 20.04": "2025-05-31",
"ubuntu 20.10": "2021-07-22", "ubuntu 21.04": "2022-01-20", "ubuntu 21.10": "2022-07-14",
"ubuntu 22.04": "2027-06-01", "ubuntu 22.10": "2023-07-20", "ubuntu 23.04": "2024-01-20",
"ubuntu 23.10": "2024-07-12", "ubuntu 24.04": "2029-05-31", "ubuntu 24.10": "2025-07-10",
"ubuntu 25.04": "2026-01-17", "ubuntu 25.10": "2026-07-01", "ubuntu 26.04": "2031-05-31",
"debian 9": "2022-06-30", "debian 10": "2024-06-30", "debian 11": "2026-08-31", "debian 12": "2028-06-30", "debian 13": "2030-06-30",
// CentOS Linux 7 and 8; CentOS Stream 9 reports ID centos as well.
"centos 7": "2024-06-30", "centos 8": "2021-12-31", "centos 9": "2027-05-31", "centos 10": "2030-05-31",
"rhel 7": "2024-06-30", "rhel 8": "2029-05-31", "rhel 9": "2032-05-31", "rhel 10": "2035-05-31",
"rocky 8": "2029-05-31", "rocky 9": "2032-05-31", "rocky 10": "2035-05-31",
"almalinux 8": "2029-05-31", "almalinux 9": "2032-05-31", "almalinux 10": "2035-05-31",
"ol 7": "2024-12-31", "ol 8": "2029-07-31", "ol 9": "2032-06-30", "ol 10": "2035-06-30",
"fedora 39": "2024-11-26", "fedora 40": "2025-05-13", "fedora 41": "2025-12-15", "fedora 42": "2026-05-27",
"fedora 43": "2026-12-09", "fedora 44": "2027-06-02",
"amzn 2018.03": "2023-12-31", "amzn 2": "2026-06-30", "amzn 2023": "2029-06-30",
42}
43
44// EOLTableDate is printed in reports so readers know how fresh the table is.
45const EOLTableDate = "2026-10-13"
46
47// eolWarnDays is how close to end of support a release starts to fail, so
48// there is time to plan the upgrade.
49const eolWarnDays = 90
50
51// majorOnly lists distributions whose support depends on the major version.
52var majorOnly = map[string]bool{"centos": true, "rhel": true, "rocky": true, "almalinux": true, "ol": true, "debian": true}
53
54// osEOL looks up one release. It returns the end date, whether the release
55// is past (or within eolWarnDays of) end of support, and whether the result
56// is known. A release older than every row for its distribution is reported
57// as past end of support without a date.
58func osEOL(id, ver string, now time.Time) (end string, bad, known bool, daysLeft int) {
if majorOnly[id] {
ver = strings.SplitN(ver, ".", 2)[0]
}
if e, ok := eol[id+" "+ver]; ok {
d, err := time.Parse("2006-01-02", e)
if err != nil {
	return "", false, false, 0
}
left := d.Sub(now)
return e, left < eolWarnDays*24*time.Hour, true, int(left.Hours() / 24)
}
// Amazon Linux 1 used year.month versions; 2018.03 was the last, so any
// earlier one (2017.09, 2016.09, ...) is past end of support. Comparing
// against the oldest row would fail here, because "2" sorts before them.
if id == "amzn" && amznYear.MatchString(ver) && versionLess(ver, "2018.03") {
return "", true, true, 0
}
oldest := ""
for k := range eol {
if rid, rv, _ := strings.Cut(k, " "); rid == id && (oldest == "" || versionLess(rv, oldest)) {
	oldest = rv
}
}
if oldest != "" && ver != "" && versionLess(ver, oldest) {
return "", true, true, 0
}
return "", false, false, 0
86}
87
88var amznYear = regexp.MustCompile(`^20[01][0-9]\.[0-9]{2}$`)
89
90// versionLess compares dotted numeric versions ("16.04" < "18.04", "9" < "10").
91// A non-numeric component makes the comparison false.
92func versionLess(a, b string) bool {
as, bs := strings.Split(a, "."), strings.Split(b, ".")
for i := 0; i < len(as) || i < len(bs); i++ {
var x, y int
if i < len(as) {
	n, err := strconv.Atoi(as[i])
	if err != nil {
		return false
	}
	x = n
}
if i < len(bs) {
	n, err := strconv.Atoi(bs[i])
	if err != nil {
		return false
	}
	y = n
}
if x != y {
	return x < y
}
}
return false
115}
116
117func init() {
check.Register(&check.Check{
ID:        "HOST-OS-001",
Title:     "Operating System Past End of Security Support",
Domain:    check.DomainHost,
Severity:  check.High,
CVSS:      "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
Summary:   "Checks whether the Linux distribution release still receives free security updates.",
Rationale: "Once a release reaches end of life, newly discovered vulnerabilities are never fixed. Every later CVE in the kernel, OpenSSL or the web server stays open forever.",
Detection: "Reads ID and VERSION_ID from /etc/os-release and looks them up in a dated table of free vendor security-support dates, including Debian LTS (table date " + EOLTableDate + "). Releases older than the oldest table row for their distribution fail. Releases within 90 days of end of life also fail, so there is time to plan the upgrade.",
Fix:       "Plan an upgrade to a supported release (for example do-release-upgrade on Ubuntu, or a fresh install and migration). Paid extended support (Ubuntu Pro, RHEL ELS) is an alternative while migrating.",
Verify:    "cat /etc/os-release  and compare with the vendor lifecycle page.",
Refs: []check.Ref{
	{Title: "Ubuntu release cycle", URL: "https://ubuntu.com/about/release-cycle"},
	{Title: "Debian releases and LTS", URL: "https://wiki.debian.org/LTS"},
	{Title: "Red Hat Enterprise Linux life cycle", URL: "https://access.redhat.com/support/policy/updates/errata"},
	{Title: "endoflife.date (community-maintained lifecycle data)", URL: "https://endoflife.date/"}},
Standards: check.Standards{CWE: []string{"CWE-1104"}, OWASP: []string{"A06:2021"}, NIST: []string{"SA-22", "SI-2"}, CISTopic: "Supported operating system versions"},
Run: func(_ context.Context, s sys.System) []check.Result {
	osr := collect.OSRelease(s)
	id, ver := osr["ID"], osr["VERSION_ID"]
	if id == "" {
		return []check.Result{check.SkipR("os-release", "Distribution could not be identified")}
	}
	name := osr["PRETTY_NAME"]
	if name == "" {
		name = id + " " + ver
	}
	end, bad, known, left := osEOL(id, ver, time.Now())
	switch {
	case !known:
		return []check.Result{check.SkipR(name, "Release not in the end-of-life table (dated "+EOLTableDate+")")}
	case bad && end == "":
		return []check.Result{check.FailR(name, "Release is older than every supported release in the end-of-life table (dated "+EOLTableDate+"), so security support has ended")}
	case bad && left < 0:
		return []check.Result{check.FailR(name, "Security support ended on "+end)}
	case bad:
		return []check.Result{check.FailR(name, fmt.Sprintf("Security support ends on %s (in %d days, within the %d-day planning window)", end, left, eolWarnDays))}
	}
	return []check.Result{check.PassR(name, "Supported until "+end)}
},
})
159
check.Register(&check.Check{
ID:        "HOST-PKG-001",
Title:     "Security Updates Waiting to Be Installed",
Domain:    check.DomainHost,
Severity:  check.High,
CVSS:      "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
Summary:   "Checks the package manager for published security updates that are not installed yet.",
Rationale: "Most real-world compromises use vulnerabilities for which a fix was already available. Pending security updates are known, public weaknesses.",
Detection: "Runs the package manager in simulation mode only (apt-get -s upgrade, or dnf/yum updateinfo --security). Nothing is downloaded or installed. Lines that come from a security repository are counted.",
Fix:       "Debian/Ubuntu: apt-get update && apt-get upgrade . RHEL family: dnf upgrade --security . Consider unattended-upgrades or dnf-automatic for security patches.",
Verify:    "Re-run openvapt; this check should pass.",
Refs: []check.Ref{
	{Title: "NIST SP 800-40 Rev. 4, Guide to Enterprise Patch Management Planning", URL: "https://csrc.nist.gov/pubs/sp/800/40/r4/final"},
	{Title: "Debian, UnattendedUpgrades", URL: "https://wiki.debian.org/UnattendedUpgrades"}},
Standards: check.Standards{CWE: []string{"CWE-1104"}, OWASP: []string{"A06:2021"}, NIST: []string{"SI-2", "RA-5"}, CISTopic: "Patch management: install security updates"},
Run: func(ctx context.Context, s sys.System) []check.Result {
	if out, err := s.Run(ctx, "apt-get", "-s", "upgrade"); err == nil {
		var sec []string
		for _, line := range strings.Split(out, "\n") {
			if strings.HasPrefix(line, "Inst ") && strings.Contains(strings.ToLower(line), "security") {
				f := strings.Fields(line)
				if len(f) > 1 {
					sec = append(sec, f[1])
				}
			}
		}
		if len(sec) > 0 {
			return []check.Result{check.FailR("apt", fmt.Sprintf("%d security updates pending", len(sec)), firstN(sec, 30)...)}
		}
		return []check.Result{check.PassR("apt", "No pending security updates (based on the last apt-get update)")}
	}
	for _, cmd := range [][]string{{"dnf", "-q", "updateinfo", "list", "--security"}, {"yum", "-q", "updateinfo", "list", "security"}} {
		if out, err := s.Run(ctx, cmd[0], cmd[1:]...); err == nil {
			var sec []string
			for _, line := range strings.Split(out, "\n") {
				// Only advisory lines count ("ALSA-2024:1234 Important/Sec. pkg"),
				// never the header or a footer dnf may print.
				if f := strings.Fields(line); len(f) >= 3 && advisoryIDRe.MatchString(f[0]) {
					sec = append(sec, f[0]+" "+f[2])
				}
			}
			if len(sec) > 0 {
				return []check.Result{check.FailR(cmd[0], fmt.Sprintf("%d security advisories pending", len(sec)), firstN(sec, 30)...)}
			}
			return []check.Result{check.PassR(cmd[0], "No pending security advisories")}
		}
	}
	return []check.Result{check.SkipR("packages", "No supported package manager found (apt, dnf, yum)")}
},
})
210}
211
212// advisoryIDRe matches vendor advisory ids such as RHSA-2024:1234,
213// ALSA-2024:5678, RLSA-2024:1 or FEDORA-2024-abcdef.
214var advisoryIDRe = regexp.MustCompile(`^[A-Z]{2,10}-\d{4}[:-][0-9a-zA-Z]+$`)
215
216func firstN(in []string, n int) []string {
if len(in) <= n {
return in
}
return append(in[:n:n], fmt.Sprintf("... and %d more", len(in)-n))
221}

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Cite This Page

If this page helped your work, please cite it. The version and web address are filled in; the access date is today's date in your browser. Every other style, and when credit is required, is on How to Cite OpenVAPT.

APA 7

OpenVAPT. (2026). HOST-OS-001 Operating System Past End of Security Support (Version 0.1.0-alpha.6). OpenVAPT Check Catalogue. Retrieved October 16, 2026, from https://openvapt.com/checks/HOST-OS-001.html

In text: (OpenVAPT, 2026). Accessed: the date shown is today's date from your own browser (the site's build date without JavaScript); change it to the day you read the page.

BibTeX

@misc{openvapt_host_os_001,
  author       = {{OpenVAPT}},
  title        = {{HOST-OS-001 Operating System Past End of Security Support}},
  year         = {2026},
  howpublished = {\url{https://openvapt.com/checks/HOST-OS-001.html}},
  note         = {OpenVAPT Check Catalogue, version 0.1.0-alpha.6. Accessed 16 October 2026}
}

Accessed: the date shown is today's date from your own browser (the site's build date without JavaScript); change it to the day you read the page.

Citing OpenVAPT does not mean OpenVAPT endorses, approves or has reviewed your work.

Cite This Work: OpenVAPT. (2026). OpenVAPT: An open academic vulnerability assessment tool (Version 0.1.0-alpha.6) [Computer software]. https://github.com/OpenVAPT/openvapt

1	package host
2
3	import (
4	"context"
5	"fmt"
6	"regexp"
7	"strconv"
8	"strings"
9	"time"
10
11	"github.com/openvapt/openvapt/internal/check"
12	"github.com/openvapt/openvapt/internal/checks/collect"
13	"github.com/openvapt/openvapt/internal/sys"
14	)
15
16	// eol maps "ID VERSION_ID" to the date standard (free) security support ends.
17	// Sources: each vendor's published lifecycle page, cited in the check refs.
18	// The table is dated; a release newer than this table may be missing, while a
19	// release older than the oldest row of its distribution is always past end of
20	// support and fails. Every row was re-verified on 2026-10-13 against the
21	// vendors' published schedules (Canonical, Debian, Red Hat, CentOS, Rocky,
22	// AlmaLinux, Oracle, Fedora, Amazon) as collected by endoflife.date, with the
23	// Fedora 44 date from Fedora's own schedule (fedorapeople.org f-44 key
24	// tasks). Fedora dates are provisional until the release two versions later
25	// ships; re-check them when the table is next refreshed.
26	var eol = map[string]string{
27	"ubuntu 16.04": "2021-04-02", "ubuntu 18.04": "2023-05-31", "ubuntu 20.04": "2025-05-31",
28	"ubuntu 20.10": "2021-07-22", "ubuntu 21.04": "2022-01-20", "ubuntu 21.10": "2022-07-14",
29	"ubuntu 22.04": "2027-06-01", "ubuntu 22.10": "2023-07-20", "ubuntu 23.04": "2024-01-20",
30	"ubuntu 23.10": "2024-07-12", "ubuntu 24.04": "2029-05-31", "ubuntu 24.10": "2025-07-10",
31	"ubuntu 25.04": "2026-01-17", "ubuntu 25.10": "2026-07-01", "ubuntu 26.04": "2031-05-31",
32	"debian 9": "2022-06-30", "debian 10": "2024-06-30", "debian 11": "2026-08-31", "debian 12": "2028-06-30", "debian 13": "2030-06-30",
33	// CentOS Linux 7 and 8; CentOS Stream 9 reports ID centos as well.
34	"centos 7": "2024-06-30", "centos 8": "2021-12-31", "centos 9": "2027-05-31", "centos 10": "2030-05-31",
35	"rhel 7": "2024-06-30", "rhel 8": "2029-05-31", "rhel 9": "2032-05-31", "rhel 10": "2035-05-31",
36	"rocky 8": "2029-05-31", "rocky 9": "2032-05-31", "rocky 10": "2035-05-31",
37	"almalinux 8": "2029-05-31", "almalinux 9": "2032-05-31", "almalinux 10": "2035-05-31",
38	"ol 7": "2024-12-31", "ol 8": "2029-07-31", "ol 9": "2032-06-30", "ol 10": "2035-06-30",
39	"fedora 39": "2024-11-26", "fedora 40": "2025-05-13", "fedora 41": "2025-12-15", "fedora 42": "2026-05-27",
40	"fedora 43": "2026-12-09", "fedora 44": "2027-06-02",
41	"amzn 2018.03": "2023-12-31", "amzn 2": "2026-06-30", "amzn 2023": "2029-06-30",
42	}
43
44	// EOLTableDate is printed in reports so readers know how fresh the table is.
45	const EOLTableDate = "2026-10-13"
46
47	// eolWarnDays is how close to end of support a release starts to fail, so
48	// there is time to plan the upgrade.
49	const eolWarnDays = 90
50
51	// majorOnly lists distributions whose support depends on the major version.
52	var majorOnly = map[string]bool{"centos": true, "rhel": true, "rocky": true, "almalinux": true, "ol": true, "debian": true}
53
54	// osEOL looks up one release. It returns the end date, whether the release
55	// is past (or within eolWarnDays of) end of support, and whether the result
56	// is known. A release older than every row for its distribution is reported
57	// as past end of support without a date.
58	func osEOL(id, ver string, now time.Time) (end string, bad, known bool, daysLeft int) {
59	if majorOnly[id] {
60	ver = strings.SplitN(ver, ".", 2)[0]
61	}
62	if e, ok := eol[id+" "+ver]; ok {
63	d, err := time.Parse("2006-01-02", e)
64	if err != nil {
65	return "", false, false, 0
66	}
67	left := d.Sub(now)
68	return e, left < eolWarnDays24time.Hour, true, int(left.Hours() / 24)
69	}
70	// Amazon Linux 1 used year.month versions; 2018.03 was the last, so any
71	// earlier one (2017.09, 2016.09, ...) is past end of support. Comparing
72	// against the oldest row would fail here, because "2" sorts before them.
73	if id == "amzn" && amznYear.MatchString(ver) && versionLess(ver, "2018.03") {
74	return "", true, true, 0
75	}
76	oldest := ""
77	for k := range eol {
78	if rid, rv, _ := strings.Cut(k, " "); rid == id && (oldest == "" \|\| versionLess(rv, oldest)) {
79	oldest = rv
80	}
81	}
82	if oldest != "" && ver != "" && versionLess(ver, oldest) {
83	return "", true, true, 0
84	}
85	return "", false, false, 0
86	}
87
88	var amznYear = regexp.MustCompile(`^20[01][0-9]\.[0-9]{2}$`)
89
90	// versionLess compares dotted numeric versions ("16.04" < "18.04", "9" < "10").
91	// A non-numeric component makes the comparison false.
92	func versionLess(a, b string) bool {
93	as, bs := strings.Split(a, "."), strings.Split(b, ".")
94	for i := 0; i < len(as) \|\| i < len(bs); i++ {
95	var x, y int
96	if i < len(as) {
97	n, err := strconv.Atoi(as[i])
98	if err != nil {
99	return false
100	}
101	x = n
102	}
103	if i < len(bs) {
104	n, err := strconv.Atoi(bs[i])
105	if err != nil {
106	return false
107	}
108	y = n
109	}
110	if x != y {
111	return x < y
112	}
113	}
114	return false
115	}
116
117	func init() {
118	check.Register(&check.Check{
119	ID: "HOST-OS-001",
120	Title: "Operating System Past End of Security Support",
121	Domain: check.DomainHost,
122	Severity: check.High,
123	CVSS: "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
124	Summary: "Checks whether the Linux distribution release still receives free security updates.",
125	Rationale: "Once a release reaches end of life, newly discovered vulnerabilities are never fixed. Every later CVE in the kernel, OpenSSL or the web server stays open forever.",
126	Detection: "Reads ID and VERSION_ID from /etc/os-release and looks them up in a dated table of free vendor security-support dates, including Debian LTS (table date " + EOLTableDate + "). Releases older than the oldest table row for their distribution fail. Releases within 90 days of end of life also fail, so there is time to plan the upgrade.",
127	Fix: "Plan an upgrade to a supported release (for example do-release-upgrade on Ubuntu, or a fresh install and migration). Paid extended support (Ubuntu Pro, RHEL ELS) is an alternative while migrating.",
128	Verify: "cat /etc/os-release and compare with the vendor lifecycle page.",
129	Refs: []check.Ref{
130	{Title: "Ubuntu release cycle", URL: "https://ubuntu.com/about/release-cycle"},
131	{Title: "Debian releases and LTS", URL: "https://wiki.debian.org/LTS"},
132	{Title: "Red Hat Enterprise Linux life cycle", URL: "https://access.redhat.com/support/policy/updates/errata"},
133	{Title: "endoflife.date (community-maintained lifecycle data)", URL: "https://endoflife.date/"}},
134	Standards: check.Standards{CWE: []string{"CWE-1104"}, OWASP: []string{"A06:2021"}, NIST: []string{"SA-22", "SI-2"}, CISTopic: "Supported operating system versions"},
135	Run: func(_ context.Context, s sys.System) []check.Result {
136	osr := collect.OSRelease(s)
137	id, ver := osr["ID"], osr["VERSION_ID"]
138	if id == "" {
139	return []check.Result{check.SkipR("os-release", "Distribution could not be identified")}
140	}
141	name := osr["PRETTY_NAME"]
142	if name == "" {
143	name = id + " " + ver
144	}
145	end, bad, known, left := osEOL(id, ver, time.Now())
146	switch {
147	case !known:
148	return []check.Result{check.SkipR(name, "Release not in the end-of-life table (dated "+EOLTableDate+")")}
149	case bad && end == "":
150	return []check.Result{check.FailR(name, "Release is older than every supported release in the end-of-life table (dated "+EOLTableDate+"), so security support has ended")}
151	case bad && left < 0:
152	return []check.Result{check.FailR(name, "Security support ended on "+end)}
153	case bad:
154	return []check.Result{check.FailR(name, fmt.Sprintf("Security support ends on %s (in %d days, within the %d-day planning window)", end, left, eolWarnDays))}
155	}
156	return []check.Result{check.PassR(name, "Supported until "+end)}
157	},
158	})
159
160	check.Register(&check.Check{
161	ID: "HOST-PKG-001",
162	Title: "Security Updates Waiting to Be Installed",
163	Domain: check.DomainHost,
164	Severity: check.High,
165	CVSS: "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
166	Summary: "Checks the package manager for published security updates that are not installed yet.",
167	Rationale: "Most real-world compromises use vulnerabilities for which a fix was already available. Pending security updates are known, public weaknesses.",
168	Detection: "Runs the package manager in simulation mode only (apt-get -s upgrade, or dnf/yum updateinfo --security). Nothing is downloaded or installed. Lines that come from a security repository are counted.",
169	Fix: "Debian/Ubuntu: apt-get update && apt-get upgrade . RHEL family: dnf upgrade --security . Consider unattended-upgrades or dnf-automatic for security patches.",
170	Verify: "Re-run openvapt; this check should pass.",
171	Refs: []check.Ref{
172	{Title: "NIST SP 800-40 Rev. 4, Guide to Enterprise Patch Management Planning", URL: "https://csrc.nist.gov/pubs/sp/800/40/r4/final"},
173	{Title: "Debian, UnattendedUpgrades", URL: "https://wiki.debian.org/UnattendedUpgrades"}},
174	Standards: check.Standards{CWE: []string{"CWE-1104"}, OWASP: []string{"A06:2021"}, NIST: []string{"SI-2", "RA-5"}, CISTopic: "Patch management: install security updates"},
175	Run: func(ctx context.Context, s sys.System) []check.Result {
176	if out, err := s.Run(ctx, "apt-get", "-s", "upgrade"); err == nil {
177	var sec []string
178	for _, line := range strings.Split(out, "\n") {
179	if strings.HasPrefix(line, "Inst ") && strings.Contains(strings.ToLower(line), "security") {
180	f := strings.Fields(line)
181	if len(f) > 1 {
182	sec = append(sec, f[1])
183	}
184	}
185	}
186	if len(sec) > 0 {
187	return []check.Result{check.FailR("apt", fmt.Sprintf("%d security updates pending", len(sec)), firstN(sec, 30)...)}
188	}
189	return []check.Result{check.PassR("apt", "No pending security updates (based on the last apt-get update)")}
190	}
191	for _, cmd := range [][]string{{"dnf", "-q", "updateinfo", "list", "--security"}, {"yum", "-q", "updateinfo", "list", "security"}} {
192	if out, err := s.Run(ctx, cmd[0], cmd[1:]...); err == nil {
193	var sec []string
194	for _, line := range strings.Split(out, "\n") {
195	// Only advisory lines count ("ALSA-2024:1234 Important/Sec. pkg"),
196	// never the header or a footer dnf may print.
197	if f := strings.Fields(line); len(f) >= 3 && advisoryIDRe.MatchString(f[0]) {
198	sec = append(sec, f[0]+" "+f[2])
199	}
200	}
201	if len(sec) > 0 {
202	return []check.Result{check.FailR(cmd[0], fmt.Sprintf("%d security advisories pending", len(sec)), firstN(sec, 30)...)}
203	}
204	return []check.Result{check.PassR(cmd[0], "No pending security advisories")}
205	}
206	}
207	return []check.Result{check.SkipR("packages", "No supported package manager found (apt, dnf, yum)")}
208	},
209	})
210	}
211
212	// advisoryIDRe matches vendor advisory ids such as RHSA-2024:1234,
213	// ALSA-2024:5678, RLSA-2024:1 or FEDORA-2024-abcdef.
214	var advisoryIDRe = regexp.MustCompile(`^[A-Z]{2,10}-\d{4}[:-][0-9a-zA-Z]+$`)
215
216	func firstN(in []string, n int) []string {
217	if len(in) <= n {
218	return in
219	}
220	return append(in[:n:n], fmt.Sprintf("... and %d more", len(in)-n))
221	}