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Vulnerability details: VCID-n6ua-k7jb-aaap
Vulnerability ID VCID-n6ua-k7jb-aaap
Aliases CVE-2018-7169
Summary An issue was discovered in shadow 4.5. newgidmap (in shadow-utils) is setuid and allows an unprivileged user to be placed in a user namespace where setgroups(2) is permitted. This allows an attacker to remove themselves from a supplementary group, which may allow access to certain filesystem paths if the administrator has used "group blacklisting" (e.g., chmod g-rwx) to restrict access to paths. This flaw effectively reverts a security feature in the kernel (in particular, the /proc/self/setgroups knob) to prevent this sort of privilege escalation.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (2)
CWE-732 Incorrect Permission Assignment for Critical Resource
CWE-271 Privilege Dropping / Lowering Errors
System Score Found at
generic_textual Low http://people.canonical.com/~ubuntu-security/cve/2018/CVE-2018-7169.html
cvssv3 4.4 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-7169.json
epss 0.00077 https://api.first.org/data/v1/epss?cve=CVE-2018-7169
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epss 0.00081 https://api.first.org/data/v1/epss?cve=CVE-2018-7169
epss 0.00081 https://api.first.org/data/v1/epss?cve=CVE-2018-7169
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epss 0.00292 https://api.first.org/data/v1/epss?cve=CVE-2018-7169
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epss 0.00294 https://api.first.org/data/v1/epss?cve=CVE-2018-7169
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epss 0.00546 https://api.first.org/data/v1/epss?cve=CVE-2018-7169
rhbs medium https://bugzilla.redhat.com/show_bug.cgi?id=1546241
generic_textual Low https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-7169
cvssv3 6.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
generic_textual Low https://github.com/shadow-maint/shadow/pull/97
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2018-7169
cvssv3 5.3 https://nvd.nist.gov/vuln/detail/CVE-2018-7169
Reference id Reference type URL
http://people.canonical.com/~ubuntu-security/cve/2018/CVE-2018-7169.html
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-7169.json
https://api.first.org/data/v1/epss?cve=CVE-2018-7169
https://bugs.launchpad.net/ubuntu/+source/shadow/+bug/1729357
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-7169
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/shadow-maint/shadow/pull/97
https://security.gentoo.org/glsa/201805-09
1546241 https://bugzilla.redhat.com/show_bug.cgi?id=1546241
890557 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=890557
cpe:2.3:a:shadow_project:shadow:4.5:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:shadow_project:shadow:4.5:*:*:*:*:*:*:*
CVE-2018-7169 https://nvd.nist.gov/vuln/detail/CVE-2018-7169
USN-5254-1 https://usn.ubuntu.com/5254-1/
No exploits are available.
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2018-7169.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-7169
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2018-7169
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.35272
EPSS Score 0.00077
Published At Dec. 17, 2024, midnight
Date Actor Action Source VulnerableCode Version
There are no relevant records.