Vulnerability Report

CVE-2018-7169

Title: Shadow Project Shadow Auth Bypass

Auth Bypass

Proof Of Concept

No public PoC currently indexed for CVE-2018-7169.

CWE Category CWE-732
Published Date Feb 15, 2018
Modified Date Jun 17, 2026
Exploit Status Not Found
Score 5.3 CVSS v3.0
Exploit Probability (EPSS)
1.57%

Vulnerability Summary

CVE-2018-7169: 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.

Impacted Vendors

S
shadow_project 1
B
blade-group 1

Reference Links

https://bugs.launchpad.net/ubuntu/+source/shadow/+bug/1729357 https://security.gentoo.org/glsa/201805-09 https://bugs.launchpad.net/ubuntu/+source/shadow/+bug/1729357 https://security.gentoo.org/glsa/201805-09
CVSS v3.0
Source Entity [email protected]
Severity MEDIUM
5.3
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
5.0
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:N/C:P/I:N/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2018-7169 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected Stack

No specific products linked.