CVE-2018-7169 Privilege escalation in n/a
An unprivileged user can bypass kernel security restrictions to remove themselves from supplementary groups, potentially gaining unauthorized access to restricted filesystem paths.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-7169?
CVE-2018-7169 is a medium-severity vulnerability in n/a, published on 15 Feb 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-732
Which versions are affected by CVE-2018-7169?
It affects 1 product.
Linux distribution packages (8)
shadow SUSE:Linux Enterprise Desktop 12 SP2 | All versions | 4.2.1-27.6.1 |
shadow SUSE:Linux Enterprise Desktop 12 SP3 | All versions | 4.2.1-27.6.1 |
shadow SUSE:Linux Enterprise Server 12 SP2 | All versions | 4.2.1-27.6.1 |
shadow SUSE:Linux Enterprise Server 12 SP3 | All versions | 4.2.1-27.6.1 |
shadow SUSE:Linux Enterprise Server for Raspberry Pi 12 SP2 | All versions | 4.2.1-27.6.1 |
shadow SUSE:Linux Enterprise Server for SAP Applications 12 SP2 | All versions | 4.2.1-27.6.1 |
shadow SUSE:Linux Enterprise Server for SAP Applications 12 SP3 | All versions | 4.2.1-27.6.1 |
shadow openSUSE:Tumbleweed | All versions | 4.9-1.1 |
Products include Shadow Project Shadow.
How do I fix CVE-2018-7169?
Apply the vendor's patch.
Is CVE-2018-7169 being exploited?
There is no known exploitation of CVE-2018-7169 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2018-7169, GHSA-m2px-jr9v-8hhp, MGASA-2018-0177, SUSE-SU-2018:0662-1, UBUNTU-CVE-2018-7169, openSUSE-SU-2024:11378-1.