Privilege escalation in util-linux
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2018-7738 |
| CWE-ID | CWE-264 |
| Exploitation vector | Local |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software Subscribe |
Util-linux Universal components / Libraries / Libraries used by multiple products |
| Vendor | kernel.org |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Privilege escalation
EUVDB-ID: #VU10957
Risk: Low
CVSSv3.1: 7 [CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2018-7738
CWE-ID:
CWE-264 - Permissions, Privileges, and Access Controls
Exploit availability: No
DescriptionThe vulnerability allows a local attacker to gain elevated privileges on the target system.
The weakness exists due to insufficient validation of shell commands that are used in the name of a mountpoint. A local attacker can embed crafted shell commands in the name of a mountpoint. If another user on the system executes the umount command along with a tab character for autocomplete, the attacker can gain elevated privileges.
Update to version 2.32-rc1.
Vulnerable software versionsUtil-linux: 2.20 - 2.31
External linkshttp://mirrors.edge.kernel.org/pub/linux/utils/util-linux/v2.32/v2.32-rc1-ChangeLog
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.
