SB2013111503 - Permissions, Privileges, and Access Controls in lighttpd (Alpine package)
Published: November 15, 2013
Security Bulletin ID
SB2013111503
Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2013-4559)
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
lighttpd before 1.4.33 does not check the return value of the (1) setuid, (2) setgid, or (3) setgroups functions, which might cause lighttpd to run as root if it is restarted and allows remote attackers to gain privileges, as demonstrated by multiple calls to the clone function that cause setuid to fail when the user process limit is reached.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=6164d3a4445a58197b45c1fa3ee7f979d1a3cc10
- https://git.alpinelinux.org/aports/commit/?id=97e3e4a22ce07cac395ee446b48a92f9ceceaaac
- https://git.alpinelinux.org/aports/commit/?id=0238d08745129ac6330aec20e5f110bf3bec3599
- https://git.alpinelinux.org/aports/commit/?id=0889a3519104f2dc0c76d35edda4bdc087d6ab56