SB2015100517 - Fedora 23 update for kernel
Published: October 5, 2015 Updated: April 24, 2025
Security Bulletin ID
SB2015100517
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Path traversal (CVE-ID: CVE-2015-2925)
CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to gain elevated privileges on the target system.
The weakness exists in the prepend_path function in fs/dcache.c due to improper handling of rename actions inside a bind mount. A local attacker can bypass an intended container protection mechanism by renaming a directory, related to a "double-chroot attack" and gain root privileges.
2) Race condition (CVE-ID: CVE-2015-7613)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to gain elevated privileges on the target system.
The weakness exists in the IPC object implementation due to race condition. A local attacker can trigger an ipc_addid call that leads to uid and gid comparisons against uninitialized data, related to msg.c, shm.c, and util.c and gain root privileges.
Remediation
Install update from vendor's website.