SB2017100811 - Fedora 27 update for glibc
Published: October 8, 2017 Updated: April 24, 2025
Security Bulletin ID
SB2017100811
CSH Severity
High
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Memory corruption (CVE-ID: CVE-2017-15670)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to execute arbitrary code with elevated privileges on the target system.
The weakness exists in the glob function in glob.c due to off-by-one error. A remote attacker can trigger heap-based buffer overflow and execute arbitrary code with root privileges.
Successful exploitation of the vulnerability may result in system compromise.
2) Memory leak (CVE-ID: CVE-2017-15671)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The weakness exists in the glob function in glob.c due to it skips freeing allocated memory when processing the ~ operator with a long user name when invoked with GLOB_TILDE. A remote attacker can trigger memory corruption and cause the service to crash.
Remediation
Install update from vendor's website.