SB2017121317 - Fedora 27 update for glibc
Published: December 13, 2017 Updated: April 24, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Integer overflow (CVE-ID: CVE-2017-17426)
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
The malloc function in the GNU C Library (aka glibc or libc6) 2.26 could return a memory block that is too small if an attempt is made to allocate an object whose size is close to SIZE_MAX, potentially leading to a subsequent heap overflow. This occurs because the per-thread cache (aka tcache) feature enables a code path that lacks an integer overflow check.
2) Buffer overflow (CVE-ID: CVE-2017-15804)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The weakness exists in the glob function in glob.c due to buffer overflow during unescaping of user names with the ~ operator. A remote attacker can trigger memory corruption and execute arbitrary code.
Successful exploitation of the vulnerability may result in system compromise.
Remediation
Install update from vendor's website.