SB2017080957 - Buffer over-read in memcached (Alpine package)
Published: August 9, 2017
Security Bulletin ID
SB2017080957
Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Buffer over-read (CVE-ID: CVE-2017-9951)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in the try_read_command function in memcached.c in memcached before 1.4.39. A remote attacker can perform a denial of service (segmentation fault) via a request to add/set a key, which makes a comparison between signed and unsigned int and triggers a heap-based buffer over-read.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=051c3cef7a51ff57a5f7da7bea7c9ee7592ba1f2
- https://git.alpinelinux.org/aports/commit/?id=2f8c26956e9dccf4bba525609ec28da21fa4ddbc
- https://git.alpinelinux.org/aports/commit/?id=778e651edc212ac8c18bddeb60d473d9a1bbb53d
- https://git.alpinelinux.org/aports/commit/?id=925330ee890cc038d238a8eb8b6220e83b9858e4