SB2018030509 - Ubuntu update for Memcached
Published: March 5, 2018
Security Bulletin ID
SB2018030509
Severity
High
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
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.
2) Network amplification (CVE-ID: CVE-2018-1000115)
The vulnerability allows a remote unauthenticated attacker to conduct DDoS amplification attack against the target system.The weakness exists due to insufficient control of network message volume. A remote attacker can scan for affected, insecure Memcached servers via UDP port 11211,spoof UDP packets, send a specially crafted request, trigger a response and conduct DDoS amplification attack.
Remediation
Install update from vendor's website.