CVE-2011-4971

memcached < 1.4.5 - Denial of Service via Integer Signedness Error

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2011-4971. Includes Metasploit module auxiliary/dos/misc/memcached.

AI-analyzed exploit summary This Metasploit module exploits a denial-of-service vulnerability in memcached v1.4.15 or earlier by sending a malformed packet to trigger a segmentation fault. It checks the target's status post-exploitation to confirm the DoS.

Description

Multiple integer signedness errors in the (1) process_bin_sasl_auth, (2) process_bin_complete_sasl_auth, (3) process_bin_update, and (4) process_bin_append_prepend functions in Memcached 1.4.5 and earlier allow remote attackers to cause a denial of service (crash) via a large body length value in a packet.

Exploits (1)

metasploit WORKING POC
rubypoc
https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/dos/misc/memcached.rb

This Metasploit module exploits a denial-of-service vulnerability in memcached v1.4.15 or earlier by sending a malformed packet to trigger a segmentation fault. It checks the target's status post-exploitation to confirm the DoS.

Classification
Working Poc 100%
Attack Type
Dos
Complexity
Trivial
Reliability
Reliable
Target: memcached v1.4.15 or earlier
No auth needed
Prerequisites: Network access to the target's memcached port (default 11211)
devstral-2 · analyzed Feb 16, 2026 Full analysis →

References (8)

Core 8
Core References
Exploit x_refsource_misc
http://insecurety.net/?p=872
Vendor Advisory vendor-advisory x_refsource_mandriva
http://www.mandriva.com/security/advisories?name=MDVSA-2013:280
Vendor Advisory vendor-advisory x_refsource_ubuntu
http://www.ubuntu.com/usn/USN-2080-1
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/59567
Various Sources x_refsource_confirm
https://puppet.com/security/cve/cve-2011-4971
Third Party Advisory vendor-advisory x_refsource_debian
http://www.debian.org/security/2014/dsa-2832
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/56183

Scores

EPSS 0.4607
EPSS Percentile 97.7%

Details

CWE
CWE-189
Status published
Products (8)
memcached/memcached 1.2.7
memcached/memcached 1.2.8
memcached/memcached 1.4.0
memcached/memcached 1.4.1
memcached/memcached 1.4.2
memcached/memcached 1.4.3
memcached/memcached 1.4.4
memcached/memcached < 1.4.5
Published Dec 12, 2013
Tracked Since Feb 18, 2026