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Vulnerability record · CVE-2011-4971 · published 12 December 2013

CVE-2011-4971: Memcached vulnerability

MMemcached · Memcached

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.

5.0 CVSS 2.0 Medium EPSS 22% · top 2.4% CWE-189 · CWE-189
5.0CVSS 2.0 base score
22%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
16References, 4 tagged exploit
16 Jun 2026Last modified by NVD

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.

AV:N/AC:L/Au:N/C:N/I:N/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://insecurety.net/?p=872 Exploit
http://secunia.com/advisories/56183
http://www.debian.org/security/2014/dsa-2832
http://www.mandriva.com/security/advisories?name=MDVSA-2013:280
http://www.securityfocus.com/bid/59567
http://www.ubuntu.com/usn/USN-2080-1
https://code.google.com/p/memcached/issues/detail?id=192 ExploitPatch
https://puppet.com/security/cve/cve-2011-4971
http://insecurety.net/?p=872 Exploit
http://secunia.com/advisories/56183
http://www.debian.org/security/2014/dsa-2832
http://www.mandriva.com/security/advisories?name=MDVSA-2013:280
http://www.securityfocus.com/bid/59567
http://www.ubuntu.com/usn/USN-2080-1
https://code.google.com/p/memcached/issues/detail?id=192 ExploitPatch
https://puppet.com/security/cve/cve-2011-4971

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-46853Memcached vulnerabilityIn Memcached before 1.6.22, an off-by-one error exists when processing proxy requests in proxy mode, if \n is used instead of \r\n.EPSS 0.76%9.8CVE-2016-8704Memcached integer overflow vulnerabilityAn integer overflow in the process_bin_append_prepend function in Memcached, which is responsible for processing multiple commands of Memcached binar…EPSS 23%9.8CVE-2016-8705Memcached integer overflow vulnerabilityMultiple integer overflows in process_bin_update function in Memcached, which is responsible for processing multiple commands of Memcached binary pro…EPSS 20%8.1CVE-2026-47783Memcached vulnerabilityIn memcached before 1.6.42, username data for SASL password database authentication has a timing side channel because a loop exits as soon as a valid…EPSS 1.3%8.1CVE-2026-47784Memcached vulnerabilityIn memcached before 1.6.42, password data for SASL password database authentication has a timing side channel because memcmp is used by sasl_server_u…EPSS 0.55%8.1CVE-2016-8706Memcached binary protocol SASL auth integer overflow leads to RCEAn integer overflow in the process_bin_sasl_auth function, which handles authentication commands in the Memcached binary protocol, can cause a heap o…EPSS 46%analysed7.5CVE-2023-46852Memcached classic buffer overflow vulnerabilityIn Memcached before 1.6.22, a buffer overflow exists when processing multiget requests in proxy mode, if there are many spaces after the "get" substr…EPSS 0.78%7.5CVE-2022-48571Memcached uncontrolled resource consumption vulnerabilitymemcached 1.6.7 allows a Denial of Service via multi-packet uploads in UDP.EPSS 1.1%

Source: NIST National Vulnerability Database (record CVE-2011-4971), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.