CVE-2011-4971

5.0 MEDIUM 22% exploit odds Fix listed Denial of service Server

What it is

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.

At a glance

Exploitability: Can be exploited over the network without logging in. Limited direct impact.
Exploit odds: 22.3% chance of exploitation in the next 30 days (EPSS). Higher than most.
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2013-12-12 18:55 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 23:35 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 22.3% in the next 30 days (EPSS).
Severity: 5.0 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2013-12-12 18:55 UTC
Last modified: 2026-06-16 23:35 UTC
Exploit probability: 22.3% · EPSS, next 30 days
Weakness: CWE-189
Record status: Modified

Affected

Memcached ≤ 1.4.5
Memcached 1.2.7
Memcached 1.2.8
Memcached 1.4.0
Memcached 1.4.1
Memcached 1.4.2
Memcached 1.4.3
Memcached 1.4.4

Attack profile CVSS 2.0 · 5.0

Attack vector: Network
Complexity: Low
Authentication: None
Confidentiality: None
Integrity: None
Availability: Partial

Raw vector

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

Is it in your code?

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Fix and advisories

References

NVD record · CVE.org record