CVE-2019-11596

Publication date 29 April 2019

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

In memcached before 1.5.14, a NULL pointer dereference was found in the "lru mode" and "lru temp_ttl" commands. This causes a denial of service when parsing crafted lru command messages in process_lru_command in memcached.c.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
memcached	19.04 disco	Fixed 1.5.10-0ubuntu1.19.04.1
	18.10 cosmic	Fixed 1.5.10-0ubuntu1.18.10.1
	18.04 LTS bionic	Fixed 1.5.6-0ubuntu1.1
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not in release

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
memcached	Upstream: d35334f

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.5 · High

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality impact	None
Integrity impact	None
Availability impact	High

Scores

Parameter	Value
Base score	7.5 · High
Exploitability score	-
Impact score	-

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-3963-1
Memcached vulnerability
1 May 2019

Other references

https://www.cve.org/CVERecord?id=CVE-2019-11596