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CVE-2017-9951

Published: 17 July 2017

The try_read_command function in memcached.c in memcached before 1.4.39 allows remote attackers to cause 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. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-8705.

From the Ubuntu Security Team

Daniel Shapira discovered an integer overflow issue in Memcached. A remote attacker could use this to cause a denial of service (daemon crash).

Priority

Low

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
memcached
Launchpad, Ubuntu, Debian
trusty
Released (1.4.14-0ubuntu9.2)
upstream
Released (1.4.39)
xenial
Released (1.4.25-2ubuntu1.3)
artful
Released (1.4.33-1ubuntu3.2)
yakkety Ignored
(end of life)
zesty Ignored
(end of life)
Patches:
upstream: https://github.com/memcached/memcached/commit/328629445c71e6c17074f6e9e0e3ef585b58f167

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H