Bug 1706001 (CVE-2019-11596)

Summary:	CVE-2019-11596 memcached: null-pointer dereference in "lru mode" and "lru temp_ttl" causing denial of service
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	apevec, chris.snell, dbecker, hguemar, jjoyce, jorton, jschluet, kbasil, lhh, lindner, lpeer, matthias, mburns, mlichvar, rschiron, sclewis, slinaber
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	memcached 1.5.14	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-04-28 16:32:45 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1706002, 1709093, 1709094, 1709095, 1709104, 1709408
Bug Blocks:	1706006

Description Dhananjay Arunesh 2019-05-03 11:40:30 UTC

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.

Reference:
https://github.com/memcached/memcached/issues/474

Upstream commit:
https://github.com/memcached/memcached/compare/ee1cfe3...50bdc9f
https://github.com/memcached/memcached/commit/d35334f368817a77a6bd1f33c6a5676b2c402c02

Comment 1 Dhananjay Arunesh 2019-05-03 11:41:04 UTC

Created memcached tracking bugs for this issue:

Affects: fedora-all [bug 1706002]

Comment 2 Joshua Padman 2019-05-13 04:01:09 UTC

The vulnerable code is not present in the version of memcached that ships for Red Hat OpenStack Platform 9 (memcached-1.4.15-9.4.el7ost). All other supported versions are vulnerable.

Comment 6 Joshua Padman 2019-05-13 04:22:39 UTC

Created memcached tracking bugs for this issue:

Affects: openstack-rdo [bug 1709104]

Comment 7 Riccardo Schirone 2019-05-13 14:11:07 UTC

Bugs introduced in:
https://github.com/memcached/memcached/commit/dc5f65d38a4c8f8b51e0dace323374ec76fcc647
https://github.com/memcached/memcached/commit/d67cfbf9922f7f4be6ee7315b0877c796b182e7d

Comment 9 Riccardo Schirone 2019-05-13 14:24:05 UTC

Statement:

The vulnerable code is not present in the versions of memcached as shipped in Red Hat Enterprise Linux 6 and 7, so they are not affected by this flaw.

Comment 13 errata-xmlrpc 2020-04-28 15:25:31 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:1576 https://access.redhat.com/errata/RHSA-2020:1576

Comment 14 Product Security DevOps Team 2020-04-28 16:32:45 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-11596

Comment 17 errata-xmlrpc 2020-12-16 14:01:24 UTC

This issue has been addressed in the following products:

  Red Hat OpenStack Platform 13.0 (Queens)
  Red Hat OpenStack Platform 13.0 (Queens) for RHEL 7.6 EUS

Via RHSA-2020:5583 https://access.redhat.com/errata/RHSA-2020:5583