Bug 2239845 (CVE-2023-42754)

Summary:	CVE-2023-42754 kernel: ipv4: NULL pointer dereference in ipv4_send_dest_unreach()
Product:	[Other] Security Response	Reporter:	Patrick Del Bello <pdelbell>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, allarkin, bhu, chwhite, cye, dbohanno, debarbos, dfreiber, drow, dvlasenk, ezulian, hkrzesin, jarod, jburrell, jdenham, jfaracco, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, ldoskova, lgoncalv, lzampier, nmurray, ptalbert, rogbas, rparrazo, rrobaina, rvrbovsk, rysulliv, scweaver, security-response-team, tglozar, tyberry, vkumar, wcosta, williams, wmealing, ybuenos, ycote, ykopkova, zhijwang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 6.6-rc3	Doc Type:	If docs needed, set a value
Doc Text:	A NULL pointer dereference flaw was found in the Linux kernel ipv4 stack. The socket buffer (skb) was assumed to be associated with a device before calling __ip_options_compile, which is not always the case if the skb is re-routed by ipvs. This issue may allow a local user with CAP_NET_ADMIN privileges to crash the system.	Story Points:	---
Clone Of:		Environment:
Last Closed:		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:	2242284
Bug Blocks:	2267764, 2238729

Description Patrick Del Bello 2023-09-20 13:52:35 UTC

A flaw was found in ipv4_send_dest_unreach() due to NULL pointer derefence due to a missing edge-case check.

Comment 3 Mauro Matteo Cascella 2023-10-05 10:52:44 UTC

Reference:
https://seclists.org/oss-sec/2023/q4/14

Upstream fix:
https://github.com/torvalds/linux/commit/0113d9c9d1ccc07f5a3710dac4aa24b6d711278c

Comment 4 Mauro Matteo Cascella 2023-10-05 10:54:33 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2242284]

Comment 8 Alex 2024-04-24 13:38:50 UTC

*** Bug 2267759 has been marked as a duplicate of this bug. ***

Comment 9 errata-xmlrpc 2024-04-30 10:13:56 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:2394 https://access.redhat.com/errata/RHSA-2024:2394

Comment 10 errata-xmlrpc 2024-05-22 09:14:42 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:2950 https://access.redhat.com/errata/RHSA-2024:2950

Comment 11 errata-xmlrpc 2024-05-22 09:52:06 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:3138 https://access.redhat.com/errata/RHSA-2024:3138