Bug 2210940 (CVE-2023-32269)

Summary:	CVE-2023-32269 kernel: user after free in nr_listen in net/netrom/af_netrom.c
Product:	[Other] Security Response	Reporter:	Rohit Keshri <rkeshri>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, allarkin, bhu, chwhite, crwood, dbohanno, ddepaula, debarbos, dfreiber, dvlasenk, ezulian, hkrzesin, jarod, jburrell, jdenham, jfaracco, jferlan, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, kernel-mgr, ldoskova, lgoncalv, lleshchi, lzampier, nmurray, ptalbert, qzhao, rogbas, rrobaina, rvrbovsk, rysulliv, scweaver, tyberry, vkumar, walters, wcosta, williams, wmealing, ycote
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	Kerel 6.2-rc7	Doc Type:	If docs needed, set a value
Doc Text:	A use-after-free flaw was found in nr_listen in net/netrom/af_netrom.c in the Linux Kernel. The system must have netrom routing configured or an attacker must have the CAP_NET_ADMIN capability for this issue to be exploited.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-05-30 11:12:26 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:
Bug Blocks:	2193495

Description Rohit Keshri 2023-05-30 06:26:08 UTC

An issue was discovered in the Linux kernel before 6.1.11. In net/netrom/af_netrom.c, there is a use-after-free because accept is also allowed for a successfully connected AF_NETROM socket. However, in order for an attacker to exploit this, the system must have netrom routing configured or the attacker must have the CAP_NET_ADMIN capability.

Refer:
https://github.com/torvalds/linux/commit/611792920925fb088ddccbe2783c7f92fdfb6b64

Comment 2 Rohit Keshri 2023-05-30 06:36:39 UTC

There was no shipped kernel version were seen affected with this problem. These files are not built in our source code.

Comment 5 Product Security DevOps Team 2023-05-30 11:12:22 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-2023-32269