Bug 2281101 (CVE-2024-27415)

Summary:	CVE-2024-27415 kernel: netfilter: bridge: confirm multicast packets before passing them up the stack
Product:	[Other] Security Response	Reporter:	Zack Miele <zmiele>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, allarkin, aquini, bhu, chwhite, cye, cyin, dbohanno, debarbos, dfreiber, drow, dvlasenk, esandeen, ezulian, hkrzesin, jarod, jburrell, jdenham, jfaracco, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, ldoskova, lgoncalv, lzampier, mleitner, mmilgram, mstowell, nmurray, ptalbert, rparrazo, rrobaina, rvrbovsk, rysulliv, scweaver, sidakwo, sukulkar, tglozar, tyberry, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 5.15.151, kernel 6.1.81, kernel 6.6.21, kernel 6.7.9, kernel 6.8	Doc Type:	If docs needed, set a value
Doc Text:	A security vulnerability was identified in the Linux kernel's netfilter subsystem, specifically affecting the handling of multicast and broadcast packets on network bridges. The issue arises from a race condition in the connection tracking (conntrack) module when processing cloned socket buffers (skbs) that reference the same connection entry (nf_conn). This condition can lead to system instability or potential security risks.	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:	2281102
Bug Blocks:	2281789

Description Zack Miele 2024-05-17 21:57:59 UTC

In the Linux kernel, the following vulnerability has been resolved:

netfilter: bridge: confirm multicast packets before passing them up the stack

The Linux kernel CVE team has assigned CVE-2024-27415 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024051702-CVE-2024-27415-dcae@gregkh/T

Comment 1 Zack Miele 2024-05-17 21:58:35 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2281102]

Comment 5 Alex 2024-06-09 16:10:40 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2024-27415 is: CHECK	Maybe valid. Check manually. with impact MODERATE (that is an approximation based on flags INIT NETFILTER RACE SKB  ; these flags parsed automatically based on patch data). Such automatic check happens only for Low/Moderates (and only when not from reporter, but parsing already existing CVE). Highs always checked manually (I check it myself and then we check it again in Remediation team). In rare cases some of the Moderates could be increased to High later.

Comment 16 errata-xmlrpc 2024-08-28 12:20:21 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:5928 https://access.redhat.com/errata/RHSA-2024:5928

Comment 17 errata-xmlrpc 2024-10-02 00:35:09 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Extended Update Support

Via RHSA-2024:7490 https://access.redhat.com/errata/RHSA-2024:7490

Comment 18 errata-xmlrpc 2024-10-02 00:53:08 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Extended Update Support

Via RHSA-2024:7489 https://access.redhat.com/errata/RHSA-2024:7489