Bug 2155196 (CVE-2022-3606)

Summary:	CVE-2022-3606 kernel: libbpf: NULL pointer dereference in find_prog_by_sec_insn
Product:	[Other] Security Response	Reporter:	Mauro Matteo Cascella <mcascell>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	acaringi, bhu, chwhite, crwood, ddepaula, debarbos, dfreiber, dhoward, drow, dvlasenk, ezulian, hkrzesin, jarod, jburrell, jfaracco, jferlan, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, kernel-mgr, lgoncalv, lleshchi, lzampier, nmurray, ptalbert, qzhao, rogbas, rvrbovsk, scweaver, tyberry, vkumar, vmalik, walters, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in libbpf. When there are no program sections, obj->programs is left unallocated, causing a NULL pointer dereference in the following access to prog->sec_idx in find_prog_by_sec_insn. A local user could use this flaw to cause a denial of service.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-01-07 18:00:39 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:	2155222, 2155223, 2155224, 2155225, 2155227, 2155228, 2155229, 2155230
Bug Blocks:	2136147

Description Mauro Matteo Cascella 2022-12-20 11:21:36 UTC

A NULL pointer dereference issue was found in libbpf. When there are no program sections, obj->programs is left unallocated, and find_prog_by_sec_insn()'s search lands on &obj->programs[0] == NULL, and will cause a NULL pointer dereference in the following access to prog->sec_idx.

Upstream patch & commit:
https://lore.kernel.org/bpf/20221012022353.7350-4-shung-hsi.yu@suse.com/
https://github.com/torvalds/linux/commit/d0d382f95a9270dcf803539d6781d6bd67e3f5b2

Comment 1 Mauro Matteo Cascella 2022-12-20 13:12:49 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2155222]


Created libbpf tracking bugs for this issue:

Affects: fedora-all [bug 2155228]

Comment 5 Product Security DevOps Team 2023-01-07 18:00:36 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-2022-3606