Bug 2043383 (CVE-2021-45940)

Summary:	CVE-2021-45940 libbpf: heap-based buffer overflow (4 bytes) in __bpf_object__open
Product:	[Other] Security Response	Reporter:	Sandipan Roy <saroy>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	ckalina
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. The vulnerability occurs due to incorrect handling of memory in the __bpf_object__open function and leads to a heap-buffer-overflow. This flaw allows an attacker to execute unauthorized code or commands, read memory, or modify memory.	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:	2043384, 2051966, 2051967
Bug Blocks:	2043392

Description Sandipan Roy 2022-01-21 07:01:56 UTC

libbpf 0.6.0 and 0.6.1 has a heap-based buffer overflow (4 bytes) in __bpf_object__open (called from bpf_object__open_mem and bpf-object-fuzzer.c).

Ref: 
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=40868
https://bugzilla.suse.com/1194248

Comment 1 Sandipan Roy 2022-01-21 07:02:12 UTC

Created libbpf tracking bugs for this issue:

Affects: fedora-all [bug 2043384]