Bug 2221284 (CVE-2021-32495)

Summary:	CVE-2021-32495 radare2: Use after free vulnerability in pyc parser's get_none_object function
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	rebus
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	radare2 5.3.0-git 26255	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-07-07 22:46:49 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:	2221285, 2221286
Bug Blocks:

Description Pedro Sampaio 2023-07-07 18:24:10 UTC

Radare2 has a use-after-free vulnerability in pyc parser's get_none_object function. Attacker can read freed memory afterwards. This will allow attackers to cause denial of service.

References:

https://github.com/radareorg/radare2/issues/18666
https://github.com/radareorg/radare2/commit/5e16e2d1c9fe245e4c17005d779fde91ec0b9c05

Comment 1 Pedro Sampaio 2023-07-07 18:24:26 UTC

Created radare2 tracking bugs for this issue:

Affects: epel-all [bug 2221286]
Affects: fedora-all [bug 2221285]

Comment 2 Product Security DevOps Team 2023-07-07 22:46:48 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.

Comment 3 Michal Ambroz 2023-10-26 11:20:14 UTC

https://github.com/radareorg/radare2/commit/5e16e2d1c9fe245e4c17005d779fde91ec0b9c05
fixed since release 5.3.0