Bug 1890964 (CVE-2020-13132)

Summary:	CVE-2020-13132 yubico-piv-tool: incorrect free() in the ykpiv_util_generate_key() in lib/util.c through incorrect error handling code could result in DoS
Product:	[Other] Security Response	Reporter:	Michael Kaplan <mkaplan>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	jjelen, orion
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-28 05:27:35 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:	1890965
Bug Blocks:

Description Michael Kaplan 2020-10-23 12:10:44 UTC

An issue was discovered in Yubico libykpiv before 2.1.0. An attacker can trigger an incorrect free() in the ykpiv_util_generate_key() function in lib/util.c through incorrect error handling code. This could be used to cause a denial of service attack.

Comment 1 Michael Kaplan 2020-10-23 12:10:49 UTC

External References:

https://blog.inhq.net/posts/yubico-libykpiv-vuln/
https://www.yubico.com/support/security-advisories/ysa-2020-02/

Comment 2 Michael Kaplan 2020-10-23 12:11:09 UTC

Created yubico-piv-tool tracking bugs for this issue:

Affects: fedora-31 [bug 1890965]