Bug 1954383 (CVE-2020-7731)

Summary:	CVE-2020-7731 russellhaering/gosaml2: Null pointer dereference via malformed XML signatures allows for denial of service
Product:	[Other] Security Response	Reporter:	Sam Fowler <sfowler>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
Target Milestone:	---
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:	2021-05-04 10:46:36 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:
Bug Blocks:	1954384

Description Sam Fowler 2021-04-28 04:16:10 UTC

Affected versions of github.com/russellhaering/gosaml2 are vulnerable to Denial of Service (DoS). There is a crash on nil-pointer dereference caused by sending malformed XML signatures.


References:

https://github.com/russellhaering/gosaml2/issues/59
https://stevenjohnstone.net/posts/snyk/

Comment 1 Sam Fowler 2021-05-04 06:00:53 UTC

Mitigated by fix in dependency gosaml2's dependency, github.com/beevik/etree:

https://github.com/beevik/etree/commit/4a2f8b9d084c5fffa2fe44a73bd8efaf7dcda53a

Comment 4 Sam Fowler 2021-05-04 06:05:29 UTC

External Reference:

https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMRUSSELLHAERINGGOSAML2-608302

Comment 5 Product Security DevOps Team 2021-05-04 10:46:36 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-2020-7731