Bug 1927426 (CVE-2019-25018)

Summary:	CVE-2019-25018 krb5-appl: Improper directory name validation allows malicious server to bypass access restrictions
Product:	[Other] Security Response	Reporter:	Michael Kaplan <mkaplan>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	fdvorak, nalin, rharwood
Target Milestone:	---	Keywords:	Security
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Hardware:	All
OS:	Linux
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Last Closed:	2021-02-10 22:09:55 UTC	Type:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Bug Depends On:
Bug Blocks:	1927427

Description Michael Kaplan 2021-02-10 17:12:42 UTC

In the rcp client in MIT krb5-appl through 1.0.3, malicious servers could bypass intended access restrictions via the filename of . or an empty filename, similar to CVE-2018-20685 and CVE-2019-7282. The impact is modifying the permissions of the target directory on the client side. NOTE: MIT krb5-appl is not supported upstream. The affected code was removed from the supported MIT Kerberos 5 (aka krb5) product many years ago, at version 1.8.

Comment 1 Michael Kaplan 2021-02-10 17:12:45 UTC

External References:

https://bugzilla.suse.com/show_bug.cgi?id=1131109

Comment 2 Product Security DevOps Team 2021-02-10 22:09:55 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-2019-25018