Bug 1431716 (CVE-2017-6542)

Summary:	CVE-2017-6542 putty: Integer overflow in the ssh_agent_channel_data
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	carnil, fedora, jskarvad, olysonek, sardella, tremble
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	putty 0.68	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 03:08:56 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:	1431718, 1431719, 1431720
Bug Blocks:

Description Andrej Nemec 2017-03-13 16:14:12 UTC

It was found that putty is vulnerable to an integer overflow. An attacker could overwrite the heap data with his own if the system has SSH agent forwarding and he is able to connect to the Unix-domain socket representing the forwarded agent connection.

Upstream patch:

https://git.tartarus.org/?p=simon/putty.git;a=commitdiff;h=4ff22863d895cb7ebfced4cf923a012a614adaa8

References:

http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-agent-fwd-overflow.html

Comment 1 Andrej Nemec 2017-03-13 16:14:53 UTC

Created putty tracking bugs for this issue:

Affects: epel-5 [bug 1431718]
Affects: epel-6 [bug 1431719]
Affects: fedora-all [bug 1431720]

Comment 2 Product Security DevOps Team 2019-06-08 03:08:56 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.