CVE-2017-6542

Name: CVE-2017-6542
Creator: NVD / NIST
Published: 2017-03-27T17:59:00.85+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 21.82%

Last modified Jun 17, 2026

CVE-2017-6542 is a vulnerability of currently unknown severity. The ssh_agent_channel_data function in PuTTY before 0.68 allows remote attackers to have unspecified impact via a large length value in an agent protocol message and leveraging the ability to connect to the Unix-domain socket representing the forwarded agent connection, which trigger a buffer overflow.. EPSS estimates a 21.82% chance of exploitation in the next 30 days.

Description

The ssh_agent_channel_data function in PuTTY before 0.68 allows remote attackers to have unspecified impact via a large length value in an agent protocol message and leveraging the ability to connect to the Unix-domain socket representing the forwarded agent connection, which trigger a buffer overflow.

Metrics

EPSS Probability

21.82%

97.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Putty	Putty	<= 0.67
Opensuse	Leap	42.2
Opensuse Project	Leap	42.1

References

http://lists.opensuse.org/opensuse-updates/2017-03/msg00055.htmlThird Party Advisory
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-agent-fwd-overflow.htmlPatch, Vendor Advisory
http://www.securityfocus.com/bid/97156Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038067
https://git.tartarus.org/?p=simon/putty.git%3Ba=commitdiff%3Bh=4ff22863d895cb7ebfced4cf923a012a614adaa8
https://security.gentoo.org/glsa/201703-03Third Party Advisory, VDB Entry
https://security.gentoo.org/glsa/201706-09
https://www.exploit-db.com/exploits/42137/
http://lists.opensuse.org/opensuse-updates/2017-03/msg00055.htmlThird Party Advisory
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-agent-fwd-overflow.htmlPatch, Vendor Advisory
http://www.securityfocus.com/bid/97156Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1038067
https://git.tartarus.org/?p=simon/putty.git%3Ba=commitdiff%3Bh=4ff22863d895cb7ebfced4cf923a012a614adaa8
https://security.gentoo.org/glsa/201703-03Third Party Advisory, VDB Entry
https://security.gentoo.org/glsa/201706-09
https://www.exploit-db.com/exploits/42137/

Timeline

Published: Mar 27, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-6542?

How severe is CVE-2017-6542?

Severity scoring for CVE-2017-6542 is pending analysis. The EPSS model estimates a 21.82% probability of exploitation in the next 30 days.

How do I fix CVE-2017-6542?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-6542?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST