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CVE-2017-6542

Published: Mar 27, 2017Updated: May 13, 2026 Sources: CVE List NVDCWE-119
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
21.8%
Top 2.7%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-119

Affected Products

puttyputty
Mixed
Consumer Software / file-utility
leapopensuse
On-premOS
Operating Systems / linux-distro
leapopensuse project
On-premOS
Operating Systems / linux-distro
n/an/a
puttyoss-projectConsumer Software
opensuseoss-projectDEOperating Systemsaka opensuse
opensuse projectoss-projectDEOperating Systemsaka opensuse, opensuse

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

http://lists.opensuse.org/opensuse-updates/2017-03/msg00055.html
lists.opensuse.org
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-agent-fwd-overflow.html
chiark.greenend.org.uk
http://www.securityfocus.com/bid/97156
securityfocus.com
and 5 more references View all →

Timeline

Published
Mar 27, 2017
Last Updated
May 13, 2026

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