Home/CVE/The ssh_agent_channel_data function in PuTTY before 0.68 allows remote attackers to have unspecified impact via a large
CVE

CVE-2017-6542

The ssh_agent_channel_data function in PuTTY before 0.68 allows remote attackers to have unspecified impact via a large

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.

CRITICAL · CVSS 9.8 EPSS 0.30634
Act now
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 3% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
▤

Affected Products & Versions

3
putty<= 0.67
opensuse leapall versions
opensuse project leapall versions
⚠

Public Exploits & PoCs

2
dosPuTTY < 0.68 - 'ssh_agent_channel_data' Integer Overflow Heap Corruptionverified
pocwww.exploit-db.com · 42137www.exploit-db.com
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.0 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD27 Mar 2017 · 05:59 PM
CVSS VectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

1
suse-csafopenSUSE-SU-2024:11201-1
🔗

References & Sources

7
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
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.htmlPatchVendor Advisory
http://www.securityfocus.com/bid/97156Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1038067
https://git.tartarus.org/?p=simon/putty.git
https://security.gentoo.org/glsa/201703-03Third Party AdvisoryVDB Entry
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