Vulnerabilities / CVE-2017-6542

critical

CVE-2017-6542

The ssh_agent_channel_data function in PuTTY before 0.68 allows remote ...

Published Modified CWE 119
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

NVD9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Trivy's own label is CRITICAL. Rated critical by NVD. Rated lower by Ubuntu (medium).

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.

Affected packages and fixed versions

SourcePackageFixed in
alpine 3.2putty0.68-r0
alpine 3.3putty0.68-r0
alpine 3.4putty0.68-r0
alpine 3.5putty0.68-r0
debian 11putty0.67-3
debian 12putty0.67-3
debian 13putty0.67-3
debian 14putty0.67-3
debian 7puttyno fix listed
debian 8puttyno fix listed
echoputty0.67-3
ubuntu 16.04putty0.67-3build0.16.04.1
Show all 13 entries from 13 sources
SourcePackageFixed in
alpine 3.2putty0.68-r0
alpine 3.3putty0.68-r0
alpine 3.4putty0.68-r0
alpine 3.5putty0.68-r0
debian 11putty0.67-3
debian 12putty0.67-3
debian 13putty0.67-3
debian 14putty0.67-3
debian 7puttyno fix listed
debian 8puttyno fix listed
echoputty0.67-3
ubuntu 16.04putty0.67-3build0.16.04.1
ubuntu 16.04-ESMputty0.67-3build0.16.04.1

References

All 10 references

Vulnerability data compiled from the Trivy vulnerability database (trivy-db, Aqua Security, Apache License 2.0), which aggregates third-party advisories. CVE records are published by The MITRE Corporation under the CVE Terms of Use; CVE is a trademark of MITRE. This product uses data from the NVD API but is not endorsed or certified by the NVD. Severity, titles and advisory data from the GitHub Advisory Database (CC BY 4.0), Red Hat security data (CC BY 4.0) and the other sources linked on each entry. Entries may be summarised or re-formatted; the linked original is the authoritative record.