CVE-2017-6542
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
02 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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 21.81% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 97.5% of scored records. A rank, not a probability.
- NVD base score
- 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2017-03-27 17:00Z9 YR AGO
- Last updated
- 2024-08-05 15:33Z2 YR AGO
- Reserved
- 2017-03-08
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass
- Data version
- 5.1
- Document digest
- 5b531b1a7576828d9936d42cf9811f41a2317a0be41822d948a41729296bb532
05 Affected products
06 References
- www.securityfocus.com97156http://www.securityfocus.com/bid/97156
- www.exploit-db.com42137https://www.exploit-db.com/exploits/42137/
- security.gentoo.orgGLSA-201703-03https://security.gentoo.org/glsa/201703-03
- git.tartarus.orghttps://git.tartarus.org/?p=simon/putty.git%3Ba=commitdiff%3Bh=4ff22863d895cb7ebfced4cf923a012a614adaa8
- www.securitytracker.com1038067http://www.securitytracker.com/id/1038067
- www.chiark.greenend.org.ukhttp://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-agent-fwd-overflow.html
- lists.opensuse.orgopenSUSE-SU-2017:0741http://lists.opensuse.org/opensuse-updates/2017-03/msg00055.html
- security.gentoo.orgGLSA-201706-09https://security.gentoo.org/glsa/201706-09
07 Fixed in
Debian 12
- putty Fixed in 0.67-3
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- putty Fixed in 0.67-3
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- putty Fixed in 0.67-3
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- putty Fixed in 0.67-3build0.16.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.