CVE-2017-6542 EXPLOIT
9.8
CRITICAL · CVSS 3.0 · EPSS 21.8% (pctl 98)
Patch early
A public exploit exists.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 21.82% — more likely to be exploited than 98% of all CVEs |
| Weakness | CWE-119 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2017-03-27 |
| Last modified | 2026-06-17 |
Affected (3)
| Vendor | Product |
|---|---|
| opensuse | leap |
| opensuse project | leap |
| putty | putty |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | PuTTY < 0.68 - 'ssh_agent_channel_data' Integer Overflow Heap Corruption | 2017-06-07 |
References
- http://lists.opensuse.org/opensuse-updates/2017-03/msg00055.html
- http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-agent-fwd-overflow.html
- http://www.securityfocus.com/bid/97156
- http://www.securitytracker.com/id/1038067
- https://git.tartarus.org/?p=simon/putty.git%3Ba=commitdiff%3Bh=4ff22863d895cb7ebfced4cf923a012a614adaa8
- https://security.gentoo.org/glsa/201703-03
- https://security.gentoo.org/glsa/201706-09
- https://www.exploit-db.com/exploits/42137/
- http://lists.opensuse.org/opensuse-updates/2017-03/msg00055.html
- http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-agent-fwd-overflow.html
- http://www.securityfocus.com/bid/97156
- http://www.securitytracker.com/id/1038067
- https://git.tartarus.org/?p=simon/putty.git%3Ba=commitdiff%3Bh=4ff22863d895cb7ebfced4cf923a012a614adaa8
- https://security.gentoo.org/glsa/201703-03
- https://security.gentoo.org/glsa/201706-09
- https://www.exploit-db.com/exploits/42137/
→ the Explorer · watch your stack · NVD