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Fencer Vulns
critical 10.0

CVE-2004-1008 json

Integer signedness error in the ssh2_rdpkt function in PuTTY before 0.56 allows remote attackers to execute arbitrary code via a SSH2_MSG_D…

published 2004-12-01 21 y ago modified 2026-06-16 4 mo ago also EUVD-2004-1006

cvss
10.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
7.4%
EPSS 7.4% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

Integer signedness error in the ssh2_rdpkt function in PuTTY before 0.56 allows remote attackers to execute arbitrary code via a SSH2_MSG_DEBUG packet with a modified stringlen parameter, which leads to a buffer overflow.

Patch / fix

  • putty Debian 14, Debian 13, Debian 12 0.56-1

debian advisories DEBIAN-CVE-2004-1008

Exploit prediction

7.36% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.