CVE-2013-4207
EPSS 0.58%
Description
Buffer overflow in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) via an invalid DSA signature that is not properly handled during computation of a modular inverse and triggers the overflow during a division by zero by the bignum functionality, a different vulnerability than CVE-2013-4206.
How to fix CVE-2013-4207
To remediate CVE-2013-4207, upgrade the affected package to a fixed version below.
- Debian/filezilla—upgrade to 3.7.3-1 or later
- Debian/putty—upgrade to 0.63-1 or later
Is CVE-2013-4207 being exploited?
Low — EPSS is 0.6%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 3.7.3-1
- from 0, < 0.63-1