CVE-2013-4206
putty - several
EPSS 1.1%
Description
Heap-based buffer underflow in the modmul function in sshbn.c in PuTTY before 0.63 allows remote SSH servers to cause a denial of service (crash) and possibly trigger memory corruption or code execution via a crafted DSA signature, which is not properly handled when performing certain bit-shifting operations during modular multiplication.
How to fix CVE-2013-4206
To remediate CVE-2013-4206, 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
- —upgrade to 0.60+2010-02-20-1+squeeze2 or later
Is CVE-2013-4206 being exploited?
Low — EPSS is 1.1%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 3.7.3-1
- from 0, < 0.63-1
- from 0, < 0.60+2010-02-20-1+squeeze2