CVE-2013-4206
EPSS 1.1%putty - several
Published: 8/19/2013Modified: 4/28/2026
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.
Affected packages (3)
- Debian/filezillafrom 0, < 3.7.3-1
- Debian/puttyfrom 0, < 0.63-1
- Debian/puttyfrom 0, < 0.60+2010-02-20-1+squeeze2