| Name | CVE-2013-4207 |
| 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SuSE, Mageia, GitHub code/issues, web search, more) |
| References | DSA-2736-1 |
| NVD severity | medium (attack range: remote) |
| Debian Bugs | 719070 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| filezilla (PTS) | wheezy | 3.5.3-2 | vulnerable |
| jessie | 3.9.0.5-1 | fixed | |
| stretch | 3.20.0-1 | fixed | |
| sid | 3.21.0-2 | fixed | |
| putty (PTS) | wheezy (security), wheezy | 0.62-9+deb7u3 | fixed |
| jessie (security), jessie | 0.63-10+deb8u1 | fixed | |
| stretch, sid | 0.67-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| filezilla | source | (unstable) | 3.7.3-1 | low | 719070 | |
| putty | source | (unstable) | 0.63-1 | medium | ||
| putty | source | squeeze | 0.60+2010-02-20-1+squeeze2 | medium | DSA-2736-1 | |
| putty | source | wheezy | 0.62-9+deb7u1 | medium | DSA-2736-1 |
[squeeze] - filezilla <no-dsa> (Minor issue)
[wheezy] - filezilla <no-dsa> (Minor issue)
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-bignum-division-by-zero.html