The (1) bundled GnuTLS SSL/TLS plugin and the (2) bundled OpenSSL SSL/TLS plugin in libpurple in Pidgin before 2.10.10 do not properly consider the Basic Constraints extension during verification of X.509 certificates from SSL servers, which allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate.
| Software | From | Fixed in |
|---|---|---|
| opensuse / opensuse | 12.3 | 12.3.x |
| opensuse / opensuse | 13.1 | 13.1.x |
| opensuse / opensuse | 13.2 | 13.2.x |
| canonical / ubuntu_linux | 12.04 | 12.04.x |
| canonical / ubuntu_linux | 14.10 | 14.10.x |
| canonical / ubuntu_linux | 14.04 | 14.04.x |
| debian / debian_linux | 7.0 | 7.0.x |
| pidgin / pidgin | - | 2.10.9.x |
| pidgin / pidgin | 2.10.1 | 2.10.1.x |
| pidgin / pidgin | 2.10.8 | 2.10.8.x |
| pidgin / pidgin | 2.10.7 | 2.10.7.x |
| pidgin / pidgin | 2.10.2 | 2.10.2.x |
| pidgin / pidgin | 2.10.5 | 2.10.5.x |
| pidgin / pidgin | 2.10.4 | 2.10.4.x |
| pidgin / pidgin | 2.10.0 | 2.10.0.x |
| pidgin / pidgin | 2.10.6 | 2.10.6.x |
| pidgin / pidgin | 2.10.3 | 2.10.3.x |