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.
{
"binaries": [
{
"binary_version": "1:2.10.9-0ubuntu3.2",
"binary_name": "finch"
},
{
"binary_version": "1:2.10.9-0ubuntu3.2",
"binary_name": "finch-dev"
},
{
"binary_version": "1:2.10.9-0ubuntu3.2",
"binary_name": "libpurple-bin"
},
{
"binary_version": "1:2.10.9-0ubuntu3.2",
"binary_name": "libpurple-dev"
},
{
"binary_version": "1:2.10.9-0ubuntu3.2",
"binary_name": "libpurple0"
},
{
"binary_version": "1:2.10.9-0ubuntu3.2",
"binary_name": "pidgin"
},
{
"binary_version": "1:2.10.9-0ubuntu3.2",
"binary_name": "pidgin-data"
},
{
"binary_version": "1:2.10.9-0ubuntu3.2",
"binary_name": "pidgin-dev"
}
],
"availability": "No subscription required"
}