Ubuntu Security Notice 1500-1 - Evgeny Boger discovered that Pidgin incorrectly handled buddy list messages in the AIM and ICQ protocol handlers. A remote attacker could send a specially crafted message and cause Pidgin to crash, leading to a denial of service. This issue only affected Ubuntu 10.04 LTS, 11.04 and 11.10. Thijs Alkemade discovered that Pidgin incorrectly handled malformed voice and video chat requests in the XMPP protocol handler. A remote attacker could send a specially crafted message and cause Pidgin to crash, leading to a denial of service. This issue only affected Ubuntu 10.04 LTS, 11.04 and 11.10. Various other issues were also addressed.
a749885c45d3ed6a82077ecb3953f73e5275c512532f5583f18a44f27c49d270Red Hat Security Advisory 2011-1821-01 - Pidgin is an instant messaging program which can log in to multiple accounts on multiple instant messaging networks simultaneously. An input sanitization flaw was found in the way the AOL Open System for Communication in Realtime protocol plug-in in Pidgin, used by the AOL ICQ and AIM instant messaging systems, escaped certain UTF-8 characters. A remote attacker could use this flaw to crash Pidgin via a specially-crafted OSCAR message. Multiple NULL pointer dereference flaws were found in the Jingle extension of the Extensible Messaging and Presence Protocol protocol plug-in in Pidgin. A remote attacker could use these flaws to crash Pidgin via a specially-crafted Jingle multimedia message.
8898c9e665950277a124090594f6f201ce5f2d533466d4f40f014414cdf3c633Red Hat Security Advisory 2011-1820-01 - Pidgin is an instant messaging program which can log in to multiple accounts on multiple instant messaging networks simultaneously. An input sanitization flaw was found in the way the AOL Open System for Communication in Realtime protocol plug-in in Pidgin, used by the AOL ICQ and AIM instant messaging systems, escaped certain UTF-8 characters. A remote attacker could use this flaw to crash Pidgin via a specially-crafted OSCAR message. An input sanitization flaw was found in the way the Pidgin SILC protocol plug-in escaped certain UTF-8 characters in channel messages. A remote attacker could use this flaw to crash Pidgin via a specially-crafted SILC message.
46920b2be0ad0a71dc0f6800ddcb5927c42aa93032c295654bdee52801a20d3fMandriva Linux Security Advisory 2011-183 - When receiving various stanzas related to voice and video chat, the XMPP protocol plugin failed to ensure that the incoming message contained all required fields, and would crash if certain fields were missing. When receiving various messages related to requesting or receiving authorization for adding a buddy to a buddy list, the oscar protocol plugin failed to validate that a piece of text was UTF-8. In some cases invalid UTF-8 data would lead to a crash. When receiving various incoming messages, the SILC protocol plugin failed to validate that a piece of text was UTF-8. In some cases invalid UTF-8 data would lead to a crash. This update provides pidgin 2.10.1, which is not vulnerable to these issues.
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