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TITLE:
Pidgin Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA35194

VERIFY ADVISORY:
http://secunia.com/advisories/35194/

DESCRIPTION:
Some vulnerabilities and weaknesses have been reported in Pidgin,
which can be exploited by malicious people to cause a DoS (Denial of
Service) or to potentially compromise a user's system.

1) A truncation error in the processing of MSN SLP messages can be
exploited to cause a buffer overflow.

This is related to:
SA30971

2) A boundary error in the XMPP SOCKS5 "bytestream" server when
initiating an outgoing file transfer can be exploited to cause a
buffer overflow. 

Successful exploitation of vulnerabilities #1 and #2 may allow
execution of arbitrary code.

3) A boundary error exists in the implementation of the
"PurpleCircBuffer" structure. This can be exploited to corrupt memory
and cause a crash via specially crafted XMPP or Sametime packets.

4) A boundary error in the "decrypt_out()" function can be exploited
to cause a stack-based buffer overflow with 8 bytes and crash the
application via a specially crafted QQ packet.

The vulnerabilities are reported in versions prior to 2.5.6.

SOLUTION:
Update to version 2.5.6.

PROVIDED AND/OR DISCOVERED BY:
The vendor credits:
2) Veracode
3) Josef Andrysek
4) Ka-Hing Cheung

ORIGINAL ADVISORY:
http://www.pidgin.im/news/security/?id=29
http://www.pidgin.im/news/security/?id=30
http://www.pidgin.im/news/security/?id=31
http://www.pidgin.im/news/security/?id=32

OTHER REFERENCES:
SA30971:
http://secunia.com/advisories/30971/

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