Multiple vulnerabilities have been found in libgadu, a library for
handling Gadu-Gadu instant messaging protocol. It is a part of ekg, a
Gadu-Gadu client, but is widely used in other clients. Also some of the
user contributed scripts were found to behave in an insecure manner.
Bugs fixed in ekg-1.6rc3:
- integer overflow in libgadu (CAN-2005-1852) that could be triggered by
an incomming message and lead to application crash and/or remote code
execution (discovered by Marcin Ślusarz),
Bugs fixed in ekg-1.6rc2:
- insecure file creation in user contributed Python script
(CAN-2005-1916, discovered by Eric Romang of ZATAZ audit),
- insecure file creation (CAN-2005-1850) and shell command injection
(CAN-2005-1851) in other user contributed scripts (discovered by
Marcin Owsiany and Wojtek Kaniewski),
- several signedness errors in libgadu that could be triggered by an
incomming network data or an application passing invalid user input to
the library (discovered by Grzegorz Jaśkiewicz),
- memory alignment errors in libgadu that could be triggered by an
incomming message and lead to bus errors on architectures like SPARC
(discovered by Szymon Zygmunt and Michał Bartoszkiewicz),
- endianness errors in libgadu that could cause invalid behaviour of
applications on big-endian architectures (discovered by Marcin
Ślusarz).
Update is *strongly* recommended. The current version of ekg (including
fixed libgadu) can be downloaded from:
http://dev.null.pl/ekg/ekg-1.6rc3.tar.gz
Note that due to frequent protocol modifications that require API and
ABI changes, several Gadu-Gadu clients include libgadu in their source
trees and use it as a static library. If you use Gadu-Gadu client based
on libgadu other than ekg, please consult your vendor whether an update
is necessary.
Regards,
Wojtek Kaniewski
