- ------------------------------------------------------------------------ Debian Security Advisory DSA-009-1 security@debian.org Debian -- Security Information Wichert Akkerman December 25, 2000 - ------------------------------------------------------------------------ Package : stunnel Problem type : insecure file handling, format string bug Debian-specific: no Lez discovered a format string problem in stunnel (a tool to create Universal SSL tunnel for other network daemons). Brian Hatch responded by stating he was already preparing a new release with multiple security fixes: 1. the PRNG (pseudo-random generated) was not seeded correctly. This only affects operation on operating systems without a secure random generator (like Linux) 2. Pid files were not created securely, making stunnel vulnerable to a symlink attack 3. There was an insecure syslog() call which could be exploited if the user could manage to insert text into the logged text. At least one way to exploit this using faked identd responses was demonstrated by Lez. These problems have been fixed in version 3.10-0potato1. wget url will fetch the file for you dpkg -i file.deb will install the referenced file. Debian GNU/Linux 2.2 alias potato - --------------------------------- Potato was released for alpha, arm, i386, m68k, powerpc and sparc. At this moment no fix is available for arm, Once a fix for that architecture will become available it will be announced on Debian -- Security Information Source archives: MD5 checksum: 60d5aa858f0a06c2d419da3cf082edfd MD5 checksum: 0cc18707e34df76f50ca1f8d3c4faeaa MD5 checksum: eca047987da225a6e4e7bd705a81f2aa Alpha architecture: MD5 checksum: 832ad31f899dbc655b1796b56cb98c80 Intel ia32 architecture: MD5 checksum: b64009319600749c58c60d39874db79d Motorola 680x0 architecture: MD5 checksum: 89c199d09858d14c9563522f4f6fba67 PowerPC architecture: MD5 checksum: cd145736ba23c54f98a41afe7bb5469f Sun Sparc architecture: MD5 checksum: 12d12072d96e1ddc6caa50cbc179619f These files will be moved into soon. For not yet released architectures please refer to the appropriate directory . - --