USN-984-1: LFTP vulnerability

Releases

• Ubuntu 10.04
• Ubuntu 9.10
• Ubuntu 9.04
• Ubuntu 8.04

Packages

• lftp -

Details

It was discovered that LFTP incorrectly filtered filenames suggested
by Content-Disposition headers. If a user or automated system were tricked
into downloading a file from a malicious site, a remote attacker could
create the file with an arbitrary name, such as a dotfile, and possibly run
arbitrary code.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 9.10

• lftp - 3.7.15-1ubuntu2.1

Ubuntu 9.04

• lftp - 3.7.8-1ubuntu0.1

Ubuntu 8.04

• lftp - 3.6.1-1ubuntu0.1

Ubuntu 10.04

• lftp - 4.0.2-1ubuntu0.1

In general, a standard system update will make all the necessary changes.

ATTENTION: This update changes previous behaviour by ignoring the filename
supplied by servers in Content-Disposition headers. To re-enable previous
behaviour, use the new xfer:auto-rename setting.

References

• CVE-2010-2251