Mandrake alert: Updated wu-ftpd packages fix remote root vulnerability
A vulnerability was discovered by Janusz Niewiadomski and Wojciech Purczynski in the wu-ftpd FTP server package. They found an off-by- one bug in the fb_realpath() function which could be used by a remote attacker to obtain root privileges on the server. This bug can only be successfully accomplished by using wu-ftpd binaries compiled on Linux 2.0.x and later 2.4.x kernels because the 2.2.x and earlier 2.4.x kernels define PATH_MAX to be 4095 characters.
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Mandrake Linux Security Update Advisory
Package name: wu-ftpd
Advisory ID: MDKSA-2003:080
Date: July 31st, 2003
Affected versions: 8.2
A vulnerability was discovered by Janusz Niewiadomski and Wojciech
Purczynski in the wu-ftpd FTP server package. They found an off-by-
one bug in the fb_realpath() function which could be used by a
remote attacker to obtain root privileges on the server. This bug
can only be successfully accomplished by using wu-ftpd binaries
compiled on Linux 2.0.x and later 2.4.x kernels because the 2.2.x
and earlier 2.4.x kernels define PATH_MAX to be 4095 characters.
wu-ftpd is no longer shipped with Mandrake Linux, however Mandrake
Linux 8.2 did come with wu-ftpd. If you use wu-ftpd, you are
encouraged to upgrade to these patched packages.
Mandrake Linux 8.2:
Mandrake Linux 8.2/PPC:
Bug IDs fixed (see https://qa.mandrakesoft.com for more information):
To upgrade automatically, use MandrakeUpdate or urpmi. The verification
of md5 checksums and GPG signatures is performed automatically for you.
A list of FTP mirrors can be obtained from:
All packages are signed by MandrakeSoft for security. You can obtain
the GPG public key of the Mandrake Linux Security Team by executing:
gpg --recv-keys --keyserver http://www.mandrakesecure.net 0x22458A98
Please be aware that sometimes it takes the mirrors a few hours to
You can view other update advisories for Mandrake Linux at:
MandrakeSoft has several security-related mailing list services that
anyone can subscribe to. Information on these lists can be obtained by
If you want to report vulnerabilities, please contact
Type Bits/KeyID Date User ID
pub 1024D/22458A98 2000-07-10 Linux Mandrake Security Team
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