Mandrake Linux Advisory: dhcp (Update for Single Network Firewall 7.2)
May 30, 2002, 21:58 (0 Talkback[s])
Mandrake Linux Security Update Advisory
Package name: dhcp
Advisory ID: MDKSA-2002:037-1
Date: May 30th, 2002
Original Advisory Date: May 29th, 2002
Affected versions: Single Network Firewall 7.2
Fermin J. Serna discovered a problem in the dhcp server and client
package from versions 3.0 to 3.0.1rc8, which are affected by a format
string vulnerability that can be exploited remotely. By default, these
versions of DHCP are compiled with the dns update feature enabled,
which allows DHCP to update DNS records. The code that logs this
update has an exploitable format string vulnerability; the update
message can contain data provided by the attacker, such as a hostname.
A successful exploitation could give the attacker elevated privileges
equivalent to the user running the DHCP daemon, which is the user dhcpd
in Mandrake Linux 8.x, but root in earlier versions.
The packages previously provided for SNF7.2 were the incorrect version.
These new packages provide the proper version of dhcpd for SNF7.2.
Single Network Firewall 7.2:
Bug IDs fixed (see https://qa.mandrakesoft.com for more information):
To upgrade automatically, use MandrakeUpdate. The verification of md5
checksums and GPG signatures is performed automatically for you.
If you want to upgrade manually, download the updated package from one
of our FTP server mirrors and upgrade with "rpm -Fvh *.rpm". A list of
FTP mirrors can be obtained from:
Please verify the update prior to upgrading to ensure the integrity of
the downloaded package. You can do this with the command:
rpm --checksig <filename>
All packages are signed by MandrakeSoft for security. You can obtain
the GPG public key of the Mandrake Linux Security Team from:
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