DHCP client daemon dhcpcd .info file command execution
| dhcpcd-info-execute-commands (10663) |  High Risk |
Description:
dhcpcd could allow a remote attacker to execute arbitrary commands on the system, caused by a vulnerability in the .info file. dhcpcd fails to properly filter shell metacharacters. A remote attacker in control of a malicious DHCP server could supply a specially-crafted command to the vulnerable dhcpcd client to execute arbitrary commands on the system with root privileges.
Platforms Affected:
- Debian, Debian Linux 2.2
- Gentoo, Linux
- MandrakeSoft, Mandrake Linux 7.2
- MandrakeSoft, Mandrake Linux 8.0
- MandrakeSoft, Mandrake Linux 8.1
- MandrakeSoft, Mandrake Linux 8.2
- MandrakeSoft, Mandrake Linux 9.0
- MandrakeSoft, Mandrake Multi Network Firewall 8.2
- MandrakeSoft, Mandrake Single Network Firewall 7.2
- PhysTech, dhcpcd prior to 1.3.22-p12
Remedy:
Upgrade to the latest version of dhcpcd (1.3.22-p13 or later), available from the dhcpcd Download Web page. See References.
For Debian GNU/Linux:
Upgrade to the latest dhcpcd package, as listed below. Refer to DSA-219-1 for more information. See References.
Debian GNU/Linux 2.2 (potato): 1.3.17pl2-8.1 or later
For Gentoo Linux:
Upgrade versions net-misc/dhcpcd-1.3.20_p0-r1 or earlier, as listed in Gentoo Linux Security Announcement 200301-3 See References.
For Mandrake Linux:
Upgrade to the latest dhcpcd package, as listed below. Refer to MandrakeSoft Security Advisory MDKSA-2001:003:dhcpcd for more information. See References.
Mandrake Linux 7.2, 8.0, 8.1, 8.2, 9.0, Multi Network Firewall 8.2, and Single Network Firewall 7.2: 1.3.22pl4-1.1mdk or later
For other distributions:
Contact your vendor for upgrade or patch information.
Consequences:
Gain Access
References:
- Conectiva Linux Announcement CLSA-2002:549, Characters expansion vulnerability at http://distro.conectiva.com/atualizacoes/?id=a&anuncio=000549.
- dhcpcd changelog Web site, http://www.phystech.com/download/dhcpcd_changelog.html at http://www.phystech.com/download/dhcpcd_changelog.html.
- dhcpcd Download Web site, dhcpcd-1.3 at http://www.phystech.com/download/dhcpcd.html.
- Gentoo Linux Security Announcement 200301-3, dhcpcd -- remote command execution at http://www.linuxsecurity.com/content/view/104477/104/.
- BID-6200: DHCPCD Character Expansion Remote Command Execution Vulnerability
- CVE-2002-1403: dhcpcd DHCP client daemon 1.3.22 and earlier allows local users to execute arbitrary code via shell metacharacters that are fed from a dhcpd .info script into a .exe script.
- DSA-219: dhcpcd -- remote command execution
- MDKSA-2003:003: Updated dhcpcd packages fix character expansion vulnerability
Reported:
Nov 18, 2002
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