Automounter daemon buffer overflow can lead to remote root access
|amd-bo (3171)||High Risk|
The Automounter daemon (amd) is vulnerable to a buffer overflow in the mount code. The amd daemon responds to attempts to access files by automatically mounting file systems on which those files reside. By passing a long string to the AMQPROC_MOUNT procedure, a remote attacker can overflow the buffer and gain root privileges on the system.
Upgrade to the latest version of amd-utils (6.0.1 or later), as listed in CERT Advisory CA-1999-12. See References.
As a workaround, disable the amd daemon. However, this may prevent your system from operating normally.
For Red Hat Linux 6.0:
Upgrade to the latest version of am-utils (6.01S11-1 or later), as listed in RHSA-1999:032-01. See References.
For Caldera OpenLinux 2.2:
Upgrade to the latest version of am-utils (6.0-7 or later), as listed in Caldera Systems, Inc. Security Advisory CSSA-1999:024.0. See References.
For BSDI (BSD/OS 4.0.1 and 3.1):
Apply the mods M410-017 for 4.0.1 and M310-057 patch, as listed in CERT Advisory CA-99-12. See References.
Upgrade to the latest version of FreeBSD (3.3-RELEASE or later), as listed in FreeBSD, Inc. Security Advisory FreeBSD-SA-99:06. See References.
— OR —
Apply the patch for this vulnerability, as listed in FreeBSD, Inc. Security Advisory FreeBSD-SA-99:06. See References.
For Debian Linux 2.1:
Upgrade to the latest version of amd (upl102-23.slink2 or later), as listed in Debian Security Advisory 19991018a. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
- BSDI Internet Super Server 4.0.1 Mods (patches): BSDI Mod M401-017.
- Caldera International, Inc. Security Advisory CSSA-1999-024.0: buffer overflow in amd.
- CERT Advisory CA-1999-12: Buffer Overflow in amd.
- CIAC Information Bulletin J-071: Buffer Overflow Vulnerability in amd.
- Debian Security Advisory 19991018a: amd: Buffer overflow in amd -- update.
- FreeBSD Security Advisory FreeBSD-SA-99:06: remote amd attack.
- RHSA-1999:032-01: Buffer overrun in amd.
- BID-614: Multiple Vendor amd Buffer Overflow Vulnerability
- CVE-1999-0704: Buffer overflow in Berkeley automounter daemon (amd) logging facility provided in the Linux am-utils package and others.
- OSVDB ID: 159: amd AMQPROC_MOUNT Procedure Remote Overflow
- Compaq Tru64
- Data General DG/UX
- Debian Debian Linux
- FreeBSD FreeBSD
- HP HP-UX
- IBM AIX
- Linux Kernel
- RedHat Linux 4.2
- RedHat Linux 5.2
- RedHat Linux 6.0
- SCO Caldera OpenLinux
- SCO SCO Unix
- SGI IRIX
- Sun Solaris
- Wind River BSDOS
- WindRiver BSDOS 3.1
- WindRiver BSDOS 4.0
- WindRiver BSDOS 4.0.1
Aug 30, 1999
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