Updated ucd-snmp packages are now available for Red Hat Linux 6.2, 7, 7.1, and 7.
A problem exists in all versions of OpenLDAP from 2.0.0 through 2.0.19 where permissions are not properly checked using access control lists when a user tries to remove an attribute from an object in the directory by replacing it's values with an empty list. Schema checking is still enforced, so a user can only remove attributes that the schema does not require the object to possess.
Zenith Parsec discovered a security hole in Taylor UUCP 1.06.1. It permits a local user to copy any file to anywhere which is writable by the uucp uid, which effectively means that a local user can completely subvert the UUCP subsystem, including stealing mail, etc.
zen-parse discovered an exploitable buffer overflow in groff's preprocessor. If groff is invoked using the LPRng printing system, an attacker can gain rights as the "lp" user. Likewise, this may be remotely exploitable if lpd is running and remotely accessible and the attacker knows the name of the printer and it's spool file.
This updated at package fixes two minor problems and one major problem where the environment can get wiped out prior to the execution of a scheduled command. For versions of Red Hat Linux prior to 7.2, this package also fixes a potential security vulnerability which can result in heap corruption (Red Hat Linux 7.2 is not vulnerable to this security exploit). Update 2002-02-01: The package for Red Hat Linux 6.2 tried to source a file in /etc/init.d, which doesn't exist on a standard system.
Nicolas Boullis found some security problems in the wmtv package (a dockable video4linux TV player for windowmaker) which is distributed in Debian GNU/Linux 2.2. With the current version of wmtv, the configuration file is written back as the superuser, and without any further checks. A mailicious user might use that to damage important files
New telnet, telnet-server packages are available for Red Hat Linux 5.2, 6.2, 7.0 and 7.1. These packages fix a problem where buffer overflows can provide root access to local users. It is recommended that all users update to the fixed packages. [2002-02-06] New packages are available for Red Hat Linux 7.0 and 7.1. These fix issues when upgrading from the errata telnet packages released for previous releases. No code changes are involved.
In Debian Security Advisory DSA-106-1 we reported a exploitable problem in rsync. For details please see that advisory.
There are two problems with the gzip archiving program; the first is a crash when an input file name is over 1020 characters, and the second is a buffer overflow that could be exploited if gzip is run on a server such as an FTP server. The patch applied is from the gzip developers and the problems have been fixed in the latest beta.
New rsync packages are available; these fix a remotely exploitable problem in the I/O functions. These include the security patch from the recently released rsync-
Basically, this is the same Security Advisory as DSA 072-1, but for jgroff instead of groff. The package jgroff contains a version derived from groff that has japaneze character sets enabled. This package is available only in the stable release of Debian, patches for japanese support have been merged into the main groff package.
The enscript program does not create temporary files in a secure fashion and as such could be abused if enscript is run as root.
Sebastian Krahmer of the SuSE Security Team performed an audit on the rsync tool and discovered that in several places signed and unsigned numbers were mixed, with the end result being insecure code. These flaws could be abused by remote users to write 0 bytes into rsync's memory and trick rsync into executing arbitrary code on the server. It is recommended that all Mandrake Linux users update rsync immediately. As well, rsync server administrators should seriously consider making use of the "use chroot", "read only", and "uid" options as these can significantly reduce the impact that security problems in rsync (or elsewhere) have on the server.
Sebastian Krahmer found several places in rsync (a popular tool to synchronise files between machines) where signed and unsigned numbers were mixed which resulted in insecure code. This could be abused by remote users to write 0-bytes in rsync's memory and trick rsync into executing arbitrary code.
The rsync program allows users and administrators to synchronize files and whole directory structures on different machines. It is common practise to allow remote users to mirror ftp servers via anonymous rsync access. There exist several signedness bugs within the rsync program which allow remote attackers to write 0-bytes to almost arbitrary stack-locations, therefore being able to control the programflow and obtaining a shell remotely. These bugs have been fixed.
A security vunlerability in the Linux CIPE (VPN tunnel) implementation has been fixed.
Updated OpenLDAP packages are now available for Red Hat Linux 7, 7.1, and 7.
This updated at package fixes two minor problems and one major problem where the environment can get wiped out prior to the execution of a scheduled command. For versions of Red Hat Linux prior to 7.2, this package also fixes a potential security vulnerability which can result in heap corruption (Red Hat Linux 7.2 is not vulnerable to this security exploit).
A problem exists in the jmcce program that is used for Chinese text on the console. jmcce is installed setuid root and places log files in /tmp; because jmcce does not perform suitable checking on the files it writes to and because it uses a predictable logfile name, an attacker could exploit this to arbitrarily overwrite any file on the system.
New packages are now available to address security issues with the at scheduler program (found in Slackware 8.0's bin.tgz package), sudo, and xchat.