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SuSE alert: sendmail
Cade Cairns of Securityfocus discovered a vulnerability in the sendmail program, the widely spread MTA used in Unix- and Unix-like systems. A local user can write arbitrary data to the process memory, resulting in user-controlled code to be executed as user root. Please note that this is a _local_ vulnerability: Local shell access is needed for the attacker to be able to take advantage of this error. The /usr/sbin/sendmail program is installed set-uid root in most installations. This special privilege is needed for the sendmail program to operate properly. The attack pattern involves running sendmail to make use of the setuid-bit. Please note that this is the first sendmail security problem since 1997.
SuSE alert: adb
Sdbsearch.cgi is Perl script which is part of the sdb package of SuSE Linux was found vulnerable by using untrustworthy client input (HTTP_REFERER). By exploiting this trust an attacker could force the sdbsearch.cgi script to open a malicious keylist file which includes keywords and filenames. By replacing the filename in the keylist file with the Perl pipe followed by arbitrary shell commands the sdbsearch.cgi would execute these commands when trying to open these 'filenames'. Note, that the attacker needs local access to the machine to store the keylist file on the server running sdbsearch.cgi. Misconfigured ftp accounts, trojan tar balls or RPM files could also be used.
SuSE alert: fetchmail
Fetchmail is a tool for retrieving and forwarding mail. Two vulnerabilities in the code of fetchmail were found in the last weeks. 1.) By sending a header with a large "To:" line a buffer overflow will be triggered in the header parsing code. 2.) By impersonating a pop3 or imap server by using DNS spoofing or getting control over the pop3/imap server an attacker could trigger a buffer overflow in the pop3 and imap code of fetchmail. All the attacker has to do is to fake a LIST response message and providing two integers. One will used as index for a stack array and the other one is the value written to this index. Both vulnerabilities could be used to get remote access to the system with the privilege of the user running fetchmail.
Debian alert: telnetd-ssl AYT buffer overflow
This is a followup to the problem described in DSA 075-1. Please read
the original advisory to find out more about the security problem.
This advisory and upload only fixes a problem with binary packages for
sparc that were mistakenly linked to the wrong library.
Debian alert: telnetd-ssl AYT buffer overflow
The telnet daemon contained in the netkit-telnet-ssl_0.16.3-1 package in
the 'stable' (potato) distribution of Debian GNU/Linux is vulnerable to an
exploitable overflow in its output handling.
The original bug was found by <scut@nb.in-berlin.de>, and announced to
bugtraq on Jul 18 2001. At that time, netkit-telnet versions after 0.14 were
not believed to be vulnerable.
On Aug 10 2001, zen-parse posted an advisory based on the same problem, for
all netkit-telnet versions below 0.17.
More details can be found on http://www.securityfocus.com/archive/1/203000 .
As Debian uses the 'telnetd' user to run in.telnetd, this is not a remote
root compromise on Debian systems; the 'telnetd' user can be compromised.
Debian alert: buffer overflow in Window Maker
Alban Hertroys found a buffer overflow in Window Maker (a popular window
manager for X). The code that handles titles in the window list menu did
not check the length of the title when copying it to a buffer. Since
applications will set the title using untrusted data (for example web
browsers will set the title of their window to the title of the web-page
being shown) this could be exploited remotely.
Debian alert: 3 security problems in imp
The Horde team released version 2.2.6 of IMP (a web based IMAP mail
program) which fixes three security problems. Their release announcement
describes them as follows:
Debian alert: groff printf format problem
Zenith Parse found a security problem in groff (the GNU version of
troff). The pic command was vulnerable to a printf format attack
which made it possible to circumvent the -S option and execute
arbitrary code.
Debian alert: netkit-telnet AYT buffer overflow
The telnet daemon contained in the netkit-telnet_0.16-4potato1 package in
the 'stable' (potato) distribution of Debian GNU/Linux is vulnerable to an
exploitable overflow in its output handling.
The original bug was found by <scut@nb.in-berlin.de>, and announced to
bugtraq on Jul 18 2001. At that time, netkit-telnet versions after 0.14 were
not believed to be vulnerable.
On Aug 10 2001, zen-parse posted an advisory based on the same problem, for
all netkit-telnet versions below 0.17.
More details can be found on http://www.securityfocus.com/archive/1/203000 .
As Debian uses the 'telnetd' user to run in.telnetd, this is not a remote
root compromise on Debian systems; the 'telnetd' user can be compromised.
Debian alert: fetchmail remote exploit
Salvatore Sanfilippo found two remotely exploitable problems in
fetchmail while doing a security audit. In both the imap and pop3 code
the input is not verified and used to store a number in an array. Since
no bounds checking is done this can be used by an attacker to write
arbitrary data in memory. An attacker can use this if we can get a user
to transfer mail from a custom imap or pop3 server he controls.
Red Hat alert: New telnet packages available to fix buffer overflow vulnerabilities
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.
Red Hat alert: Updated OpenLDAP packages available for Red Hat Linux 6.2, 7, and 7.1
Updated openldap packages are now available for Red Hat Linux 6.2, 7, and
7.1. These packages include fixes for problems which could allow a
malicious remote user to crash a server.
Debian alert: xloadimage buffer overflow
The version of xloadimage (a graphics files viewer for X) that was
shipped in Debian GNU/Linux 2.2 has a buffer overflow in the code that
handles FACES format images. This could be exploited by an attacker by
tricking someone into viewing a specially crafted image using xloadimage
which would allow him to execute arbitrary code.
Debian alert: OpenLDAP DoS
CERT released their advisory CA-2001-18 which lists a number of
vulnerabilities in various LDAP implementations. based on the
results of the PROTOS LDAPv3 test suite. These tests found one
problem in OpenLDAP, a free LDAP implementation that is shipped
as part of Debian GNU/Linux 2.2.
SuSE alert: xmcd
Cda, a setuid commandline part of xmcd, a X11/Motif audio CD player by Ti Kan <ti@amb.org>, was found vulnerable by a link attack and some bufferoverflows. These bugs could be exploited by an adversary, who has access to the system, to overwrite files or gain higher privileges.
Debian alert: New versions of apache, fixes index bug
We have received reports that the 'apache' http daemon, as included in
the Debian 'stable' distribution, is vulnerable to the 'artificially
long slash path directory listing vulnerability' as described in
http://www.securityfocus.com/vdb/bottom.html?vid=2503 .
SuSE alert: xli/xloadimage
xli, aka xloadimage, a image viewer for X11 is used by Netscape's plugger to display TIFF-, PNG- and Sun-Raster-images. The plugger configuration file is /etc/pluggerrc. Due to missing boundary checks in the xli code a buffer overflow could be triggered by an external attacker to execute commands on the victim's system. An exploit is publically available.
Red Hat alert: New squid packages for Red Hat Linux 7.0
New squid packages are available for Red Hat Linux 7.0 that fix a possible
security problem with Squid's HTTP accelerator feature. If Squid was
configured in accelerator-only mode, it was possible for remote users
to portscan machines through the Squid proxy, potentially allowing for
access to machines not otherwise available.
It is recommended that users who use Squid in accelerator-only mode update
to the fixed packages. Note that Red Hat Linux 7.1 is not affected by this
vulnerability, nor are releases prior to Red Hat Linux 7.0.
Red Hat alert: Updated procmail packages available for Red Hat Linux 5.2, 6.2, 7 and 7.1
Procmail, an autonomous mail processor, as shipped in Red Hat Linux 5.2,
6.2, 7, and 7.1, handles signals unsafely.
Red Hat alert: Updated openssl packages available
Updated openssl packages are now available for Red Hat Linux 6.x and 7.
These packages include security-related changes made in OpenSSL 0.9.6a and
0.9.6b which have been backported to previous versions released for Red Hat
Linux.
In addition, this advisory provides OpenSSL 0.9.6 packages for Red Hat
Linux 7, which may be used by future updates to both Red Hat Linux 7 and
Red Hat Linux 7.1.
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