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Security Advisory Updated rxvt packages fix various vulnerabilites

Advisory: RHSA-2003:054-07
Type: Security Advisory
Severity: N/A
Issued on: 2003-03-17
Last updated on: 2003-03-17
Affected Products: Red Hat Linux 6.2
Red Hat Linux 7.0
Red Hat Linux 7.1
Red Hat Linux 7.2
Red Hat Linux 7.3
CVEs (cve.mitre.org): CVE-2003-0022
CVE-2003-0023
CVE-2003-0066

Details

Updated rxvt packages are available which fix a number of vulnerabilities
in the handling of escape sequences.

Rxvt is a color VT102 terminal emulator for the X Window System. A number
of issues have been found in the escape sequence handling of Rxvt.
These could be potentially exploited if an attacker can cause carefully
crafted escape sequences to be displayed on a rxvt terminal being used by
their victim.

One of the features which most terminal emulators support is the ability
for the shell to set the title of the window using an escape sequence.
Certain xterm variants, including rxvt, also provide an escape sequence for
reporting the current window title. This essentially takes the current
title and places it directly on the command line. Since it is not
possible to embed a carriage return into the window title itself, the
attacker would have to convince the victim to hit enter for it to process
the title as a command, although the attacker can perform a number of
actions to increase the likelyhood of this happening.

The "screen dump" feature in rxvt 2.7.8 allows attackers to overwrite
arbitrary files via a certain character escape sequence when it is echoed
to a user's terminal, e.g. when the user views a file containing the
malicious sequence.

The menuBar feature in rxvt 2.7.8 allows attackers to modify menu options
and execute arbitrary commands via a certain character escape sequence that
inserts the commands into the menu.

Users of Rxvt are advised to upgrade to these errata packages which contain
a patch to disable the title reporting functionality and patches to correct
the other issues.

Red Hat would like to thank H D Moore for bringing these issues to our
attention.


Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade. Only those
RPMs which are currently installed will be updated. Those RPMs which are
not installed but included in the list will not be updated. Note that you
can also use wildcards (*.rpm) if your current directory *only* contains the
desired RPMs.

Please note that this update is also available via Red Hat Network. Many
people find this an easier way to apply updates. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

Updated packages

Red Hat Linux 6.2

IA-32:
ftp://updates.redhat.com/rhn/repository/NULL/rxvt/2.7.8-3.6.2.1/i386/rxvt-2.7.8-3.6.2.1.i386.rpm
Missing file
    MD5: 8ce644f8e66b473ef91ea5baa70066ea
 
Red Hat Linux 7.0

SRPMS:
ftp://updates.redhat.com/rhn/repository/NULL/rxvt/2.7.8-3.7.0.1/SRPMS/rxvt-2.7.8-3.7.0.1.src.rpm
Missing file
    MD5: 08bc3ef32e1bc77836dc266af8ef2fa1
 
IA-32:
ftp://updates.redhat.com/rhn/repository/NULL/rxvt/2.7.8-3.7.0.1/i386/rxvt-2.7.8-3.7.0.1.i386.rpm
Missing file
    MD5: b93bc19a8403c72943b33779b44b28fe
 
Red Hat Linux 7.1

IA-32:
ftp://updates.redhat.com/rhn/repository/NULL/rxvt/2.7.8-3.7.1.1/i386/rxvt-2.7.8-3.7.1.1.i386.rpm
Missing file
    MD5: f973a30d1f45f561a1e15d4c58615526
 
Red Hat Linux 7.2

SRPMS:
ftp://updates.redhat.com/rhn/public/2703533/rxvt/18:2.7.8-4/SRPMS/rxvt-2.7.8-4.src.rpm
Missing file
    MD5: f5b4712eeb3c941b9b5f2cf3ab6d6dc4
ftp://updates.redhat.com/rhn/repository/NULL/rxvt/2.7.8-4/SRPMS/rxvt-2.7.8-4.src.rpm
Missing file
    MD5: f5b4712eeb3c941b9b5f2cf3ab6d6dc4
 
IA-32:
ftp://updates.redhat.com/rhn/repository/NULL/rxvt/2.7.8-4/i386/rxvt-2.7.8-4.i386.rpm
Missing file
    MD5: 94a3cbbf0dbd8739e9b1b2cc716a326e
 
IA-64:
ftp://updates.redhat.com/rhn/repository/NULL/rxvt/2.7.8-4/ia64/rxvt-2.7.8-4.ia64.rpm
Missing file
    MD5: 781b84624dda1114d74d09814438c54a
 
Red Hat Linux 7.3

SRPMS:
ftp://updates.redhat.com/rhn/public/2703533/rxvt/18:2.7.8-4/SRPMS/rxvt-2.7.8-4.src.rpm
Missing file
    MD5: f5b4712eeb3c941b9b5f2cf3ab6d6dc4
ftp://updates.redhat.com/rhn/repository/NULL/rxvt/2.7.8-4/SRPMS/rxvt-2.7.8-4.src.rpm
Missing file
    MD5: f5b4712eeb3c941b9b5f2cf3ab6d6dc4
 
IA-32:
ftp://updates.redhat.com/rhn/repository/NULL/rxvt/2.7.8-4/i386/rxvt-2.7.8-4.i386.rpm
Missing file
    MD5: 94a3cbbf0dbd8739e9b1b2cc716a326e
 

References


Keywords

escape, reporting, trojan


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