Gentoo Linux Advisories: socat, krb5

http://security.gentoo.org/

Severity: Normal
Title: socat: Format string vulnerability
Date: October 25, 2004
Bugs: #68547
ID: 200410-26

Synopsis

socat contains a format string vulnerability that can potentially lead to remote or local execution of arbitrary code with the privileges of the socat process.

Background

socat is a multipurpose bidirectional relay, similar to netcat.

Affected packages

Description

socat contains a syslog() based format string vulnerablility in the '_msg()' function of 'error.c'. Exploitation of this bug is only possible when socat is run with the '-ly' option, causing it to log messages to syslog.

Impact

Remote exploitation is possible when socat is used as a HTTP proxy client and connects to a malicious server. Local privilege escalation can be achieved when socat listens on a UNIX domain socket. Potential execution of arbitrary code with the privileges of the socat process is possible with both local and remote exploitations.

Workaround

Disable logging to syslog by not using the '-ly' option when starting socat.

Resolution

All socat users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">net-misc/socat-1.4.0.3"

References

[ 1 ] socat Security Advisory

http://www.dest-unreach.org/socat/advisory/socat-adv-1.html

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200410-26.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at http://bugs.gentoo.org.

License

Copyright 2004 Gentoo Foundation, Inc; referenced text belongs to its owner(s).

The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/1.0

http://security.gentoo.org/

Severity: Normal
Title: MIT krb5: Insecure temporary file use in send-pr.sh
Date: October 25, 2004
Bugs: #66359
ID: 200410-24

Synopsis

The send-pr.sh script, included in the mit-krb5 package, is vulnerable to symlink attacks, potentially allowing a local user to overwrite arbitrary files with the rights of the user running the utility.

Background

MIT krb5 is the free implementation of the Kerberos network authentication protocol written by the Massachusetts Institute of Technology.

Affected packages

Description

The send-pr.sh script creates temporary files in world-writeable directories with predictable names.

Impact

A local attacker could create symbolic links in the temporary files directory, pointing to a valid file somewhere on the filesystem. When send-pr.sh is called, this would result in the file being overwritten with the rights of the user running the utility, which could be the root user.

Workaround

There is no known workaround at this time.

Resolution

All MIT krb5 users should upgrade to the latest version:

    # emerge sync
    # emerge -pv ">=app-crypt/mit-krb5-1.3.4-r1"
    # emerge ">=app-crypt/mit-krb5-1.3.4-r1"

References

[ 1 ] CAN-2004-0971

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0971

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200410-24.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at http://bugs.gentoo.org.

License

Copyright 2004 Gentoo Foundation, Inc; referenced text belongs to its owner(s).

The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/1.0