drucken bookmarks versenden konfigurieren admin pdf Sicherheit: Unsichere Verwendung temporärer Dateien in openssl und groff
Name: |
Unsichere Verwendung temporärer Dateien in openssl und groff
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ID: |
200411-15 |
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Distribution: |
Gentoo |
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Plattformen: |
Keine Angabe |
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Datum: |
Di, 9. November 2004, 12:00 |
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Referenzen: |
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0969
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0975 |
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Applikationen: |
OpenSSL |
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Originalnachricht |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200411-15 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal Title: OpenSSL, Groff: Insecure tempfile handling Date: November 08, 2004 Bugs: #68404, #68407 ID: 200411-15
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Synopsis ========
groffer, included in the Groff package, and the der_chop script, included in the OpenSSL package, are both vulnerable to symlink attacks, potentially allowing a local user to overwrite arbitrary files with the rights of the user running the utility.
Background ==========
OpenSSL is a toolkit implementing the Secure Sockets Layer and Transport Layer Security protocols as well as a general-purpose cryptography library. It includes the der_chop script, which is used to convert DER-encoded certificates to PEM format. Groff (GNU Troff) is a typesetting package which reads plain text mixed with formatting commands and produces formatted output. It includes groffer, a command used to display groff files and man pages on X and tty.
Affected packages =================
------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 dev-libs/openssl < 0.9.7d-r2 >= 0.9.7d-r2 2 sys-apps/groff < 1.19.1-r2 >= 1.19.1-r2 ------------------------------------------------------------------- 2 affected packages on all of their supported architectures. -------------------------------------------------------------------
Description ===========
groffer and the der_chop script create 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 groffer or der_chop is executed, 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 Groff users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=sys-apps/groff-1.19.1-r2"
All OpenSSL users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose ">=dev-libs/openssl-0.9.7d-r2"
Note: /etc/ssl/misc/der_chop is protected by Portage as a configuration file. Don't forget to use etc-update and overwrite the old version with the new one.
References ==========
[ 1 ] CAN-2004-0969 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0969 [ 2 ] CAN-2004-0975 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0975
Availability ============
This GLSA and any updates to it are available for viewing at the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200411-15.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
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