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GNU Emacs "fast-lock-mode" File Processing Vulnerability
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Secunia Advisory:
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SA30199
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Release Date:
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2008-05-13
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Critical:
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Moderately critical
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Impact:
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System access
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Where:
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From remote
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Solution Status:
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Unpatched
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| Software: | GNU Emacs 21.x
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| | CVE reference: | CVE-2008-2142 (Secunia mirror)
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This advisory is currently marked as unpatched!
- Companies can be alerted when a patch is released! |
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Description:
Morten Welinder has reported a vulnerability in GNU Emacs, which can be exploited by malicious people to compromise a user's system.
The vulnerability is caused due to an error in the processing of fast-lock files (.flc) for corresponding source files. This can be exploited to execute arbitrary Emacs Lisp code when e.g. a source file is opened and a specially crafted fast-lock file exists in the same directory.
Successful exploitation requires that "font-lock-support-mode" is set to "fast-lock-mode".
The vulnerability is reported in GNU Emacs 21.3.1. Other versions may also be affected.
Solution:
Do not use "fast-lock-mode" as "font-lock-support-mode". Do not open files within untrusted directories.
Provided and/or discovered by:
Morten Welinder
Original Advisory:
http://lists.gnu.org/archive/html/emacs-devel/2008-05/msg00645.html
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.
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2 Related Secunia Security Advisories
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1. GNU Emacs vcdiff Insecure Temporary Files
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2. GNU Emacs "popmail()" Format String Vulnerability
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