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A new version (0.9.0.0 - Release Candidate 1) of the free Secunia PSI
has been released. The new version includes many new and advanced
features, which makes it even easier to stay patched.

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TITLE:
GNU M4 Format String Vulnerability and Security Issue

SECUNIA ADVISORY ID:
SA29671

VERIFY ADVISORY:
http://secunia.com/advisories/29671/

CRITICAL:
Less critical

IMPACT:
Manipulation of data, System access

WHERE:
>From remote

SOFTWARE:
GNU M4 1.x
http://secunia.com/product/14490/

DESCRIPTION:
A vulnerability and a security issue have been reported in GNU M4,
which can be exploited by malicious people to manipulate certain data
or to potentially compromise a user's system.

1) A format string error exists within the  "produce_frozen_state()"
function in src/freeze.c. This can be exploited via a specially
crafted filename passed as a parameter to "m4 -F".

Successful exploitation may allow execution of arbitrary code, but
requires that the user is tricked into processing a filename
containing malicious format specifiers.

2) An error within the implementation of the "maketemp" and "mkstemp"
macros can potentially be exploited to trigger the processing of
improper files via special characters contained in the output
string.

The vulnerability and the security issue are reported in version
1.4.10. Prior versions may also be affected.

SOLUTION:
Update to version 1.4.11.

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://git.sv.gnu.org/gitweb/?p=m4.git;a=commit;h=035998112737e52cb229e342913ef404e5a51040
http://git.sv.gnu.org/gitweb/?p=m4.git;a=commit;h=5345bb49077bfda9fabd048e563f9e7077fe335d

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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