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TITLE:
GNU MPFR "mpfr_snprintf()" and "mpfr_vsnprintf()" Off-By-One
Vulnerabilities

SECUNIA ADVISORY ID:
SA34063

VERIFY ADVISORY:
http://secunia.com/advisories/34063/

DESCRIPTION:
Some vulnerabilities have been reported in GNU MPFR, which
potentially can be exploited by malicious people to compromise an
application using the library.

The vulnerabilities are caused due to an off-by-one error within the
implementation of the "mpfr_snprintf()" and "mpfr_vsnprintf()"
functions, which can be exploited to write a NULL byte after the
expected end of the buffer.

The vulnerabilities are reported in versions prior to 2.4.1.

SOLUTION:
Update to version 2.4.1 or apply patch.

Version 2.4.1:
http://mpfr.loria.fr/mpfr-2.4.1/index.html#download

Patch:
http://mpfr.loria.fr/mpfr-2.4.0/patch02

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

ORIGINAL ADVISORY:
http://mpfr.loria.fr/mpfr-2.4.1/index.html#changes

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