CVE-2016-1938

EPSS 3.1%

The s_mp_div function in lib/freebl/mpi/mpi.c in Mozilla Network Security Services (NSS) before 3.21, as used in Mozilla Firefox before 44.0, improperly divides numbers, which might make it easier for remote attackers to defeat cryptographic protection mechanisms by leveraging use of the (1) mp_div or (2) mp_exptmod function.

Affected products

n/a · n/a

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References

http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00001.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00002.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00010.html https://blog.fuzzing-project.org/37-Mozilla-NSS-Wrong-calculation-results-in-mp_div-and-mp_exptmod.html https://bugzilla.mozilla.org/show_bug.cgi?id=1190248 https://bugzilla.mozilla.org/show_bug.cgi?id=1194947 https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.21_release_notes https://github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_div.c https://github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_exptmod.c https://hg.mozilla.org/projects/nss/diff/a555bf0fc23a/lib/freebl/mpi/mpi.c https://security.gentoo.org/glsa/201605-06 https://security.gentoo.org/glsa/201701-46