CVE-2016-1938

Description

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.

References

https://security.gentoo.org/glsa/201701-46

https://security.gentoo.org/glsa/201605-06

https://hg.mozilla.org/projects/nss/diff/a555bf0fc23a/lib/freebl/mpi/mpi.c

https://github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_exptmod.c

https://github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_div.c

https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.21_release_notes

https://bugzilla.mozilla.org/show_bug.cgi?id=1194947

https://bugzilla.mozilla.org/show_bug.cgi?id=1190248

https://blog.fuzzing-project.org/37-Mozilla-NSS-Wrong-calculation-results-in-mp_div-and-mp_exptmod.html

http://www.ubuntu.com/usn/USN-2973-1

http://www.ubuntu.com/usn/USN-2903-2

http://www.ubuntu.com/usn/USN-2903-1

http://www.ubuntu.com/usn/USN-2880-2

http://www.ubuntu.com/usn/USN-2880-1

http://www.securitytracker.com/id/1034825

http://www.securityfocus.com/bid/91787

http://www.securityfocus.com/bid/81955

http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html

http://www.mozilla.org/security/announce/2016/mfsa2016-07.html

http://www.debian.org/security/2016/dsa-3688

http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00010.html

http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00002.html

http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00001.html

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3