Cryptographic Issues The advisory has been revoked - it doesn't affect any version of package nss (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1610-NSS-622580
- published31 Jan 2016
- disclosed31 Jan 2016
Introduced: 31 Jan 2016
CVE-2016-1938 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:16.10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream nss package and not the nss package as distributed by Ubuntu.
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
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2016-1938
- https://hg.mozilla.org/projects/nss/diff/a555bf0fc23a/lib/freebl/mpi/mpi.c
- http://www.debian.org/security/2016/dsa-3688
- https://security-tracker.debian.org/tracker/CVE-2016-1938
- https://security.gentoo.org/glsa/201605-06
- https://security.gentoo.org/glsa/201701-46
- https://blog.fuzzing-project.org/37-Mozilla-NSS-Wrong-calculation-results-in-mp_div-and-mp_exptmod.html
- 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
- http://www.mozilla.org/security/announce/2016/mfsa2016-07.html
- 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
- http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html
- https://bugzilla.mozilla.org/show_bug.cgi?id=1190248
- https://bugzilla.mozilla.org/show_bug.cgi?id=1194947
- http://www.securityfocus.com/bid/81955
- http://www.securityfocus.com/bid/91787
- http://www.securitytracker.com/id/1034825
- http://www.ubuntu.com/usn/USN-2880-1
- http://www.ubuntu.com/usn/USN-2880-2
- http://www.ubuntu.com/usn/USN-2903-1
- http://www.ubuntu.com/usn/USN-2903-2
- http://www.ubuntu.com/usn/USN-2973-1