Medium severity6.5NVD Advisory· Published Jan 31, 2016· Updated Jun 17, 2026
CVE-2016-1938
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
59cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*range: <=43.0.4
- (no CPE)range: <44.0
cpe:2.3:a:mozilla:nss:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mozilla:nss:*:*:*:*:*:*:*:*range: <=3.20.1
- (no CPE)range: <3.21
- osv-coords52 versionspkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/suse/MozillaFirefox-branding-SLED&distro=SUSE%20Linux%20Enterprise%20Desktop%2011%20SP3pkg:rpm/suse/MozillaFirefox-branding-SLED&distro=SUSE%20Linux%20Enterprise%20Desktop%2011%20SP4pkg:rpm/suse/MozillaFirefox-branding-SLED&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP2-LTSSpkg:rpm/suse/MozillaFirefox-branding-SLED&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3pkg:rpm/suse/MozillaFirefox-branding-SLED&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-TERADATApkg:rpm/suse/MozillaFirefox-branding-SLED&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/MozillaFirefox-branding-SLED&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP3pkg:rpm/suse/MozillaFirefox-branding-SLED&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Desktop%2012pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP1pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012pkg:rpm/suse/MozillaFirefox-branding-SLE&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Desktop%2011%20SP3pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Desktop%2011%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Desktop%2012pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP1pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP2-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-TERADATApkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP3pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2011%20SP3pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2011%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP1pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Desktop%2011%20SP3pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Desktop%2011%20SP4pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Desktop%2012pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Desktop%2012%20SP1pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP2-LTSSpkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP3-TERADATApkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%2012pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP1pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP3pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2011%20SP4pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP1pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2011%20SP3pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2011%20SP4pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012pkg:rpm/suse/mozilla-nss&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP1
< 128.5.1-1.1+ 51 more
- (no CPE)range: < 128.5.1-1.1
- (no CPE)range: < 50.1.0-1.1
- (no CPE)range: < 38-18.24
- (no CPE)range: < 38-18.24
- (no CPE)range: < 38-15.58
- (no CPE)range: < 38-18.24
- (no CPE)range: < 38-18.24
- (no CPE)range: < 38-18.24
- (no CPE)range: < 38-18.24
- (no CPE)range: < 38-18.24
- (no CPE)range: < 31.0-20.1
- (no CPE)range: < 31.0-20.1
- (no CPE)range: < 31.0-20.1
- (no CPE)range: < 31.0-20.1
- (no CPE)range: < 31.0-20.1
- (no CPE)range: < 31.0-20.1
- (no CPE)range: < 38.6.0esr-31.3
- (no CPE)range: < 38.6.0esr-31.3
- (no CPE)range: < 38.6.0esr-57.3
- (no CPE)range: < 38.6.0esr-57.3
- (no CPE)range: < 38.6.1esr-33.1
- (no CPE)range: < 38.6.0esr-31.3
- (no CPE)range: < 38.6.0esr-31.3
- (no CPE)range: < 38.6.0esr-31.3
- (no CPE)range: < 38.6.0esr-57.3
- (no CPE)range: < 38.6.0esr-57.3
- (no CPE)range: < 38.6.0esr-31.3
- (no CPE)range: < 38.6.0esr-31.3
- (no CPE)range: < 38.6.0esr-57.3
- (no CPE)range: < 38.6.0esr-57.3
- (no CPE)range: < 38.6.0esr-31.3
- (no CPE)range: < 38.6.0esr-31.3
- (no CPE)range: < 38.6.0esr-57.3
- (no CPE)range: < 38.6.0esr-57.3
- (no CPE)range: < 3.20.2-25.2
- (no CPE)range: < 3.20.2-25.2
- (no CPE)range: < 3.20.2-37.1
- (no CPE)range: < 3.20.2-37.1
- (no CPE)range: < 3.20.2-17.5
- (no CPE)range: < 3.20.2-25.2
- (no CPE)range: < 3.20.2-25.2
- (no CPE)range: < 3.20.2-25.2
- (no CPE)range: < 3.20.2-37.1
- (no CPE)range: < 3.20.2-37.1
- (no CPE)range: < 3.20.2-25.2
- (no CPE)range: < 3.20.2-25.2
- (no CPE)range: < 3.20.2-37.1
- (no CPE)range: < 3.20.2-37.1
- (no CPE)range: < 3.20.2-25.2
- (no CPE)range: < 3.20.2-25.2
- (no CPE)range: < 3.20.2-37.1
- (no CPE)range: < 3.20.2-37.1
Patches
Vulnerability mechanics
References
23- lists.opensuse.org/opensuse-security-announce/2016-02/msg00001.htmlnvdThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2016-02/msg00002.htmlnvdThird Party Advisory
- www.mozilla.org/security/announce/2016/mfsa2016-07.htmlnvdVendor Advisory
- www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.htmlnvdThird Party Advisory
- www.securityfocus.com/bid/91787nvdThird Party AdvisoryVDB Entry
- developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.21_release_notesnvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdIssue Tracking
- bugzilla.mozilla.org/show_bug.cginvdIssue Tracking
- lists.opensuse.org/opensuse-security-announce/2016-02/msg00010.htmlnvd
- www.debian.org/security/2016/dsa-3688nvd
- www.securityfocus.com/bid/81955nvd
- www.securitytracker.com/id/1034825nvd
- www.ubuntu.com/usn/USN-2880-1nvd
- www.ubuntu.com/usn/USN-2880-2nvd
- www.ubuntu.com/usn/USN-2903-1nvd
- www.ubuntu.com/usn/USN-2903-2nvd
- www.ubuntu.com/usn/USN-2973-1nvd
- blog.fuzzing-project.org/37-Mozilla-NSS-Wrong-calculation-results-in-mp_div-and-mp_exptmod.htmlnvd
- github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_div.cnvd
- github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_exptmod.cnvd
- hg.mozilla.org/projects/nss/diff/a555bf0fc23a/lib/freebl/mpi/mpi.cnvd
- security.gentoo.org/glsa/201605-06nvd
- security.gentoo.org/glsa/201701-46nvd
News mentions
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