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CVE-2016-1938
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…
Medium6.5EPSS 3.2%
- Published
- Updated
- Reserved
- Assigned by
- mozilla
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium6.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 3.2% · top 12% of all CVEs (3 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
Affected products
n/a
- affected n/a
References (23)
- 81955 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- DSA-3688 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- 1034825 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- GLSA-201701-46 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-2903-2 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- USN-2880-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- USN-2903-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- USN-2880-2 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- https://github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_exptmod.c (opens in a new tab)x_refsource_MISCx_transferred
- https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSS/NSS_3.21_release_notes (opens in a new tab)x_refsource_MISCx_transferred
- SUSE-SU-2016:0338 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- http://www.mozilla.org/security/announce/2016/mfsa2016-07.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://blog.fuzzing-project.org/37-Mozilla-NSS-Wrong-calculation-results-in-mp_div-and-mp_exptmod.html (opens in a new tab)x_refsource_MISCx_transferred
- USN-2973-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- https://bugzilla.mozilla.org/show_bug.cgi?id=1194947 (opens in a new tab)x_refsource_CONFIRMx_transferred
- openSUSE-SU-2016:0309 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- 91787 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- https://github.com/hannob/bignum-fuzz/blob/master/CVE-2016-1938-nss-mp_div.c (opens in a new tab)x_refsource_MISCx_transferred
- GLSA-201605-06 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- https://bugzilla.mozilla.org/show_bug.cgi?id=1190248 (opens in a new tab)x_refsource_CONFIRMx_transferred
- openSUSE-SU-2016:0306 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- https://hg.mozilla.org/projects/nss/diff/a555bf0fc23a/lib/freebl/mpi/mpi.c (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2016-1938)Record last updated .