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CVE-2016-1938

6.5 · MEDIUM

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…

Published Jan 31, 2016CWE-310EPSS 3.16%

Overview

CVE-2016-1938 is a medium-severity vulnerability. It was published on January 31, 2016 and has a CVSS 3.0 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Reflists.opensuse.org/opensuse-security-announce/2016-02/msg00001.htmlReflists.opensuse.org/opensuse-security-announce/2016-02/msg00002.htmlReflists.opensuse.org/opensuse-security-announce/2016-02/msg00010.htmlRefwww.debian.org/security/2016/dsa-3688Refwww.mozilla.org/security/announce/2016/mfsa2016-07.htmlRefwww.oracle.com/technetwork/security-advisory/cpujul2016-2881720.htmlRefwww.securityfocus.com/bid/81955Refwww.securityfocus.com/bid/91787Refwww.securitytracker.com/id/1034825Refwww.ubuntu.com/usn/USN-2880-1

How CyberStrike helps

Frequently asked questions

What is CVE-2016-1938?

CVE-2016-1938 is a medium-severity vulnerability. It was published on January 31, 2016 and has a CVSS 3.0 base score of 6.5 (MEDIUM).

How severe is CVE-2016-1938?

This vulnerability has a CVSS 3.0 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2016-1938?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2016-1938?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2016-1938 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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