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Vulnerability Assessment

Weakness
CWE
CWE-326
OWASP Top 10:2025
A04:2025 - Cryptographic Failures
ASVS 5.0
V11 - Cryptography Encryption strength requirements
Impact

CVSS score of 4.3 (MEDIUM). Attack characteristics: network attack vector, M complexity. Public proof-of-concept exploit code is available. EPSS exploitation probability: 0.53%.
Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system.
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.5% exploitation probability (EPSS)

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AnalysisAI

Mozilla Network Security Services (NSS) before 3.15.4, as used in Mozilla Firefox before 27.0, Firefox ESR 24.x before 24.3, Thunderbird before 24.3, SeaMonkey before 2.24, and other products, does. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable. Public exploit code available.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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Technical ContextAI · show details

This vulnerability is classified under CWE-326. Mozilla Network Security Services (NSS) before 3.15.4, as used in Mozilla Firefox before 27.0, Firefox ESR 24.x before 24.3, Thunderbird before 24.3, SeaMonkey before 2.24, and other products, does not properly restrict public values in Diffie-Hellman key exchanges, which makes it easier for remote attackers to bypass cryptographic protection mechanisms in ticket handling by leveraging use of a certain value. Affected products include: Mozilla Firefox, Mozilla Network Security Services, Mozilla Seamonkey, Mozilla Thunderbird, Oracle Enterprise Manager Ops Center. Version information: before 3.15.4.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 4.3 MEDIUM
AV:N/AC:M/Au:N/C:P/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
M
Confidentiality
P
Integrity
None
Availability
None

DescriptionCVE.org

Mozilla Network Security Services (NSS) before 3.15.4, as used in Mozilla Firefox before 27.0, Firefox ESR 24.x before 24.3, Thunderbird before 24.3, SeaMonkey before 2.24, and other products, does not properly restrict public values in Diffie-Hellman key exchanges, which makes it easier for remote attackers to bypass cryptographic protection mechanisms in ticket handling by leveraging use of a certain value.

Threat Intelligence Overview

EPSS Score
0.5%
Top 33% exploitable
Exploit
POC
Public exploit code exists
Data Quality
3 sources
Confidence: Low
NVD CVE.org EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC Yes
EPSS 0.5%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
Poc
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

43
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +22
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Affected Products (CPE)CVE.org

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:network_security_services:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:a:oracle:enterprise_manager_ops_center:*:*:*:*:*:*:*:*
cpe:2.3:a:oracle:enterprise_manager_ops_center:12.2.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:enterprise_manager_ops_center:12.2.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:enterprise_manager_ops_center:12.3.0:*:*:*:*:*:*:*
cpe:2.3:a:oracle:vm_server:3.2:*:*:*:*:*:x86:*
cpe:2.3:o:fedoraproject:fedora:19:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:20:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:11.4:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:12.3:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
cpe:2.3:o:suse:linux_enterprise_desktop:11:sp3:*:*:*:*:*:*
cpe:2.3:o:suse:linux_enterprise_server:11:sp3:*:*:*:*:*:*
cpe:2.3:o:suse:linux_enterprise_server:11:sp3:*:*:*:vmware:*:*
cpe:2.3:o:suse:linux_enterprise_software_development_kit:11:sp3:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
+ 4 more

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References

Advisories & patches
PATCH http://hg.mozilla.org/projects/nss/rev/12c42006aed8 ADVISORY http://www.mozilla.org/security/announce/2014/mfsa2014-12.html REF http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761 REF http://lists.fedoraproject.org/pipermail/package-announce/2014-February/127966.html REF http://lists.fedoraproject.org/pipermail/package-announce/2014-February/129218.html REF http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00004.html REF http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00005.html REF http://lists.opensuse.org/opensuse-security-announce/2014-02/msg00010.html REF http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00017.html REF http://seclists.org/fulldisclosure/2014/Dec/23 REF http://secunia.com/advisories/56858 REF http://secunia.com/advisories/56888 REF http://secunia.com/advisories/56922 REF http://www.debian.org/security/2014/dsa-2858 REF http://www.debian.org/security/2014/dsa-2994 REF http://www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html REF http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html REF http://www.oracle.com/technetwork/topics/security/cpujul2014-1972956.html REF http://www.oracle.com/technetwork/topics/security/cpuoct2014-1972960.html REF http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html REF http://www.securityfocus.com/archive/1/534161/100/0/threaded REF http://www.securityfocus.com/bid/65332 REF http://www.securitytracker.com/id/1029717 REF http://www.securitytracker.com/id/1029720 REF http://www.securitytracker.com/id/1029721 REF http://www.ubuntu.com/usn/USN-2102-1 REF http://www.ubuntu.com/usn/USN-2102-2 REF http://www.ubuntu.com/usn/USN-2119-1 REF http://www.vmware.com/security/advisories/VMSA-2014-0012.html REF https://exchange.xforce.ibmcloud.com/vulnerabilities/90886 REF https://security.gentoo.org/glsa/201504-01

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