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Network Security Services CVE-2015-7575

MEDIUM
Data Processing Errors (CWE-19)
2016-01-09 secalert@redhat.com
Information Disclosure Microsoft Mozilla Canonical Leap Ubuntu Linux Network Security Services Opensuse
5.9
CVSS 3.0 · NVD
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Vulnerability Assessment

Weakness
CWE
CWE-19
ASVS 5.0
V2 - Validation and Business Logic Data processing
Impact

CVSS score of 5.9 (MEDIUM). Attack characteristics: network attack vector, high complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 1.51%.
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).
No patch listed yet 1.5% exploitation probability (EPSS)

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AnalysisAI

Mozilla Network Security Services (NSS) before 3.20.2, as used in Mozilla Firefox before 43.0.2 and Firefox ESR 38.x before 38.5.2, does not reject MD5 signatures in Server Key Exchange messages in. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. 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-19. Mozilla Network Security Services (NSS) before 3.20.2, as used in Mozilla Firefox before 43.0.2 and Firefox ESR 38.x before 38.5.2, does not reject MD5 signatures in Server Key Exchange messages in TLS 1.2 Handshake Protocol traffic, which makes it easier for man-in-the-middle attackers to spoof servers by triggering a collision. Affected products include: Mozilla Network Security Services, Opensuse Leap, Opensuse, Mozilla Firefox, Canonical Ubuntu Linux. Version information: before 3.20.2.

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

NVD PRIMARY 5.9 MEDIUM
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

DescriptionNVD

Mozilla Network Security Services (NSS) before 3.20.2, as used in Mozilla Firefox before 43.0.2 and Firefox ESR 38.x before 38.5.2, does not reject MD5 signatures in Server Key Exchange messages in TLS 1.2 Handshake Protocol traffic, which makes it easier for man-in-the-middle attackers to spoof servers by triggering a collision.

Threat Intelligence Overview

EPSS Score
1.5%
Top 19% exploitable
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 No
EPSS 1.5%
Patch available No
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
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: +2
CVSS: +30
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)NVD

cpe:2.3:a:mozilla:network_security_services:*:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.0.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.0.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.1.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.1.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.2.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.2.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.3.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.4.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.5.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:38.5.1:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

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References

Advisories & patches
ADVISORY http://www.mozilla.org/security/announce/2015/mfsa2015-150.html ADVISORY http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html ADVISORY https://developer.mozilla.org/docs/Mozilla/Projects/NSS/NSS_3.20.2_release_notes REF http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00038.html REF http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00041.html REF http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00042.html REF http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00043.html REF http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00044.html REF http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00045.html REF http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00047.html REF http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00048.html REF http://lists.opensuse.org/opensuse-updates/2015-12/msg00139.html REF http://lists.opensuse.org/opensuse-updates/2016-01/msg00005.html REF http://lists.opensuse.org/opensuse-updates/2016-01/msg00058.html REF http://lists.opensuse.org/opensuse-updates/2016-01/msg00059.html REF http://lists.opensuse.org/opensuse-updates/2016-02/msg00007.html REF http://lists.opensuse.org/opensuse-updates/2016-02/msg00008.html REF http://lists.opensuse.org/opensuse-updates/2016-02/msg00101.html REF http://lists.opensuse.org/opensuse-updates/2016-02/msg00166.html REF http://rhn.redhat.com/errata/RHSA-2016-0049.html REF http://rhn.redhat.com/errata/RHSA-2016-0050.html REF http://rhn.redhat.com/errata/RHSA-2016-0053.html REF http://rhn.redhat.com/errata/RHSA-2016-0054.html REF http://rhn.redhat.com/errata/RHSA-2016-0055.html REF http://rhn.redhat.com/errata/RHSA-2016-0056.html REF http://www.debian.org/security/2016/dsa-3436 REF http://www.debian.org/security/2016/dsa-3437 REF http://www.debian.org/security/2016/dsa-3457 REF http://www.debian.org/security/2016/dsa-3458 REF http://www.debian.org/security/2016/dsa-3465 REF http://www.debian.org/security/2016/dsa-3491 REF http://www.debian.org/security/2016/dsa-3688 REF http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html REF http://www.oracle.com/technetwork/security-advisory/cpujul2016-2881720.html REF http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html REF http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html REF http://www.securityfocus.com/bid/79684 REF http://www.securityfocus.com/bid/91787 REF http://www.securitytracker.com/id/1034541 REF http://www.securitytracker.com/id/1036467 REF http://www.ubuntu.com/usn/USN-2863-1 REF http://www.ubuntu.com/usn/USN-2864-1 REF http://www.ubuntu.com/usn/USN-2865-1 REF http://www.ubuntu.com/usn/USN-2866-1 REF http://www.ubuntu.com/usn/USN-2884-1 REF http://www.ubuntu.com/usn/USN-2904-1 REF https://access.redhat.com/errata/RHSA-2016:1430 REF https://bugzilla.mozilla.org/show_bug.cgi?id=1158489 REF https://security.gentoo.org/glsa/201701-46 REF https://security.gentoo.org/glsa/201706-18 REF https://security.gentoo.org/glsa/201801-15 REF https://security.netapp.com/advisory/ntap-20160225-0001/

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