CVE-2015-7575

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.

Published: 2016-01-08 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-7575 is rated Moderate Risk (55.2/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.90%). EPSS rose +1.83% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2015-7575

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.07% 2.90% +1.83%
2 2026-05-24 1.51% 1.07% -0.44%
3 2026-03-30 — 1.51% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-7575

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.9 3.0 MEDIUM
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.2 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2015-7575

OS Trackers for CVE-2015-7575

vendor priority summary link
debian not yet assigned CVE-2015-7575 not yet assigned priority: Debian including 4 source packages (gnutls28, nss, openjdk-8, openssl), 16 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 16. https://security-tracker.debian.org/tracker/CVE-2015-7575
gentoo normal CVE-2015-7575: 4 GLSA(s) (201605-06, 201701-46, 201706-18, 201801-15), 8 atom(s) (dev-libs/nspr, dev-libs/nss, …); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2015-7575
redhat medium — https://access.redhat.com/security/cve/CVE-2015-7575
suse medium CVE-2015-7575 severity moderate: SUSE including 874 source package names (MozillaFirefox-102.11.0-150200.152.87.1, MozillaFirefox-115.10.0-150200.152.134.1, …), 1267 product×package rows across 109 product lines (Image SLES12-SP5-Azure-BYOS, Image SLES12-SP5-Azure-Basic-On-Demand, … (109 product lines)): Fixed 1095, Known Affected 157, Known Not Affected 15. https://www.suse.com/security/cve/CVE-2015-7575/
ubuntu medium CVE-2015-7575 medium priority: Ubuntu including 12 source packages (firefox, gnutls26, …), 143 status rows across 12 suites (artful, bionic, cosmic, disco, precise, trusty, upstream, vivid, wily, xenial, yakkety, zesty): DNE 46, released 46, not-affected 41, ignored 6, needs-triage 4. https://ubuntu.com/security/CVE-2015-7575

Affected software / configurations for CVE-2015-7575

Vendor Product Version Raw CPE
mozilla network_security_services <= 3.20.1 cpe:2.3:a:mozilla:network_security_services:*:*:*:*:*:*:*:*
opensuse leap 42.1 cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*
opensuse opensuse 13.1 cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:*
opensuse opensuse 13.2 cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:*
mozilla firefox 38.0 cpe:2.3:a:mozilla:firefox:38.0:*:*:*:*:*:*:*
mozilla firefox 38.0.1 cpe:2.3:a:mozilla:firefox:38.0.1:*:*:*:*:*:*:*
mozilla firefox 38.0.5 cpe:2.3:a:mozilla:firefox:38.0.5:*:*:*:*:*:*:*
mozilla firefox 38.1.0 cpe:2.3:a:mozilla:firefox:38.1.0:*:*:*:*:*:*:*
mozilla firefox 38.1.1 cpe:2.3:a:mozilla:firefox:38.1.1:*:*:*:*:*:*:*
mozilla firefox 38.2.0 cpe:2.3:a:mozilla:firefox:38.2.0:*:*:*:*:*:*:*
mozilla firefox 38.2.1 cpe:2.3:a:mozilla:firefox:38.2.1:*:*:*:*:*:*:*
mozilla firefox 38.3.0 cpe:2.3:a:mozilla:firefox:38.3.0:*:*:*:*:*:*:*
mozilla firefox 38.4.0 cpe:2.3:a:mozilla:firefox:38.4.0:*:*:*:*:*:*:*
mozilla firefox 38.5.0 cpe:2.3:a:mozilla:firefox:38.5.0:*:*:*:*:*:*:*
mozilla firefox 38.5.1 cpe:2.3:a:mozilla:firefox:38.5.1:*:*:*:*:*:*:*
canonical ubuntu_linux 14.04 cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
canonical ubuntu_linux 15.04 cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:*
canonical ubuntu_linux 15.10 cpe:2.3:o:canonical:ubuntu_linux:15.10:*:*:*:*:*:*:*
mozilla firefox <= 43.0.1 cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*

References for CVE-2015-7575

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