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CVE-2015-7181

22
FAUCET Score

CVE-2015-7181 describes a use-after-poison vulnerability in the sec_asn1d_parse_leaf function within Mozilla Network Security Services (NSS) versions prior to 3.19.2.1 and 3.20.1, affecting products like Firefox before 42.0 and Firefox ESR 38.x before 38.4. This flaw allows remote attackers to trigger an application crash (Denial of Service) or potentially execute arbitrary code through specially crafted OCTET STRING data. The vulnerability carries a CVSS score of 7.5 (High), indicating a critical severity. It can be exploited remotely over the network with low attack complexity, potentially leading to partial confidentiality, integrity, and availability impacts. There is currently no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available. Community discussion and media coverage for this CVE are minimal, suggesting it has not garnered significant public attention.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.19.2.0CPE matchmatch criteria
cpe:2.3:a:mozilla:network_security_services:*:*:*:*:*:*:*:*
3.20.0CPE matchmatch criteria
cpe:2.3:a:mozilla:network_security_services:3.20.0:*:*:*:*:*:*:*
<= 41.0.2CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
38.0CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:38.0:*:*:*:*:*:*:*
38.0.1CPE matchmatch criteria
cpe:2.3:a:mozilla:firefox:38.0.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
7.51%
Probability of exploitation in next 30 days
EPSS Percentile
93.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0751 is in the 90th percentile among its peer group of 51,506 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (22)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: nss-util-0:3.19.1-4.ael7b_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: nspr-0:4.10.8-2.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: nss-0:3.19.1-2.el5_11
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: nspr-0:4.10.8-2.el6_7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: nss-0:3.19.1-5.el6_7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: nss-util-0:3.19.1-2.el6_7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.2 Advanced Update SupportFixed in: nspr-0:4.8.9-6.el6_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.2 Advanced Update SupportFixed in: nss-0:3.13.1-12.el6_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.2 Advanced Update SupportFixed in: nss-util-0:3.13.1-9.el6_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.4 Advanced Update SupportFixed in: nspr-0:4.9.5-5.el6_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.4 Advanced Update SupportFixed in: nss-0:3.14.3-9.el6_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.4 Advanced Update SupportFixed in: nss-util-0:3.14.3-7.el6_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.5 Extended Update SupportFixed in: nspr-0:4.10.6-2.el6_5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.5 Extended Update SupportFixed in: nss-0:3.16.1-9.el6_5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.5 Extended Update SupportFixed in: nss-util-0:3.16.1-3.el6_5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.6 Extended Update SupportFixed in: nspr-0:4.10.8-2.el6_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.6 Extended Update SupportFixed in: nss-0:3.19.1-4.el6_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.6 Extended Update SupportFixed in: nss-util-0:3.19.1-2.el6_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: nspr-0:4.10.8-2.ael7b_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: nss-0:3.19.1-7.ael7b_1.2
View patch
mozillavendor investigatingvia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: nss

Vendor Advisories (1)

redhatCVE-2015-7181Critical

nss: use-after-poison in sec_asn1d_parse_leaf() (MFSA 2015-133)

Nov 3, 2015

References

lists.opensuse.org / opensuse-security-announce/2015-11/msg00013.html
lists.opensuse.org / opensuse-security-announce/2015-11/msg00015.html
lists.opensuse.org / opensuse-security-announce/2015-11/msg00020.html
lists.opensuse.org / opensuse-security-announce/2015-11/msg00021.html
lists.opensuse.org / opensuse-security-announce/2015-11/msg00025.html
lists.opensuse.org / opensuse-updates/2015-12/msg00037.html
lists.opensuse.org / opensuse-updates/2015-12/msg00049.html
packetstormsecurity.com / files/134268/Slackware-Security-Advisory-mozilla-nss-Updates.html
rhn.redhat.com / errata/RHSA-2015-1980.html
rhn.redhat.com / errata/RHSA-2015-1981.html
bto.bluecoat.com / security-advisory/sa119
bugzilla.mozilla.org / show_bug.cgi
developer.mozilla.org / en-US/docs/Mozilla/Projects/NSS/NSS_3.19.2.1_release_notes
Vendor Advisory
developer.mozilla.org / en-US/docs/Mozilla/Projects/NSS/NSS_3.19.4_release_notes
Vendor Advisory
developer.mozilla.org / en-US/docs/Mozilla/Projects/NSS/NSS_3.20.1_release_notes
Vendor Advisory
security.gentoo.org / glsa/201512-10
security.gentoo.org / glsa/201605-06
debian.org / security/2015/dsa-3393
debian.org / security/2015/dsa-3410
debian.org / security/2016/dsa-3688
mozilla.org / security/announce/2015/mfsa2015-133.html
Vendor Advisory
oracle.com / technetwork/security-advisory/cpuapr2016v3-2985753.html
oracle.com / technetwork/security-advisory/cpujul2016-2881720.html
oracle.com / technetwork/security-advisory/cpuoct2017-3236626.html
oracle.com / technetwork/topics/security/bulletinapr2016-2952098.html
oracle.com / technetwork/topics/security/linuxbulletinoct2015-2719645.html
oracle.com / technetwork/topics/security/ovmbulletinjul2016-3090546.html
securityfocus.com / bid/77416
securityfocus.com / bid/91787
securitytracker.com / id/1034069
slackware.com / security/viewer.php
ubuntu.com / usn/USN-2785-1
ubuntu.com / usn/USN-2791-1
ubuntu.com / usn/USN-2819-1