CVE-2023-0767

27

FAUCET Score

CVE-2023-0767 is a high-severity vulnerability affecting Mozilla Firefox, Thunderbird, and Firefox ESR versions prior to 110 and 102.8 respectively. An attacker could craft a malicious PKCS 12 certificate bundle to trigger arbitrary memory writes due to mishandling of Safe Bag attributes. This vulnerability carries a CVSS score of 8.8 (High), indicating it can be exploited remotely with low complexity, potentially leading to high impact on confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, the vulnerability has garnered some community discussion and media coverage.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 110.0CPE matchmatch criteria	cpe:2.3:a:mozilla:firefox::::::::
		< 102.8CPE matchmatch criteria	cpe:2.3:a:mozilla:firefox_esr::::::::
		< 102.8CPE matchmatch criteria	cpe:2.3:a:mozilla:thunderbird::::::::

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

Exploitability Score

2.8

Impact Score

5.9

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.82%

Probability of exploitation in next 30 days

EPSS Percentile

53.4%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0082 is in the 55th percentile among its peer group of 14,875 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (23)

redhatpatch availablevia redhat_api

Product: Red Hat Virtualization 4 for Red Hat Enterprise Linux 8Fixed in: redhat-virtualization-host-0:4.5.3-202304051438_8.6

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 6 Extended Lifecycle SupportFixed in: nss-0:3.44.0-13.el6_10

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 7Fixed in: nss-0:3.79.0-5.el7_9

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8Fixed in: nss-0:3.79.0-11.el8_7

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.1 Update Services for SAP SolutionsFixed in: nss-0:3.44.0-11.el8_1

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.1 Update Services for SAP SolutionsFixed in: thunderbird-0:102.9.0-2.el8_1

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.1 Update Services for SAP SolutionsFixed in: firefox-0:102.9.0-4.el8_1

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.2 Advanced Update SupportFixed in: nss-0:3.53.1-13.el8_2

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.2 Advanced Update SupportFixed in: thunderbird-0:102.9.0-2.el8_2

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.2 Advanced Update SupportFixed in: firefox-0:102.9.0-4.el8_2

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.2 Telecommunications Update ServiceFixed in: nss-0:3.53.1-13.el8_2

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.2 Telecommunications Update ServiceFixed in: thunderbird-0:102.9.0-2.el8_2

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.2 Telecommunications Update ServiceFixed in: firefox-0:102.9.0-4.el8_2

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.2 Update Services for SAP SolutionsFixed in: nss-0:3.53.1-13.el8_2

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.2 Update Services for SAP SolutionsFixed in: thunderbird-0:102.9.0-2.el8_2

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.2 Update Services for SAP SolutionsFixed in: firefox-0:102.9.0-4.el8_2

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.4 Extended Update SupportFixed in: nss-0:3.67.0-8.el8_4

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.4 Extended Update SupportFixed in: firefox-0:102.9.0-4.el8_4

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.4 Extended Update SupportFixed in: thunderbird-0:102.9.0-2.el8_4

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: nss-0:3.79.0-11.el8_6

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 9Fixed in: nss-0:3.79.0-17.el9_1

redhatpatch availablevia redhat_api

Product: Red Hat Enterprise Linux 9.0 Extended Update SupportFixed in: nss-0:3.79.0-17.el9_0

mozillavendor investigatingvia nvd_reference

Vendor Advisories (1)

redhatCVE-2023-0767Important

nss: Arbitrary memory write via PKCS 12

References

security.netapp.com / advisory/ntap-20230324-0008

alas.aws.amazon.com / AL2/ALAS-2023-1992.html

Product

bugzilla.mozilla.org / show_bug.cgi

Issue TrackingPermissions RequiredVendor Advisory

mozilla.org / security/advisories/mfsa2023-05

Vendor Advisory

mozilla.org / security/advisories/mfsa2023-06

Vendor Advisory

mozilla.org / security/advisories/mfsa2023-07

Vendor Advisory