CVE-2021-23961 — Sensitive Information Exposure in Mozilla Firefox

CWE-200 — Sensitive Information Exposure13 documents7 sources
Severity
7.4HIGHNVD
EPSS
0.6%
top 29.64%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
6
Mozilla FirefoxMozilla ThunderbirdDebian Firefox+3 more
Timeline
PublishedFeb 26
Latest updateMay 24

Description

Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. This vulnerability affects Firefox < 85.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:NExploitability: 2.8 | Impact: 4.0

Affected Packages8 packages

▶debiandebian/firefox< firefox 85.0-1 (sid)
▶CVEListV5mozilla/firefox< 85
▶NVDmozilla/firefox< 85.0
▶debiandebian/firefox-esr< firefox 85.0-1 (sid)
▶mozillamozilla/firefox

Also affects: Debian Linux 10.0, 9.0

🔴Vulnerability Details

4
GHSA
GHSA-m4x9-6p9j-3hx6: Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well↗2022-05-24
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OSV
thunderbird vulnerabilities↗2021-06-25
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OSV
thunderbird vulnerabilities↗2021-06-22
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OSV
CVE-2021-23961: Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well↗2021-02-26
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📋Vendor Advisories

8
Ubuntu
Thunderbird vulnerabilities↗2021-06-25
▶
Ubuntu
Thunderbird vulnerabilities↗2021-06-22
▶
Red Hat
Mozilla: More internal network hosts could have been probed by a malicious webpage↗2021-04-19
▶
Ubuntu
Firefox vulnerabilities↗2021-02-01
▶
Debian
CVE-2021-23961: firefox - Further techniques that built on the slipstream research combined with a malicio...↗2021
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