CVE-2021-23964
published 2021-02-26CVE-2021-23964: Mozilla developers reported memory safety bugs present in Firefox 84 and Firefox ESR 78.6. Some of these bugs showed evidence of memory corruption and we…
PriorityP342high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
1.27%
66.3th percentile
Mozilla developers reported memory safety bugs present in Firefox 84 and Firefox ESR 78.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.
Affected
12 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 85.0-1 (sid) | firefox 85.0-1 (sid) |
| debian | firefox-esr | < firefox 85.0-1 (sid) | firefox 85.0-1 (sid) |
| debian | thunderbird | < firefox 85.0-1 (sid) | firefox 85.0-1 (sid) |
| mozilla | firefox | < 85 | 85 |
| mozilla | firefox | < 85.0 | 85.0 |
| mozilla | firefox | — | — |
| mozilla | firefox_esr | < 78.7 | 78.7 |
| mozilla | thunderbird | < 78.7 | 78.7 |
| mozilla | thunderbird | >= 0 < 1:78.7.0-1 | 1:78.7.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.7.0-1 | 1:78.7.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.7.0-1 | 1:78.7.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.7.0-1 | 1:78.7.0-1 |
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
nvdv2.06.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P
osv8.8HIGH
vendor_debian8.8HIGH
vendor_redhat8.8HIGH
vendor_ubuntu8.8HIGH
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GHSA
GHSA-4j74-99vm-hh36: Mozilla developers reported memory safety bugs present in Firefox 84 and Firefox ESR 78
ghsa_unreviewed·2022-05-24
CVE-2021-23964 [HIGH] CWE-119 GHSA-4j74-99vm-hh36: Mozilla developers reported memory safety bugs present in Firefox 84 and Firefox ESR 78
Mozilla developers reported memory safety bugs present in Firefox 84 and Firefox ESR 78.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.
OSV
CVE-2021-23964: Mozilla developers reported memory safety bugs present in Firefox 84 and Firefox ESR 78
osv·2021-02-26·CVSS 8.8
CVE-2021-23964 [HIGH] CVE-2021-23964: Mozilla developers reported memory safety bugs present in Firefox 84 and Firefox ESR 78
Mozilla developers reported memory safety bugs present in Firefox 84 and Firefox ESR 78.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.
Ubuntu
Thunderbird vulnerabilities
vendor_ubuntu·2021-02-16·CVSS 8.8
CVE-2020-15685 [HIGH] Thunderbird vulnerabilities
Title: Thunderbird vulnerabilities
Summary: Several security issues were fixed in Thunderbird.
Multiple security issues were discovered in Thunderbird. If a user were
tricked into opening a specially crafted website in a browsing context,
an attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, or execute arbitrary code. (CVE-2020-26976,
CVE-2021-23953, CVE-2021-23954, CVE-2021-23960, CVE-2021-23964)
It was discovered that responses received during the plaintext phase of
the STARTTLS connection setup were subsequently evaluated during the
encrypted session. A person in the middle could potentially exploit this
to perform a response injection attack. (CVE-2020-15685)
Instructions: After a standard system update you need to restart Thunderbi
Ubuntu
Firefox vulnerabilities
vendor_ubuntu·2021-02-01
CVE-2021-23954 Firefox vulnerabilities
Title: Firefox vulnerabilities
Summary: Firefox could be made to crash or run programs as your login if it
opened a malicious website.
Multiple security issues were discovered in Firefox. If a user were
tricked in to opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, obtain sensitive
information, conduct clickjacking attacks, or execute arbitrary code.
Instructions: After a standard system update you need to restart Firefox to make
all the necessary changes.
Red Hat
Mozilla: Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7
vendor_redhat·2021-01-26·CVSS 8.8
CVE-2021-23964 [HIGH] CWE-120 Mozilla: Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7
Mozilla: Memory safety bugs fixed in Firefox 85 and Firefox ESR 78.7
Mozilla developers reported memory safety bugs present in Firefox 84 and Firefox ESR 78.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.
The Mozilla Foundation Security Advisory describes this flaw as:
Mozilla developers reported memory safety bugs present in Firefox 84 and Firefox ESR 78.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code.
Package: firefox (Red Hat Enterprise Linux 6) - Out of support scope
Package: t
Debian
CVE-2021-23964: firefox - Mozilla developers reported memory safety bugs present in Firefox 84 and Firefox...
vendor_debian·2021·CVSS 8.8
CVE-2021-23964 [HIGH] CVE-2021-23964: firefox - Mozilla developers reported memory safety bugs present in Firefox 84 and Firefox...
Mozilla developers reported memory safety bugs present in Firefox 84 and Firefox ESR 78.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.
Scope: local
sid: resolved (fixed in 85.0-1)
Mozilla
Mozilla Foundation Security Advisory 2021-03: CVE-2021-23964
vendor_mozilla·CVSS 8.8
CVE-2021-23964 [HIGH] Mozilla Foundation Security Advisory 2021-03: CVE-2021-23964
Mozilla Foundation Security Advisory 2021-03
CVE: CVE-2021-23964
Product: Firefox
Impact: high
Fixed in: Firefox 85
Mozilla
Mozilla Foundation Security Advisory 2021-05: CVE-2021-23964
vendor_mozilla·CVSS 8.8
CVE-2021-23964 [HIGH] Mozilla Foundation Security Advisory 2021-05: CVE-2021-23964
Mozilla Foundation Security Advisory 2021-05
CVE: CVE-2021-23964
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 78.7
Mozilla
Mozilla Foundation Security Advisory 2021-04: CVE-2021-23964
vendor_mozilla·CVSS 8.8
CVE-2021-23964 [HIGH] Mozilla Foundation Security Advisory 2021-04: CVE-2021-23964
Mozilla Foundation Security Advisory 2021-04
CVE: CVE-2021-23964
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 78.7
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1662507%2C1666285%2C1673526%2C1674278%2C1674835%2C1675097%2C1675844%2C1675868%2C1677590%2C1677888%2C1680410%2C1681268%2C1682068%2C1682938%2C1683736%2C1685260%2C1685925https://www.mozilla.org/security/advisories/mfsa2021-03/https://www.mozilla.org/security/advisories/mfsa2021-04/https://www.mozilla.org/security/advisories/mfsa2021-05/https://bugzilla.mozilla.org/buglist.cgi?bug_id=1662507%2C1666285%2C1673526%2C1674278%2C1674835%2C1675097%2C1675844%2C1675868%2C1677590%2C1677888%2C1680410%2C1681268%2C1682068%2C1682938%2C1683736%2C1685260%2C1685925https://www.mozilla.org/security/advisories/mfsa2021-03/https://www.mozilla.org/security/advisories/mfsa2021-04/https://www.mozilla.org/security/advisories/mfsa2021-05/
2021-02-26
Published