CVE-2021-38493
published 2021-11-03CVE-2021-38493: Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13. Some of these bugs showed evidence of memory corruption and we…
PriorityP343high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
1.21%
64.5th percentile
Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13. 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 ESR < 78.14, Thunderbird < 78.14, and Firefox < 92.
Affected
14 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 92.0-1 (sid) | firefox 92.0-1 (sid) |
| debian | firefox-esr | < firefox 92.0-1 (sid) | firefox 92.0-1 (sid) |
| debian | thunderbird | < firefox 92.0-1 (sid) | firefox 92.0-1 (sid) |
| mozilla | firefox | < 92.0 | 92.0 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= unspecified < 92 | 92 |
| mozilla | firefox_esr | < 78.14 | 78.14 |
| mozilla | firefox_esr | >= unspecified < 78.14 | 78.14 |
| mozilla | thunderbird | < 78.14 | 78.14 |
| mozilla | thunderbird | >= 0 < 1:78.14.0-1~deb11u1 | 1:78.14.0-1~deb11u1 |
| mozilla | thunderbird | >= 0 < 1:78.14.0-1 | 1:78.14.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.14.0-1 | 1:78.14.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.14.0-1 | 1:78.14.0-1 |
| mozilla | thunderbird | >= unspecified < 78.14 | 78.14 |
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
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GHSA
GHSA-6rrw-rx8w-qx97: Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78
ghsa_unreviewed·2022-05-24
CVE-2021-38493 [HIGH] CWE-119 GHSA-6rrw-rx8w-qx97: Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78
Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13. 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 ESR < 78.14, Thunderbird < 78.14, and Firefox < 92.
OSV
CVE-2021-38493: Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78
osv·2021-11-03·CVSS 8.8
CVE-2021-38493 [HIGH] CVE-2021-38493: Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78
Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13. 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 ESR < 78.14, Thunderbird < 78.14, and Firefox < 92.
Ubuntu
Thunderbird vulnerabilities
vendor_ubuntu·2021-11-11
CVE-2021-38493 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, or
execute arbitrary code.
Instructions: After a standard system update you need to restart Thunderbird to make
all the necessary changes.
Ubuntu
Firefox vulnerabilities
vendor_ubuntu·2021-09-09
CVE-2021-38493 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 into opening a specially crafted website, an attacker could
potentially exploit these to cause a denial of service, bypass mixed
content blocking, 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 92, Firefox ESR 78.14 and Firefox ESR 91.1
vendor_redhat·2021-09-07·CVSS 8.8
CVE-2021-38493 [HIGH] CWE-120 Mozilla: Memory safety bugs fixed in Firefox 92, Firefox ESR 78.14 and Firefox ESR 91.1
Mozilla: Memory safety bugs fixed in Firefox 92, Firefox ESR 78.14 and Firefox ESR 91.1
Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13. 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 ESR < 78.14, Thunderbird < 78.14, and Firefox < 92.
Package: firefox (Red Hat Enterprise Linux 6) - Out of support scope
Package: thunderbird (Red Hat Enterprise Linux 6) - Out of support scope
Debian
CVE-2021-38493: firefox - Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox...
vendor_debian·2021·CVSS 8.8
CVE-2021-38493 [HIGH] CVE-2021-38493: firefox - Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox...
Mozilla developers reported memory safety bugs present in Firefox 91 and Firefox ESR 78.13. 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 ESR < 78.14, Thunderbird < 78.14, and Firefox < 92.
Scope: local
sid: resolved (fixed in 92.0-1)
Mozilla
Mozilla Foundation Security Advisory 2021-39: CVE-2021-38493
vendor_mozilla·CVSS 8.8
CVE-2021-38493 [HIGH] Mozilla Foundation Security Advisory 2021-39: CVE-2021-38493
Mozilla Foundation Security Advisory 2021-39
CVE: CVE-2021-38493
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 78.14
Mozilla
Mozilla Foundation Security Advisory 2021-38: CVE-2021-38493
vendor_mozilla·CVSS 8.8
CVE-2021-38493 [HIGH] Mozilla Foundation Security Advisory 2021-38: CVE-2021-38493
Mozilla Foundation Security Advisory 2021-38
CVE: CVE-2021-38493
Product: Firefox
Impact: high
Fixed in: Firefox 92
Mozilla
Mozilla Foundation Security Advisory 2021-42: CVE-2021-38493
vendor_mozilla·CVSS 8.8
CVE-2021-38493 [HIGH] Mozilla Foundation Security Advisory 2021-42: CVE-2021-38493
Mozilla Foundation Security Advisory 2021-42
CVE: CVE-2021-38493
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 78.14
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://bugzilla.mozilla.org/buglist.cgi?bug_id=1723391%2C1724101%2C1724107https://security.gentoo.org/glsa/202202-03https://security.gentoo.org/glsa/202208-14https://www.mozilla.org/security/advisories/mfsa2021-38/https://www.mozilla.org/security/advisories/mfsa2021-39/https://www.mozilla.org/security/advisories/mfsa2021-42/https://bugzilla.mozilla.org/buglist.cgi?bug_id=1723391%2C1724101%2C1724107https://security.gentoo.org/glsa/202202-03https://security.gentoo.org/glsa/202208-14https://www.mozilla.org/security/advisories/mfsa2021-38/https://www.mozilla.org/security/advisories/mfsa2021-39/https://www.mozilla.org/security/advisories/mfsa2021-42/
2021-11-03
Published