CVE-2021-23978
published 2021-02-26CVE-2021-23978: Mozilla developers reported memory safety bugs present in Firefox 85 and Firefox ESR 78.7. Some of these bugs showed evidence of memory corruption and we…
PriorityP342high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
1.54%
71.9th percentile
Mozilla developers reported memory safety bugs present in Firefox 85 and Firefox ESR 78.7. 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 < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
Affected
15 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | debian_linux | — | — |
| debian | firefox | < firefox 86.0-1 (sid) | firefox 86.0-1 (sid) |
| debian | firefox-esr | < firefox 86.0-1 (sid) | firefox 86.0-1 (sid) |
| debian | thunderbird | < firefox 86.0-1 (sid) | firefox 86.0-1 (sid) |
| mozilla | firefox | < 86 | 86 |
| mozilla | firefox | < 86.0 | 86.0 |
| mozilla | firefox | — | — |
| mozilla | firefox_esr | < 78.8 | 78.8 |
| mozilla | thunderbird | < 78.8 | 78.8 |
| mozilla | thunderbird | >= 0 < 1:78.8.0-1 | 1:78.8.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.8.0-1 | 1:78.8.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.8.0-1 | 1:78.8.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.8.0-1 | 1:78.8.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.8.1+build1-0ubuntu0.20.04.1 | 1:78.8.1+build1-0ubuntu0.20.04.1 |
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_ubuntu4.3MEDIUM
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Ubuntu
Thunderbird vulnerabilities
vendor_ubuntu·2021-05-06·CVSS 4.3
CVE-2021-23969 [MEDIUM] 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-2021-23968,
CVE-2021-23969, CVE-2021-23973, CVE-2021-23978)
It was discovered that Thunderbird may keep key material in memory in some
circumstances. A local attacker could potentially exploit this to obtain
private keys. (CVE-2021-29950)
Instructions: After a standard system update you need to restart Thunderbird to make
all the necessary changes.
Ubuntu
Firefox vulnerabilities
vendor_ubuntu·2021-02-26
CVE-2021-23971 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, obtain sensitive
information, conduct cross-site scripting (XSS) attacks, bypass HTTP auth
phishing warnings, 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 86 and Firefox ESR 78.8
vendor_redhat·2021-02-23·CVSS 8.8
CVE-2021-23978 [HIGH] CWE-120 Mozilla: Memory safety bugs fixed in Firefox 86 and Firefox ESR 78.8
Mozilla: Memory safety bugs fixed in Firefox 86 and Firefox ESR 78.8
Mozilla developers reported memory safety bugs present in Firefox 85 and Firefox ESR 78.7. 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 < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
Package: firefox (Red Hat Enterprise Linux 6) - Out of support scope
Package: thunderbird (Red Hat Enterprise Linux 6) - Out of support scope
Debian
CVE-2021-23978: firefox - Mozilla developers reported memory safety bugs present in Firefox 85 and Firefox...
vendor_debian·2021·CVSS 8.8
CVE-2021-23978 [HIGH] CVE-2021-23978: firefox - Mozilla developers reported memory safety bugs present in Firefox 85 and Firefox...
Mozilla developers reported memory safety bugs present in Firefox 85 and Firefox ESR 78.7. 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 < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
Scope: local
sid: resolved (fixed in 86.0-1)
Mozilla
Mozilla Foundation Security Advisory 2021-09: CVE-2021-23978
vendor_mozilla·CVSS 8.8
CVE-2021-23978 [HIGH] Mozilla Foundation Security Advisory 2021-09: CVE-2021-23978
Mozilla Foundation Security Advisory 2021-09
CVE: CVE-2021-23978
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 78.8
Mozilla
Mozilla Foundation Security Advisory 2021-08: CVE-2021-23978
vendor_mozilla·CVSS 8.8
CVE-2021-23978 [HIGH] Mozilla Foundation Security Advisory 2021-08: CVE-2021-23978
Mozilla Foundation Security Advisory 2021-08
CVE: CVE-2021-23978
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 78.8
Mozilla
Mozilla Foundation Security Advisory 2021-07: CVE-2021-23978
vendor_mozilla·CVSS 8.8
CVE-2021-23978 [HIGH] Mozilla Foundation Security Advisory 2021-07: CVE-2021-23978
Mozilla Foundation Security Advisory 2021-07
CVE: CVE-2021-23978
Product: Firefox
Impact: high
Fixed in: Firefox 86
GHSA
GHSA-3rjx-v36w-2rw5: Mozilla developers reported memory safety bugs present in Firefox 85 and Firefox ESR 78
ghsa_unreviewed·2022-05-24
CVE-2021-23978 [HIGH] CWE-787 GHSA-3rjx-v36w-2rw5: Mozilla developers reported memory safety bugs present in Firefox 85 and Firefox ESR 78
Mozilla developers reported memory safety bugs present in Firefox 85 and Firefox ESR 78.7. 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 < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
OSV
thunderbird vulnerabilities
osv·2021-05-06·CVSS 4.3
CVE-2021-23968 [MEDIUM] thunderbird vulnerabilities
thunderbird vulnerabilities
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-2021-23968,
CVE-2021-23969, CVE-2021-23973, CVE-2021-23978)
It was discovered that Thunderbird may keep key material in memory in some
circumstances. A local attacker could potentially exploit this to obtain
private keys. (CVE-2021-29950)
OSV
CVE-2021-23978: Mozilla developers reported memory safety bugs present in Firefox 85 and Firefox ESR 78
osv·2021-02-26·CVSS 8.8
CVE-2021-23978 [HIGH] CVE-2021-23978: Mozilla developers reported memory safety bugs present in Firefox 85 and Firefox ESR 78
Mozilla developers reported memory safety bugs present in Firefox 85 and Firefox ESR 78.7. 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 < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://bugzilla.mozilla.org/buglist.cgi?bug_id=786797%2C1682928%2C1687391%2C1687597https://lists.debian.org/debian-lts-announce/2021/03/msg00000.htmlhttps://security.gentoo.org/glsa/202104-09https://security.gentoo.org/glsa/202104-10https://www.debian.org/security/2021/dsa-4866https://www.mozilla.org/security/advisories/mfsa2021-07/https://www.mozilla.org/security/advisories/mfsa2021-08/https://www.mozilla.org/security/advisories/mfsa2021-09/https://bugzilla.mozilla.org/buglist.cgi?bug_id=786797%2C1682928%2C1687391%2C1687597https://lists.debian.org/debian-lts-announce/2021/03/msg00000.htmlhttps://security.gentoo.org/glsa/202104-09https://security.gentoo.org/glsa/202104-10https://www.debian.org/security/2021/dsa-4866https://www.mozilla.org/security/advisories/mfsa2021-07/https://www.mozilla.org/security/advisories/mfsa2021-08/https://www.mozilla.org/security/advisories/mfsa2021-09/
2021-02-26
Published