CVE-2020-26974
published 2021-01-07CVE-2020-26974: When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap…
PriorityP343high8.8CVSS 3.1
AVNACLPRNUIRSUCHIHAH
EPSS
1.47%
70.5th percentile
When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.
Affected
17 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | firefox | < firefox 84.0-1 (sid) | firefox 84.0-1 (sid) |
| debian | firefox-esr | < firefox 84.0-1 (sid) | firefox 84.0-1 (sid) |
| debian | thunderbird | < firefox 84.0-1 (sid) | firefox 84.0-1 (sid) |
| mozilla | firefox | < 84.0 | 84.0 |
| mozilla | firefox | — | — |
| mozilla | firefox | >= 0 < 84.0+build3-0ubuntu0.16.04.1 | 84.0+build3-0ubuntu0.16.04.1 |
| mozilla | firefox | >= 0 < 84.0+build3-0ubuntu0.18.04.1 | 84.0+build3-0ubuntu0.18.04.1 |
| mozilla | firefox | >= 0 < 84.0+build3-0ubuntu0.20.04.1 | 84.0+build3-0ubuntu0.20.04.1 |
| mozilla | firefox | >= unspecified < 84 | 84 |
| mozilla | firefox_esr | < 78.6.0 | 78.6.0 |
| mozilla | firefox_esr | >= unspecified < 78.6 | 78.6 |
| mozilla | thunderbird | < 78.6.0 | 78.6.0 |
| mozilla | thunderbird | >= 0 < 1:78.6.0-1 | 1:78.6.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.6.0-1 | 1:78.6.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.6.0-1 | 1:78.6.0-1 |
| mozilla | thunderbird | >= 0 < 1:78.6.0-1 | 1:78.6.0-1 |
| mozilla | thunderbird | >= unspecified < 78.6 | 78.6 |
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_ubuntu6.5MEDIUM
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Ubuntu
Thunderbird vulnerabilities
vendor_ubuntu·2021-01-20·CVSS 6.5
CVE-2020-16042 [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 in to opening a specially crafted website in a browsing context,
an attacker could potentially exploit these to cause a denial of service,
obtain sensitive information, bypass the CSS sanitizer, or execute
arbitrary code. (CVE-2020-16042, CVE-2020-16044, CVE-2020-26971,
CVE-2020-26973, CVE-2020-26974, CVE-2020-26978, CVE-2020-35113)
It was discovered that the proxy.onRequest API did not catch
view-source URLs. If a user were tricked in to installing an
extension with the proxy permission and opening View Source, an
attacker could potentially exploit this to obtain sensitive
information. (CVE-2020-35111)
A stack ov
Red Hat
Mozilla: Incorrect cast of StyleGenericFlexBasis resulted in a heap use-after-free
vendor_redhat·2020-12-15·CVSS 8.8
CVE-2020-26974 [HIGH] CWE-416 Mozilla: Incorrect cast of StyleGenericFlexBasis resulted in a heap use-after-free
Mozilla: Incorrect cast of StyleGenericFlexBasis resulted in a heap use-after-free
When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.
The Mozilla Foundation Security Advisory describes this flaw as:
When `flex-basis` was used on a table wrapper, a `StyleGenericFlexBasis` object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash.
Package: thunderbird (Red Hat Enterprise Linux 5) - Out of support scope
Package: firefox (Red Hat Enterprise
Ubuntu
Firefox vulnerabilities
vendor_ubuntu·2020-12-15·CVSS 6.5
CVE-2020-26971 [MEDIUM] 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, bypass the CSS sanitizer, bypass security restrictions,
spoof the URL bar, or execute arbitrary code. (CVE-2020-16042,
CVE-2020-26971, CVE-2020-26972, CVE-2020-26793, CVE-2020-26974,
CVE-2020-26976, CVE-2020-26978, CVE-2020-26979,
CVE-2020-35113, CVE-2020-35114)
It was discovered that the proxy.onRequest API did not catch
view-source URLs. If a user were tricked in to installing an
extension with the proxy permission and opening View So
Debian
CVE-2020-26974: firefox - When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object coul...
vendor_debian·2020·CVSS 8.8
CVE-2020-26974 [HIGH] CVE-2020-26974: firefox - When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object coul...
When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.
Scope: local
sid: resolved (fixed in 84.0-1)
Mozilla
Mozilla Foundation Security Advisory 2020-55: CVE-2020-26974
vendor_mozilla·CVSS 8.8
CVE-2020-26974 [HIGH] Mozilla Foundation Security Advisory 2020-55: CVE-2020-26974
Mozilla Foundation Security Advisory 2020-55
CVE: CVE-2020-26974
Product: Firefox ESR
Impact: high
Fixed in: Firefox ESR 78.6
Mozilla
Mozilla Foundation Security Advisory 2020-56: CVE-2020-26974
vendor_mozilla·CVSS 8.8
CVE-2020-26974 [HIGH] Mozilla Foundation Security Advisory 2020-56: CVE-2020-26974
Mozilla Foundation Security Advisory 2020-56
CVE: CVE-2020-26974
Product: Thunderbird
Impact: high
Fixed in: Thunderbird 78.6
Mozilla
Mozilla Foundation Security Advisory 2020-54: CVE-2020-26974
vendor_mozilla·CVSS 8.8
CVE-2020-26974 [HIGH] Mozilla Foundation Security Advisory 2020-54: CVE-2020-26974
Mozilla Foundation Security Advisory 2020-54
CVE: CVE-2020-26974
Product: Firefox
Impact: high
Fixed in: Firefox 84
GHSA
GHSA-gr4h-9jxj-93vm: When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type
ghsa_unreviewed·2022-05-24
CVE-2020-26974 [HIGH] CWE-787 GHSA-gr4h-9jxj-93vm: When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type
When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.
OSV
CVE-2020-26974: When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type
osv·2021-01-07·CVSS 8.8
CVE-2020-26974 [HIGH] CVE-2020-26974: When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type
When flex-basis was used on a table wrapper, a StyleGenericFlexBasis object could have been incorrectly cast to the wrong type. This resulted in a heap user-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 84, Thunderbird < 78.6, and Firefox ESR < 78.6.
OSV
firefox vulnerabilities
osv·2020-12-15·CVSS 6.5
CVE-2020-16042 [MEDIUM] firefox vulnerabilities
firefox vulnerabilities
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, bypass the CSS sanitizer, bypass security restrictions,
spoof the URL bar, or execute arbitrary code. (CVE-2020-16042,
CVE-2020-26971, CVE-2020-26972, CVE-2020-26793, CVE-2020-26974,
CVE-2020-26976, CVE-2020-26978, CVE-2020-26979,
CVE-2020-35113, CVE-2020-35114)
It was discovered that the proxy.onRequest API did not catch
view-source URLs. If a user were tricked in to installing an
extension with the proxy permission and opening View Source, an
attacker could potentially exploit this to obtain sensitive
information. (CVE-2020-35111)
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
https://bugzilla.mozilla.org/show_bug.cgi?id=1681022https://www.mozilla.org/security/advisories/mfsa2020-54/https://www.mozilla.org/security/advisories/mfsa2020-55/https://www.mozilla.org/security/advisories/mfsa2020-56/https://bugzilla.mozilla.org/show_bug.cgi?id=1681022https://www.mozilla.org/security/advisories/mfsa2020-54/https://www.mozilla.org/security/advisories/mfsa2020-55/https://www.mozilla.org/security/advisories/mfsa2020-56/
2021-01-07
Published