CVE-2020-26968 — Out-of-bounds Write in Mozilla Firefox

CWE-787 — Out-of-bounds WriteCWE-120 — Classic Buffer Overflow12 documents8 sources
Severity
8.8HIGHNVD
EPSS
0.6%
top 29.55%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Mozilla FirefoxMozilla Firefox ESRMozilla Thunderbird
Timeline
PublishedDec 9
Latest updateMay 24

Description

Mozilla developers reported memory safety bugs present in Firefox 82 and Firefox ESR 78.4. 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 < 83, Firefox ESR < 78.5, and Thunderbird < 78.5.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9

Affected Packages7 packages

▶CVEListV5mozilla/firefox< 83
▶NVDmozilla/firefox< 83.0
▶CVEListV5mozilla/firefox_esr< 78.5
▶CVEListV5mozilla/thunderbird< 78.5

🔴Vulnerability Details

3
GHSA
GHSA-84gw-f25v-grqx: Mozilla developers reported memory safety bugs present in Firefox 82 and Firefox ESR 78↗2022-05-24
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OSV
CVE-2020-26968: Mozilla developers reported memory safety bugs present in Firefox 82 and Firefox ESR 78↗2020-12-09
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CVEList
CVE-2020-26968: Mozilla developers reported memory safety bugs present in Firefox 82 and Firefox ESR 78↗2020-12-09
▶

📋Vendor Advisories

8
Ubuntu
Thunderbird vulnerabilities↗2020-11-25
▶
Ubuntu
Firefox vulnerabilities↗2020-11-19
▶
Ubuntu
Firefox vulnerabilities↗2020-11-18
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Red Hat
Mozilla: Memory safety bugs fixed in Firefox 83 and Firefox ESR 78.5↗2020-11-17
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Debian
CVE-2020-26968: firefox - Mozilla developers reported memory safety bugs present in Firefox 82 and Firefox...↗2020
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CVE-2020-26968 — Out-of-bounds Write in Mozilla Firefox | cvebase