CVE-2020-15669 — Use After Free in Mozilla Firefox ESR

CWE-416 — Use After Free9 documents8 sources
Severity
8.8HIGHNVD
EPSS
0.5%
top 36.26%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla Firefox ESRMozilla Thunderbird
Timeline
PublishedOct 1
Latest updateMay 24

Description

When aborting an operation, such as a fetch, an abort signal may be deleted while alerting the objects to be notified. This results in a use-after-free and we presume that with enough effort it could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 68.12 and Thunderbird < 68.12.

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 Packages5 packages

▶CVEListV5mozilla/firefox_esrunspecified — 68.12
▶CVEListV5mozilla/thunderbirdunspecified — 68.12
▶NVDmozilla/firefox_esr< 68.12
▶NVDmozilla/thunderbird< 68.12
▶Debianmozilla/thunderbird< 1:68.12.0-1+3

🔴Vulnerability Details

3
GHSA
GHSA-8vqh-gxqj-vj4q: When aborting an operation, such as a fetch, an abort signal may be deleted while alerting the objects to be notified↗2022-05-24
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CVEList
CVE-2020-15669: When aborting an operation, such as a fetch, an abort signal may be deleted while alerting the objects to be notified↗2020-10-01
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OSV
CVE-2020-15669: When aborting an operation, such as a fetch, an abort signal may be deleted while alerting the objects to be notified↗2020-10-01
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📋Vendor Advisories

4
Red Hat
Mozilla: Use-After-Free when aborting an operation↗2020-08-25
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Debian
CVE-2020-15669: firefox-esr - When aborting an operation, such as a fetch, an abort signal may be deleted whil...↗2020
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Mozilla
Mozilla Foundation Security Advisory 2020-37: CVE-2020-15669↗
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Mozilla
Mozilla Foundation Security Advisory 2020-40: CVE-2020-15669↗
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💬Community

1
Bugzilla
CVE-2020-15669 Mozilla: Use-After-Free when aborting an operation↗2020-08-26
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CVE-2020-15669 — Use After Free in Mozilla Firefox ESR | cvebase