CVE-2019-11757 — Use After Free in Mozilla Firefox

CWE-416 — Use After Free14 documents8 sources
Severity
8.8HIGHNVD
OSV7.5
EPSS
1.4%
top 19.62%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Mozilla ThunderbirdMozilla FirefoxMozilla Firefox ESR+1 more
Timeline
PublishedJan 8
Latest updateMay 24

Description

When following the value's prototype chain, it was possible to retain a reference to a locale, delete it, and subsequently reference it. This resulted in a use-after-free and a potentially exploitable crash. This vulnerability affects Firefox < 70, Thunderbird < 68.2, and Firefox ESR < 68.2.

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 Packages8 packages

▶NVDmozilla/firefox< 70.0
▶CVEListV5mozilla/firefoxbefore 70
▶CVEListV5mozilla/firefox_esrbefore 68.2

Also affects: Ubuntu Linux 16.04

🔴Vulnerability Details

6
GHSA
GHSA-fxjq-wqq4-mf6x: When following the value's prototype chain, it was possible to retain a reference to a locale, delete it, and subsequently reference it↗2022-05-24
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OSV
thunderbird vulnerabilities↗2020-04-21
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CVEList
CVE-2019-11757: When following the value's prototype chain, it was possible to retain a reference to a locale, delete it, and subsequently reference it↗2020-01-08
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OSV
CVE-2019-11757: When following the value's prototype chain, it was possible to retain a reference to a locale, delete it, and subsequently reference it↗2020-01-08
▶
OSV
thunderbird regression↗2019-12-10
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📋Vendor Advisories

6
Ubuntu
Thunderbird vulnerabilities↗2020-04-21
▶
Ubuntu
Thunderbird regression↗2019-12-10
▶
Ubuntu
Thunderbird vulnerabilities↗2019-11-26
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Ubuntu
Firefox vulnerabilities↗2019-10-23
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Red Hat
Mozilla: Use-after-free when creating index updates in IndexedDB↗2019-10-22
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💬Community

1
Bugzilla
CVE-2019-11757 Mozilla: Use-after-free when creating index updates in IndexedDB↗2019-10-23
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CVE-2019-11757 — Use After Free in Mozilla Firefox | cvebase