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CVE Vulnerabilities

CVE-2017-7802

Use After Free

Published: Jun 11, 2018 | Modified: Nov 25, 2025
CVSS 3.x
9.8
CRITICAL
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
7.5 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
9.8 IMPORTANT
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2017-7802
CWEhttps://cwe.mitre.org/data/definitions/416.html

A use-after-free vulnerability can occur when manipulating the DOM during the resize event of an image element. If these elements have been freed due to a lack of strong references, a potentially exploitable crash may occur when the freed elements are accessed. This vulnerability affects Thunderbird < 52.3, Firefox ESR < 52.3, and Firefox < 55.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

NameVendorStart VersionEnd Version
Debian_linuxDebian8.0 (including)8.0 (including)
Debian_linuxDebian9.0 (including)9.0 (including)
Red Hat Enterprise Linux 6RedHatfirefox-0:52.3.0-3.el6_9*
Red Hat Enterprise Linux 6RedHatthunderbird-0:52.3.0-1.el6_9*
Red Hat Enterprise Linux 7RedHatfirefox-0:52.3.0-2.el7_4*
Red Hat Enterprise Linux 7RedHatthunderbird-0:52.3.0-1.el7_4*
FirefoxUbuntuartful*
FirefoxUbuntubionic*
FirefoxUbuntucosmic*
FirefoxUbuntudevel*
FirefoxUbuntudisco*
FirefoxUbuntutrusty*
FirefoxUbuntuupstream*
FirefoxUbuntuxenial*
FirefoxUbuntuzesty*
Mozjs38Ubuntuartful*
Mozjs38Ubuntuzesty*
ThunderbirdUbuntuartful*
ThunderbirdUbuntubionic*
ThunderbirdUbuntucosmic*
ThunderbirdUbuntudevel*
ThunderbirdUbuntudisco*
ThunderbirdUbuntutrusty*
ThunderbirdUbuntuupstream*
ThunderbirdUbuntuxenial*
ThunderbirdUbuntuzesty*

Potential Mitigations

References

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