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CVE Vulnerabilities

CVE-2017-7752

Use After Free

Published: Jun 11, 2018 | Modified: Nov 25, 2025
CVSS 3.x
8.8
HIGH
Source:
NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS 2.x
6.8 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
8.8 MODERATE
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2017-7752
CWEhttps://cwe.mitre.org/data/definitions/416.html

A use-after-free vulnerability during specific user interactions with the input method editor (IME) in some languages due to how events are handled. This results in a potentially exploitable crash but would require specific user interaction to trigger. This vulnerability affects Firefox < 54, Firefox ESR < 52.2, and Thunderbird < 52.2.

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 Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.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-0:52.2.0-1.el6_9*
Red Hat Enterprise Linux 6RedHatthunderbird-0:52.2.0-1.el6_9*
Red Hat Enterprise Linux 7RedHatfirefox-0:52.2.0-1.el7_3*
Red Hat Enterprise Linux 7RedHatthunderbird-0:52.2.0-1.el7_3*
FirefoxUbuntudevel*
FirefoxUbuntutrusty*
FirefoxUbuntuupstream*
FirefoxUbuntuxenial*
FirefoxUbuntuyakkety*
FirefoxUbuntuzesty*
ThunderbirdUbuntudevel*
ThunderbirdUbuntutrusty*
ThunderbirdUbuntuupstream*
ThunderbirdUbuntuxenial*
ThunderbirdUbuntuyakkety*
ThunderbirdUbuntuzesty*

Potential Mitigations

References

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