CVE-2017-7802: debian debian_linux Use After Free

Vulnerability summary

CVE-2017-7802 is a critical (CVSS 9.8) Use After Free vulnerability in debian debian_linux. EPSS estimates a 2.62% chance of exploitation in the next 30 days, higher than 85.2% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 11-06-2018
   PublishedVulnerability first disclosed.
2. 05-08-2024
   Last modifiedVulnerability information updated.

Description

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.

• CWE-416Use After FreeThe 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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.