CVE-2021-21806

Advisory lineage Upstream: 0 Downstream: 11
Modified
Published: 08 Jul 2021, 11:06
Last modified:03 Aug 2024, 18:23

Vulnerability Summary

Overall Risk (default)
medium
46/100
CVSS Score
8.8 HIGH
v3.0 (cve.org)
EPSS Score
2.07% LOW
2% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

08 Jul 2021, 11:06
Published
Vulnerability first disclosed
03 Aug 2024, 18:23
Last Modified
Vulnerability information updated

Description

An exploitable use-after-free vulnerability exists in WebKitGTK browser version 2.30.3 x64. A specially crafted HTML web page can cause a use-after-free condition, resulting in remote code execution. The victim needs to visit a malicious web site to trigger the vulnerability.

CVSS Metrics

  • v3.1•HIGH•Score: 8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  • v3.0•HIGH•Score: 8.8CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  • v2.0•MEDIUM•Score: 6.8AV:N/AC:M/Au:N/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 2.07%• Percentile: 84%

Techniques & Countermeasures

  • CWE-416•Use After Free

    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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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 Systems

  • Unknown•WebKitGTK

    2.30.3

References (2)