2021-21779 | WebKit WebKitGTK GraphicsContext use after free (TALOS-2021-1238)
|CVSS Meta Temp Score
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|CTI Interest Score
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A vulnerability, which was classified as critical, was found in WebKit WebKitGTK 2.30.4 (Web Browser). Affected is an unknown code block of the component GraphicsContext. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-416. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:
A use-after-free vulnerability exists in the way Webkit’s GraphicsContext handles certain events in WebKitGTK 2.30.4. A specially crafted web page can lead to a potential information leak and further memory corruption. A victim must be tricked into visiting a malicious web page to trigger this vulnerability.
The weakness was released 07/09/2021 as TALOS-2021-1238. The advisory is shared for download at talosintelligence.com. This vulnerability is traded as CVE-2021-21779 since 01/04/2021. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn’t require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 07/11/2021).
There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.
VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.3
Status: Not defined
0-Day Time: 🔒
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