VulnerabilityModified
CVE-2021-21775
A use-after-free vulnerability exists in the way certain events are processed for ImageLoader objects of Webkit WebKitGTK 2.30.4.
HIGH 8.0EPSS 1.26%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.26%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A use-after-free vulnerability exists in the way certain events are processed for ImageLoader objects of Webkit WebKitGTK 2.30.4. A specially crafted web page can lead to a potential information leak and further memory corruption. In order to trigger the vulnerability, a victim must be tricked into visiting a malicious webpage.
- CVSS 3.1
- 8.0 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 1.26% probability · 68th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- webkitgtk/webkitgtk · fedoraproject/fedora · debian/debian linux
- Source
- talos-cna@cisco.com
References
- http://www.openwall.com/lists/oss-security/2021/07/23/1Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KYMMBQN4PRVDLMIJT2LY2BWHLYBD57P3/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V4QORERLPDN3UNNJFJSOMHZZCU2G75Q6/
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1229Exploit, Technical Description, Third Party Advisory
- https://www.debian.org/security/2021/dsa-4945Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/07/23/1Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KYMMBQN4PRVDLMIJT2LY2BWHLYBD57P3/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/V4QORERLPDN3UNNJFJSOMHZZCU2G75Q6/
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1229Exploit, Technical Description, Third Party Advisory
- https://www.debian.org/security/2021/dsa-4945Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.