Vulnerability in Webkitgtk
CVE-2021-42762
BubblewrapLauncher.cpp in WebKitGTK and WPE WebKit before 2.34.1 allows a limited sandbox bypass that allows a sandboxed process to trick host processes into thinking the sandboxed process is not confined by the sandbox, by abusing VFS syscalls that manipulate its filesystem namespace. The impact is limited to host services that create UNIX sockets that WebKit mounts inside its sandbox, and the sandboxed process remains otherwise confined. NOTE: this is similar to CVE-2021-41133.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.005 (43.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Webkitgtk
- Wpewebkit Wpe Webkit
- Debian Linux — versions 10.0, 11.0
- Fedoraproject Fedora — versions 33, 34, 35
References
- github.com/flatpak/flatpak/security/advisories/GHSA-67h7-w3jq-vh4q (Third Party Advisory)
- bugs.webkit.org/show_bug.cgi (Exploit, Issue Tracking, Vendor Advisory)
- www.openwall.com/lists/oss-security/2021/10/26/9 (mailing-list, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2021/10/27/1 (mailing-list, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2021/10/27/2 (mailing-list, Mailing List, Third Party Advisory)
- www.openwall.com/lists/oss-security/2021/10/27/4 (mailing-list, Mailing List, Third Party Advisory)
- www.debian.org/security/2021/dsa-4995 (vendor-advisory, Third Party Advisory)
- www.debian.org/security/2021/dsa-4996 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
Frequently asked questions
- What is CVE-2021-42762?
- CVE-2021-42762 is a medium-severity vulnerability in Webkitgtk. CVSS score: 5.3/10. Published 2021-10-20.
- How severe is CVE-2021-42762?
- Medium severity. CVSS v3 base score is 5.3 out of 10.