Buffer overflow in Webkitgtk
CVE-2019-8375
The UIProcess subsystem in WebKit, as used in WebKitGTK through 2.23.90 and WebKitGTK+ through 2.22.6 and other products, does not prevent the script dialog size from exceeding the web view size, which allows remote attackers to cause a denial of service (Buffer Overflow) or possibly have unspecified other impact, related to UIProcess/API/gtk/WebKitScriptDialogGtk.cpp, UIProcess/API/gtk/WebKitScriptDialogImpl.cpp, and UIProcess/API/gtk/WebKitWebViewGtk.cpp, as demonstrated by GNOME Web (aka Epiphany).
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.161 (96.8th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 96.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.161 · newest: 0.161 · change: 0.000
Affected products
- Webkitgtk
- Webkitgtk Webkitgtk\+
- Canonical Ubuntu Linux — versions 18.04, 18.10
- openSUSE Leap — versions 15.0, 42.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- trac.webkit.org/changeset/241515/webkit (Patch, Vendor Advisory)
- www.exploit-db.com/exploits/46465/ (Exploit, VDB Entry, Third Party Advisory, exploit)
- github.com/WebKit/webkit/commit/6f9b511a115311b13c06eb58038ddc2c78da5531 (Patch, Third Party Advisory)
- www.inputzero.io/2019/02/fuzzing-webkit.html (Exploit, Third Party Advisory)
- bugs.webkit.org/show_bug.cgi (Permissions Required, Third Party Advisory, Issue Tracking)
- lists.opensuse.org/opensuse-security-announce/2019-04/msg00058.html (vendor-advisory, Mailing List, Third Party Advisory)
- usn.ubuntu.com/3948-1/ (vendor-advisory, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-05/msg00005.html (vendor-advisory, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-8375?
- CVE-2019-8375 is a critical-severity vulnerability in Webkitgtk, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 9.8/10. Published 2019-02-24.
- How severe is CVE-2019-8375?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2019-8375 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.