What’s Vulnerable › Vulnerabilities

CVE-2018-12293

• Severity: high (CVSS 8.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 10.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-06-19 · updated 2026-06-17
• Weakness: CWE-190

Description

The getImageData function in the ImageBufferCairo class in WebCore/platform/graphics/cairo/ImageBufferCairo.cpp in WebKit, as used in WebKitGTK+ prior to version 2.20.3 and WPE WebKit prior to version 2.20.1, is vulnerable to a heap-based buffer overflow triggered by an integer overflow, which could be abused by crafted HTML content.

Affected products

• Canonical Ubuntu Linux: 16.04, 17.10, 18.04
• Webkitgtk+: before 2.20.3 — fixed in 2.20.3
• Wpewebkit Wpe Webkit: before 2.20.1 — fixed in 2.20.1

How to fix

Upgrade to a fixed version: Webkitgtk+ 2.20.3; Wpewebkit Wpe Webkit 2.20.1. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/148200/WebKitGTK-Data-Leak-Code-Execution.html
• http://www.openwall.com/lists/oss-security/2018/06/14/1
• http://www.securityfocus.com/archive/1/542087/100/0/threaded
• https://bugs.webkit.org/show_bug.cgi?id=186384
• https://security.gentoo.org/glsa/201808-04
• https://trac.webkit.org/changeset/232618
• https://usn.ubuntu.com/3687-1/
• https://www.exploit-db.com/exploits/45205/
• http://packetstormsecurity.com/files/148200/WebKitGTK-Data-Leak-Code-Execution.html
• http://www.openwall.com/lists/oss-security/2018/06/14/1
• http://www.securityfocus.com/archive/1/542087/100/0/threaded
• https://bugs.webkit.org/show_bug.cgi?id=186384

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