Vulnerability Details : CVE-2018-12293
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.
Vulnerability category: OverflowMemory Corruption
Products affected by CVE-2018-12293
- cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
- cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*
- cpe:2.3:a:webkitgtk:webkitgtk\+:*:*:*:*:*:*:*:*
- cpe:2.3:a:wpewebkit:wpe_webkit:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2018-12293
42.80%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 97 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2018-12293
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.8
|
MEDIUM | AV:N/AC:M/Au:N/C:P/I:P/A:P |
8.6
|
6.4
|
NIST | |
|
8.8
|
HIGH | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
NIST |
CWE ids for CVE-2018-12293
-
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.Assigned by: nvd@nist.gov (Primary)
-
The product writes data past the end, or before the beginning, of the intended buffer.Assigned by: nvd@nist.gov (Primary)
References for CVE-2018-12293
-
http://www.securityfocus.com/archive/1/542087/100/0/threaded
SecurityFocus
-
https://trac.webkit.org/changeset/232618
Changeset 232618 – WebKitPatch;Third Party Advisory;Vendor Advisory
-
https://bugs.webkit.org/show_bug.cgi?id=186384
Bug Access DeniedPermissions Required;Vendor Advisory
-
https://www.exploit-db.com/exploits/45205/
WebkitGTK+ 2.20.3 - 'ImageBufferCairo::getImageData()' Buffer Overflow (PoC)
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https://usn.ubuntu.com/3687-1/
USN-3687-1: WebKitGTK+ vulnerabilities | Ubuntu security noticesThird Party Advisory
-
http://www.openwall.com/lists/oss-security/2018/06/14/1
oss-security - WebKitGTK+ and WPE WebKit Security Advisory WSA-2018-0005Mailing List;Technical Description
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http://packetstormsecurity.com/files/148200/WebKitGTK-Data-Leak-Code-Execution.html
WebKitGTK+ Data Leak / Code Execution ≈ Packet StormThird Party Advisory;VDB Entry
-
https://security.gentoo.org/glsa/201808-04
WebkitGTK+: Multiple vulnerabilities (GLSA 201808-04) — Gentoo security
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