Heap-based Buffer Overflow in WebKitGTK+ and WPE WebKit
CVE-2018-12293

8.8HIGH

Key Information:

Vendor

Canonical

Status
Ubuntu Linux
Vendor
CVE Published:
19 June 2018

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 38%

What is CVE-2018-12293?

The getImageData function within the ImageBufferCairo class in WebCore is susceptible to a heap-based buffer overflow due to an integer overflow. This vulnerability can be exploited through specially crafted HTML content, posing a significant security risk in affected versions of WebKitGTK+ and WPE WebKit.

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Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2018-12293 - Proof of Concept

References

https://bugs.webkit.org/show_bug.cgi?id=186384
x_refsource_MISC
https://security.gentoo.org/glsa/201808-04
vendor-advisoryx_refsource_GENTOO
http://www.securityfocus.com/archive/1/542087/100/0/threaded
mailing-listx_refsource_BUGTRAQ

EPSS Score

38% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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