Insufficient Boundary Checks in HHVM's GD Extension
CVE-2019-11926

9.8CRITICAL

Key Information:

Vendor

Facebook

Status
Hhvm
Vendor
CVE Published:
6 September 2019

What is CVE-2019-11926?

The vulnerability in HHVM's GD extension arises from insufficient boundary checks when parsing M_SOFx markers from JPEG headers. This flaw can lead to access to out-of-bounds memory when processing a constructed malformed JPEG, potentially exposing the application to further exploits. Users are advised to update to the latest versions to mitigate this risk.

Affected Version(s)

HHVM 4.21.0

HHVM 4.20.2

HHVM 4.20.0

References

https://hhvm.com/blog/2019/09/03/security-update.html
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https://github.com/facebook/hhvm/commit/f9680d21beaa9eb39...
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https://www.facebook.com/security/advisories/cve-2019-11926
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CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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