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.

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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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