How does CVE-2020-1899 affect HHVM?

CVE-2020-1899 affects HHVM versions prior to v4.32.3, between versions 4.33.0 and 4.56.0.

What is the severity of CVE-2020-1899?

CVE-2020-1899 has a severity rating of 7.5 (High).

How can I fix CVE-2020-1899?

To fix CVE-2020-1899, you should update HHVM to version 4.56.1 or later.

Vulnerability/
CVE-2020-1899

high

7.5

CWE

119 822

11/3/2021

4/8/2024

CVE-2020-1899: Buffer Overflow

Q: What is CVE-2020-1899?

CVE-2020-1899 is a vulnerability in HHVM that allowed arbitrary memory addresses to be accessed as if they were static StringData objects.

Q: Where can I find more information about CVE-2020-1899?

You can find more information about CVE-2020-1899 at the following references: [link1](https://github.com/facebook/hhvm/commit/1107228a5128d3ca1c4add8ac1635d933cbbe2e9) and [link2](https://hhvm.com/blog/2020/06/30/security-update.html).

First published: Thu Mar 11 2021(Updated: )

The unserialize() function supported a type code, "S", which was meant to be supported only for APC serialization. This type code allowed arbitrary memory addresses to be accessed as if they were static StringData objects. This issue affected HHVM prior to v4.32.3, between versions 4.33.0 and 4.56.0, 4.57.0, 4.58.0, 4.58.1, 4.59.0, 4.60.0, 4.61.0, 4.62.0.

Credit: cve-assign@fb.com

Affected Software	Affected Version	How to fix
Facebook HHVM	<4.32.3
Facebook HHVM	>=4.33.0<4.56.1
Facebook HHVM	=4.57.0
Facebook HHVM	=4.58.0
Facebook HHVM	=4.58.1
Facebook HHVM	=4.59.0
Facebook HHVM	=4.60.0
Facebook HHVM	=4.61.0
Facebook HHVM	=4.62.0

Remedy

https://github.com/facebook/hhvm/commit/1107228a5128d3ca1c4add8ac1635d933cbbe2e9

Never miss a vulnerability like this again

Reference Links

Frequently Asked Questions

What is CVE-2020-1899?
CVE-2020-1899 is a vulnerability in HHVM that allowed arbitrary memory addresses to be accessed as if they were static StringData objects.
How does CVE-2020-1899 affect HHVM?
CVE-2020-1899 affects HHVM versions prior to v4.32.3, between versions 4.33.0 and 4.56.0.
What is the severity of CVE-2020-1899?
CVE-2020-1899 has a severity rating of 7.5 (High).
How can I fix CVE-2020-1899?
To fix CVE-2020-1899, you should update HHVM to version 4.56.1 or later.
Where can I find more information about CVE-2020-1899?
You can find more information about CVE-2020-1899 at the following references: [link1](https://github.com/facebook/hhvm/commit/1107228a5128d3ca1c4add8ac1635d933cbbe2e9) and [link2](https://hhvm.com/blog/2020/06/30/security-update.html).

collector/nvd-index
agent/references
agent/severity
agent/weakness
agent/author
agent/event
agent/type
agent/description
agent/remedy
agent/softwarecombine
agent/last-modified-date
agent/first-publish-date
agent/tags
collector/mitre-cve
source/MITRE
vendor/facebook
canonical/facebook hhvm
version/facebook hhvm/4.33.0
version/facebook hhvm/4.57.0
version/facebook hhvm/4.58.0
version/facebook hhvm/4.58.1
version/facebook hhvm/4.59.0
version/facebook hhvm/4.60.0
version/facebook hhvm/4.61.0
version/facebook hhvm/4.62.0

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