CVE-2021-24025: Integer Overflow
First published: Wed Mar 10 2021(Updated: )
Due to incorrect string size calculations inside the preg_quote function, a large input string passed to the function can trigger an integer overflow leading to a heap overflow. This issue affects HHVM versions prior to 4.56.3, all versions between 4.57.0 and 4.80.1, all versions between 4.81.0 and 4.93.1, and versions 4.94.0, 4.95.0, 4.96.0, 4.97.0, 4.98.0.
Credit: cve-assign@fb.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Facebook HHVM | <4.56.3 | |
| Facebook HHVM | >=4.57.0<=4.80.1 | |
| Facebook HHVM | >=4.81.0<=4.93.1 | |
| Facebook HHVM | =4.94.0 | |
| Facebook HHVM | =4.95.0 | |
| Facebook HHVM | =4.96.0 | |
| Facebook HHVM | =4.97.0 | |
| Facebook HHVM | =4.98.0 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2021-24025.
What is the severity of CVE-2021-24025?
CVE-2021-24025 has a severity rating of critical.
Which software versions are affected by CVE-2021-24025?
CVE-2021-24025 affects HHVM versions prior to 4.56.3, all versions between 4.57.0 and 4.80.1, and all versions between 4.81.0 and 4.93.1.
How can CVE-2021-24025 be exploited?
CVE-2021-24025 can be exploited by passing a large input string to the preg_quote function, triggering an integer overflow and leading to a heap overflow.
Is there a fix available for CVE-2021-24025?
Yes, the fix for CVE-2021-24025 is included in HHVM version 4.56.3 and later.
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- agent/tags
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- agent/remedy
- agent/softwarecombine
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- vendor/facebook
- canonical/facebook hhvm
- version/facebook hhvm/4.57.0
- version/facebook hhvm/4.80.1
- version/facebook hhvm/4.81.0
- version/facebook hhvm/4.93.1
- version/facebook hhvm/4.94.0
- version/facebook hhvm/4.95.0
- version/facebook hhvm/4.96.0
- version/facebook hhvm/4.97.0
- version/facebook hhvm/4.98.0