CVE-2021-24025 Integer overflow in HHVM

What is CVE-2021-24025?

CVE-2021-24025 is a critical vulnerability in Facebook HHVM, published on 10 Mar 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-190, CWE-122

Which versions are affected by CVE-2021-24025?

It affects 1 product.

Products include Facebook Hhvm.

How do I fix CVE-2021-24025?

No fix has been published for CVE-2021-24025 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-24025 being exploited?

There is no known exploitation of CVE-2021-24025 in the wild and no public exploit code.

Other vulnerabilities in Facebook HHVM

• CVE-2022-36937 HHVM 4.172.0 and all prior versions use TLS 1.0 for secure connections when handling tls:// URLs in the stream extension. Critical 9.8
• CVE-2020-1900 Use after free in HHVM Critical 9.8
• CVE-2020-1916 Integer overflow in HHVM Critical 9.8
• CVE-2020-1917 Memory corruption in HHVM Critical 9.8
• CVE-2016-1000004 Other in n/a Critical 9.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-cc9j-57m4-w285, UBUNTU-CVE-2021-24025.