CVE-2021-24036 Integer overflow in HHVM
An integer overflow in the folly library allows attackers to trigger an out-of-bounds heap write, potentially leading to remote code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-24036?
CVE-2021-24036 is a critical vulnerability in Facebook HHVM, published on 23 Jul 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Passing an attacker controlled size when creating an IOBuf could cause integer overflow, leading to an out of bounds write on the heap with the possibility of remote code execution. This issue affects versions of folly prior to v2021.07.22.00. This issue affects HHVM versions prior to 4.80.5, all versions between 4.81.0 and 4.102.1, all versions between 4.103.0 and 4.113.0, and versions 4.114.0, 4.115.0, 4.116.0, 4.117.0, 4.118.0 and 4.118.1.
Which versions are affected by CVE-2021-24036?
It affects 2 products.
Products include Facebook Folly, Facebook Hhvm.
How do I fix CVE-2021-24036?
No fix has been published for CVE-2021-24036 yet. Limit exposure of the affected software until one is available.
Is CVE-2021-24036 being exploited?
There is no known exploitation of CVE-2021-24036 in the wild and no public exploit code.
Other vulnerabilities in Facebook HHVM
Sources
Also known as GHSA-67g7-384p-p2gv, UBUNTU-CVE-2021-24036.