CVE-2020-1898: High severity facebook hiphop virtual machine vulnerability
The fbunserialize function did not impose a depth limit for nested deserialization. That meant a maliciously constructed string could cause deserialization to recurse, leading to stack exhaustion. 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.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is CVE-2020-1898?
CVE-2020-1898 is a vulnerability in the fb_unserialize function in HHVM that could lead to stack exhaustion due to nested deserialization without a depth limit.
Which software versions are affected by CVE-2020-1898?
CVE-2020-1898 affects HHVM versions 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, and 4.62.0.
What is the severity of CVE-2020-1898?
CVE-2020-1898 has a severity rating of 7.5 out of 10, classified as high.
How can the CVE-2020-1898 vulnerability be exploited?
The CVE-2020-1898 vulnerability can be exploited by utilizing a maliciously constructed string to cause nested deserialization, leading to stack exhaustion.
Are there any patches or security updates available for CVE-2020-1898?
Yes, patches and security updates are available for CVE-2020-1898. It is recommended to update HHVM to version 4.32.3 or newer to fix the vulnerability.