CVE-2021-32723

Regular Expression Denial of Service (ReDoS) in Prism

Description

Prism is a syntax highlighting library. Some languages before 1.24.0 are vulnerable to Regular Expression Denial of Service (ReDoS). When Prism is used to highlight untrusted (user-given) text, an attacker can craft a string that will take a very very long time to highlight. This problem has been fixed in Prism v1.24. As a workaround, do not use ASCIIDoc or ERB to highlight untrusted text. Other languages are not affected and can be used to highlight untrusted text.

Category

7.4
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.37%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory oracle.com
Affected: PrismJS prism
Published at:
Updated at:

References

Link Tags
https://github.com/PrismJS/prism/security/advisories/GHSA-gj77-59wh-66hg third party advisory
https://github.com/PrismJS/prism/pull/2688 third party advisory patch
https://github.com/PrismJS/prism/pull/2774 third party advisory patch
https://www.oracle.com/security-alerts/cpujan2022.html third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-32723?
CVE-2021-32723 has been scored as a high severity vulnerability.
How to fix CVE-2021-32723?
To fix CVE-2021-32723, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-32723 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-32723 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-32723?
CVE-2021-32723 affects PrismJS prism.
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