Pattern Redirects in Liferay Portal 7.4.3.48 through 7.4.3.76, and Liferay DXP 7.4 update 48 through 76 allows regular expressions that are vulnerable to ReDoS attacks to be used as patterns, which allows remote attackers to consume an excessive amount of server resources via crafted request URLs.
The product uses a regular expression with an inefficient, possibly exponential worst-case computational complexity that consumes excessive CPU cycles.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Digital_experience_platform | Liferay | 7.4-update48 (including) | 7.4-update48 (including) |
| Digital_experience_platform | Liferay | 7.4-update76 (including) | 7.4-update76 (including) |
| Liferay_portal | Liferay | 7.4.3.48 (including) | 7.4.3.76 (including) |
Attackers can create crafted inputs that
intentionally cause the regular expression to use
excessive backtracking in a way that causes the CPU
consumption to spike.