Vulnerability · Published Aug 18, 2021 · Assigned by apache

CVE-2021-33580regex injection leading to DoS

High 7.5

In plain English

A high-severity uncontrolled resource consumption in Apache Roller from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 3.3% (higher than 89% of all known vulnerabilities).

Severity (CVSS NVD)7.5High

Exploit odds (30 days)3.3%top 11.4% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

User controlled `request.getHeader("Referer")`, `request.getRequestURL()` and `request.getQueryString()` are used to build and run a regex expression. The attacker doesn't have to use a browser and may send a specially crafted Referer header programmatically. Since the attacker controls the string and the regex pattern he may cause a ReDoS by regex catastrophic backtracking on the server side. This problem has been fixed in Roller 6.0.2.

Affected products (as reported)

Vendor	Product	Versions
Apache Software Foundation	Apache Roller	Apache Roller – before 6.0.2

Weakness: CWE-400

References

https://lists.apache.org/thread.html/r9d967d80af941717573e531db2c7353a90bfd0886e9b5d5d79f75506%40%3Cuser.roller.apache.org%3E x_refsource_MISC
[oss-security] 20210817 CVE-2021-33580: Apache Roller: regex injection leading to DoS mailing-list, x_refsource_MLIST