Resource exhaustion in Apache Roller
CVE-2021-33580
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.
Vulnerability class: DoS (Denial of Service)
EPSS: 0.033 (87.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Apache Roller
- Apache Software Foundation Roller — versions Apache Roller
Weakness classification (CWE)
References
- security@apache.org (Mailing List, x_refsource_MISC, Vendor Advisory)
- security@apache.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-33580?
- CVE-2021-33580 is a high-severity vulnerability in Apache Roller, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2021-08-18.
- How severe is CVE-2021-33580?
- High severity. CVSS v3 base score is 7.5 out of 10.