CVE-2021-33580
The attacker doesn't have to use a browser and may send a specially crafted Referer header programmatically.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.30%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 3.30% probability · 88th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-400
- Affected
- apache/roller
- Source
- security@apache.org
References
- http://www.openwall.com/lists/oss-security/2021/08/18/1Mailing List, Third Party Advisory
- https://lists.apache.org/thread.html/r9d967d80af941717573e531db2c7353a90bfd0886e9b5d5d79f75506%40%3Cuser.roller.apache.org%3EMailing List, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2021/08/18/1Mailing List, Third Party Advisory
- https://lists.apache.org/thread.html/r9d967d80af941717573e531db2c7353a90bfd0886e9b5d5d79f75506%40%3Cuser.roller.apache.org%3EMailing List, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.