CVEvulnerability
CVE-2021-42697
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2021-11-02
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:N/A:P
- Weaknesses
- CWE-674
Description
Akka HTTP 10.1.x before 10.1.15 and 10.2.x before 10.2.7 can encounter stack exhaustion while parsing HTTP headers, which allows a remote attacker to conduct a Denial of Service attack by sending a User-Agent header with deeply nested comments.
Affected configurations
• akka http server (>= 10.1.0 < 10.1.15)
• akka http server (>= 10.2.0 < 10.2.7)
Related
Weakness · CWE (1)
- CWE-674 Uncontrolled Recursion weakness
References
- http://packetstormsecurity.com/files/167018/Akka-HTTP-10.1.14-Denial-Of-Service.html Exploit, Third Party Advisory, VDB Entry
- https://akka.io/blog/ Vendor Advisory
- https://akka.io/blog/news/2021/11/02/akka-http-10.2.7-released Release Notes, Vendor Advisory
- https://akka.io/blog/news/2021/11/22/akka-http-10.1.15-released Release Notes, Vendor Advisory
- https://doc.akka.io/docs/akka-http/current/security/2021-CVE-2021-42697-stack-overflow-parsing-user-agent.html Vendor Advisory
- http://packetstormsecurity.com/files/167018/Akka-HTTP-10.1.14-Denial-Of-Service.html Exploit, Third Party Advisory, VDB Entry
- https://akka.io/blog/ Vendor Advisory
- https://akka.io/blog/news/2021/11/02/akka-http-10.2.7-released Release Notes, Vendor Advisory
- https://akka.io/blog/news/2021/11/22/akka-http-10.1.15-released Release Notes, Vendor Advisory
- https://doc.akka.io/docs/akka-http/current/security/2021-CVE-2021-42697-stack-overflow-parsing-user-agent.html Vendor Advisory