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.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Akka HTTP 10.1.14 - Denial of Service EDB-50892 · remote · May 11, 2022
GitHub 1 repository
-
cxosmo/CVE-2021-42697 ★ 1 · Apr 24, 2022
Proof of concept exploit for CVE-2021-42697: 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 cond…
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | com.typesafe.akka:aakka-http-core_2.13.0-M3 | >= 10.1.0 | — | GHSA-3hw2-h67c-wq66 |
| Maven | com.typesafe.akka:akka-http-core_2.11 | >= 10.1.0, < 10.1.15 | 10.1.15 | GHSA-3hw2-h67c-wq66 |
| Maven | com.typesafe.akka:akka-http-core_2.12 | >= 10.1.0, < 10.1.15 | 10.1.15 | GHSA-3hw2-h67c-wq66 |
| Maven | com.typesafe.akka:akka-http-core_2.12 | >= 10.2.0-M1, < 10.2.7 | 10.2.7 | GHSA-3hw2-h67c-wq66 |
| Maven | com.typesafe.akka:akka-http-core_2.13 | >= 10.1.0, < 10.1.15 | 10.1.15 | GHSA-3hw2-h67c-wq66 |
| Maven | com.typesafe.akka:akka-http-core_2.13 | >= 10.2.0-M1, < 10.2.7 | 10.2.7 | GHSA-3hw2-h67c-wq66 |
| Maven | com.typesafe.akka:akka-http-core_2.13.0-M5 | >= 10.1.0 | — | GHSA-3hw2-h67c-wq66 |
| Maven | com.typesafe.akka:akka-http-core_2.13.0-RC2 | >= 10.1.0 | — | GHSA-3hw2-h67c-wq66 |
| Maven | com.typesafe.akka:akka-http-core_2.13.0-RC3 | >= 10.1.0 | — | GHSA-3hw2-h67c-wq66 |
References
- https://akka.io/blog/
- https://doc.akka.io/docs/akka-http/current/security/2021-CVE-2021-42697-stack-overflow-parsing-user-agent.html
- https://akka.io/blog/news/2021/11/02/akka-http-10.2.7-released
- https://akka.io/blog/news/2021/11/22/akka-http-10.1.15-released
- http://packetstormsecurity.com/files/167018/Akka-HTTP-10.1.14-Denial-Of-Service.html