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 conduct a Denial of Service attack by sending a User-Agent header with deeply nested comments.

CVSS v3.1 NVD

7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0 NVD

5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS

36.14% chance of exploitation in the next 30 days, 98th percentile

Published

2021-11-02

Updated

2024-08-04

Proof-of-concept exploits (2)

• http://packetstormsecurity.com/files/167018/Akka-HTTP-10.1.14-Denial-Of-Service.html
• cxosmo/CVE-2021-426971★ · 2022-06-26

ExploitDB entries (1)

• https://www.exploit-db.com/exploits/50892

Security advisories

• https://akka.io/blog
• 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
• https://doc.akka.io/docs/akka-http/current/security/2021-CVE-2021-42697-stack-overflow-pa…
• advisories/GHSA-3hw2-h67c-wq66

References

• CVE Record
• NVD entry

Related

• CVE-2022-29548