CVE-2021-42697
First published: Tue Nov 02 2021(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Akka Http Server | >=10.1.0<10.1.15 | |
| Akka Http Server | >=10.2.0<10.2.7 | |
| >=10.1.0<10.1.15 | ||
| >=10.2.0<10.2.7 |
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Reference Links
- http://packetstormsecurity.com/files/167018/Akka-HTTP-10.1.14-Denial-Of-Service.html
- 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-parsing-user-agent.html
Frequently Asked Questions
What is CVE-2021-42697?
CVE-2021-42697 is a vulnerability in Akka HTTP versions 10.1.x before 10.1.15 and 10.2.x before 10.2.7 that can lead to stack exhaustion while parsing HTTP headers, allowing a remote attacker to conduct a Denial of Service (DoS) attack.
How severe is CVE-2021-42697?
CVE-2021-42697 has a severity rating of 7.5 (high).
How does CVE-2021-42697 affect Akka HTTP?
CVE-2021-42697 affects Akka HTTP versions 10.1.x before 10.1.15 and 10.2.x before 10.2.7.
How can a remote attacker exploit CVE-2021-42697?
A remote attacker can exploit CVE-2021-42697 by sending a User-Agent header with deeply nested comments.
Is there a fix for CVE-2021-42697?
Yes, the fix for CVE-2021-42697 is to upgrade Akka HTTP to version 10.1.15 or 10.2.7 depending on the installed version.
- agent/type
- collector/nvd-index
- agent/software-canonical-lookup-request
- agent/weakness
- agent/references
- agent/severity
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/first-publish-date
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/last-modified-date
- agent/author
- agent/softwarecombine
- agent/tags
- agent/event
- vendor/akka
- canonical/akka http server
- version/akka http server/10.1.0
- version/akka http server/10.2.0