VulnerabilityModified
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.
HIGH 7.5EPSS 36.1%
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 36.1%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.
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.
- 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
- 36.14% probability · 98th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-674
- Affected
- akka/http server
- Source
- cve@mitre.org
References
- http://packetstormsecurity.com/files/167018/Akka-HTTP-10.1.14-Denial-Of-Service.htmlExploit, Third Party Advisory, VDB Entry
- https://akka.io/blog/Vendor Advisory
- https://akka.io/blog/news/2021/11/02/akka-http-10.2.7-releasedRelease Notes, Vendor Advisory
- https://akka.io/blog/news/2021/11/22/akka-http-10.1.15-releasedRelease Notes, Vendor Advisory
- https://doc.akka.io/docs/akka-http/current/security/2021-CVE-2021-42697-stack-overflow-parsing-user-agent.htmlVendor Advisory
- http://packetstormsecurity.com/files/167018/Akka-HTTP-10.1.14-Denial-Of-Service.htmlExploit, Third Party Advisory, VDB Entry
- https://akka.io/blog/Vendor Advisory
- https://akka.io/blog/news/2021/11/02/akka-http-10.2.7-releasedRelease Notes, Vendor Advisory
- https://akka.io/blog/news/2021/11/22/akka-http-10.1.15-releasedRelease Notes, Vendor Advisory
- https://doc.akka.io/docs/akka-http/current/security/2021-CVE-2021-42697-stack-overflow-parsing-user-agent.htmlVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.