Vulnerability Monitor

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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.

Published

2021-11-02T22:15:08.957

Last Modified

2024-11-21T06:27:59.610

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-674

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	akka	http_server	< 10.1.15	Yes
Application	akka	http_server	< 10.2.7	Yes

References

http://packetstormsecurity.com/files/167018/Akka-HTTP-10.1.14-Denial-Of-Service.html Exploit, Third Party Advisory, VDB Entry ([email protected])
https://akka.io/blog/ Vendor Advisory ([email protected])
https://akka.io/blog/news/2021/11/02/akka-http-10.2.7-released Release Notes, Vendor Advisory ([email protected])
https://akka.io/blog/news/2021/11/22/akka-http-10.1.15-released Release Notes, Vendor Advisory ([email protected])
https://doc.akka.io/docs/akka-http/current/security/2021-CVE-2021-42697-stack-overflow-parsing-user-agent.html Vendor Advisory ([email protected])
http://packetstormsecurity.com/files/167018/Akka-HTTP-10.1.14-Denial-Of-Service.html Exploit, Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://akka.io/blog/ Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://akka.io/blog/news/2021/11/02/akka-http-10.2.7-released Release Notes, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://akka.io/blog/news/2021/11/22/akka-http-10.1.15-released Release Notes, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://doc.akka.io/docs/akka-http/current/security/2021-CVE-2021-42697-stack-overflow-parsing-user-agent.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)