CVE-2021-42697
Akka HTTP HTTP Header Comment Injection Denial of Service Vulnerability
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.
INFO
Published Date :
Nov. 2, 2021, 10:15 p.m.
Last Modified :
Nov. 21, 2024, 6:27 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2021-42697 has a 4 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-42697.
| URL | Resource |
|---|---|
| http://packetstormsecurity.com/files/167018/Akka-HTTP-10.1.14-Denial-Of-Service.html | Exploit Third Party Advisory VDB Entry |
| https://akka.io/blog/ | Vendor Advisory |
| https://akka.io/blog/news/2021/11/02/akka-http-10.2.7-released | Release Notes Vendor Advisory |
| https://akka.io/blog/news/2021/11/22/akka-http-10.1.15-released | Release Notes Vendor Advisory |
| https://doc.akka.io/docs/akka-http/current/security/2021-CVE-2021-42697-stack-overflow-parsing-user-agent.html | Vendor Advisory |
| http://packetstormsecurity.com/files/167018/Akka-HTTP-10.1.14-Denial-Of-Service.html | Exploit Third Party Advisory VDB Entry |
| https://akka.io/blog/ | Vendor Advisory |
| https://akka.io/blog/news/2021/11/02/akka-http-10.2.7-released | Release Notes Vendor Advisory |
| https://akka.io/blog/news/2021/11/22/akka-http-10.1.15-released | Release Notes Vendor Advisory |
| https://doc.akka.io/docs/akka-http/current/security/2021-CVE-2021-42697-stack-overflow-parsing-user-agent.html | Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
All CVE - PoC in GitHub
poc proofofconcept tester allcve cvegithub cvenew cvepoc cveupdate
None
None
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 conduct a Denial of Service attack by sending a User-Agent header with deeply nested comments.
Python Scala
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-42697 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-42697 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference http://packetstormsecurity.com/files/167018/Akka-HTTP-10.1.14-Denial-Of-Service.html Added Reference https://akka.io/blog/ Added Reference https://akka.io/blog/news/2021/11/02/akka-http-10.2.7-released Added Reference https://akka.io/blog/news/2021/11/22/akka-http-10.1.15-released Added Reference https://doc.akka.io/docs/akka-http/current/security/2021-CVE-2021-42697-stack-overflow-parsing-user-agent.html -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Reanalysis by [email protected]
Jun. 13, 2022
Action Type Old Value New Value Changed Reference Type http://packetstormsecurity.com/files/167018/Akka-HTTP-10.1.14-Denial-Of-Service.html Exploit, Third Party Advisory http://packetstormsecurity.com/files/167018/Akka-HTTP-10.1.14-Denial-Of-Service.html Exploit, Third Party Advisory, VDB Entry Changed CPE Configuration OR *cpe:2.3:a:akka:http_server:*:*:*:*:*:*:*:* versions from (including) 10.1.0 up to (excluding) 10.1.5 *cpe:2.3:a:akka:http_server:*:*:*:*:*:*:*:* versions from (including) 10.2.0 up to (excluding) 10.2.7 OR *cpe:2.3:a:akka:http_server:*:*:*:*:*:*:*:* versions from (including) 10.1.0 up to (excluding) 10.1.15 *cpe:2.3:a:akka:http_server:*:*:*:*:*:*:*:* versions from (including) 10.2.0 up to (excluding) 10.2.7 -
Modified Analysis by [email protected]
Jun. 03, 2022
Action Type Old Value New Value Changed Reference Type http://packetstormsecurity.com/files/167018/Akka-HTTP-10.1.14-Denial-Of-Service.html No Types Assigned http://packetstormsecurity.com/files/167018/Akka-HTTP-10.1.14-Denial-Of-Service.html Exploit, Third Party Advisory Changed Reference Type https://akka.io/blog/news/2021/11/22/akka-http-10.1.15-released No Types Assigned https://akka.io/blog/news/2021/11/22/akka-http-10.1.15-released Release Notes, Vendor Advisory Changed CPE Configuration OR *cpe:2.3:a:akka:http_server:*:*:*:*:*:*:*:* versions from (including) 10.1.0 up to (excluding) 10.2.7 OR *cpe:2.3:a:akka:http_server:*:*:*:*:*:*:*:* versions from (including) 10.1.0 up to (excluding) 10.1.5 *cpe:2.3:a:akka:http_server:*:*:*:*:*:*:*:* versions from (including) 10.2.0 up to (excluding) 10.2.7 -
CVE Modified by [email protected]
May. 11, 2022
Action Type Old Value New Value Added Reference http://packetstormsecurity.com/files/167018/Akka-HTTP-10.1.14-Denial-Of-Service.html [No Types Assigned] -
CWE Remap by [email protected]
May. 03, 2022
Action Type Old Value New Value Changed CWE CWE-787 CWE-674 -
CVE Modified by [email protected]
Apr. 15, 2022
Action Type Old Value New Value Changed Description Akka HTTP 10.1.x 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. 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. Added Reference https://akka.io/blog/news/2021/11/22/akka-http-10.1.15-released [No Types Assigned] -
Initial Analysis by [email protected]
Nov. 04, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://akka.io/blog/ No Types Assigned https://akka.io/blog/ Vendor Advisory Changed Reference Type https://akka.io/blog/news/2021/11/02/akka-http-10.2.7-released No Types Assigned https://akka.io/blog/news/2021/11/02/akka-http-10.2.7-released Release Notes, Vendor Advisory Changed Reference Type https://doc.akka.io/docs/akka-http/current/security/2021-CVE-2021-42697-stack-overflow-parsing-user-agent.html No Types Assigned https://doc.akka.io/docs/akka-http/current/security/2021-CVE-2021-42697-stack-overflow-parsing-user-agent.html Vendor Advisory Added CWE NIST CWE-787 Added CPE Configuration OR *cpe:2.3:a:akka:http_server:*:*:*:*:*:*:*:* versions from (including) 10.1.0 up to (excluding) 10.2.7
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-42697 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-42697
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
26.02 }} 16.99%
score
0.96722
percentile