PT-2021-23660 · Lightbend · Akka Http

Simone Quatrini · Published 2021-11-02 · Updated 2022-06-13 · CVE-2021-42697

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Akka HTTP versions 10.1.x through 10.1.14 Akka HTTP versions 10.2.x through 10.2.6

Description The issue allows a remote attacker to conduct a Denial of Service attack by sending a User-Agent header with deeply nested comments, causing stack exhaustion while parsing HTTP headers.

Recommendations For Akka HTTP versions 10.1.x through 10.1.14, update to version 10.1.15 or later. For Akka HTTP versions 10.2.x through 10.2.6, update to version 10.2.7 or later.

Exploit

Fix

Uncontrolled Recursion

Memory Corruption

Weakness Enumeration

CWE-674

CWE-787

Related Identifiers

CVE-2021-42697

GHSA-3HW2-H67C-WQ66

Affected Products

Akka Http

References · 14

• 🔥 https://exploit-db.com/exploits/50892 · Exploit
• 🔥 http://packetstormsecurity.com/files/167018/Akka-HTTP-10.1.14-Denial-Of-Service.html · Exploit
• https://akka.io/blog · Vendor Advisory
• https://akka.io/blog/news/2021/11/02/akka-http-10.2.7-released · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-3hw2-h67c-wq66 · Vendor Advisory
• https://akka.io/blog/news/2021/11/22/akka-http-10.1.15-released · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-42697 · Security Note
• https://doc.akka.io/docs/akka-http/current/security/2021-CVE-2021-42697-stack-overflow-parsing-user-agent.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-42697 · Vendor Advisory
• https://github.com/akka/akka-http/pull/3924 · Note
• https://github.com/akka/akka-http · Note
• https://t.me/cvenotify/29061 · Telegram Post
• https://t.me/cibsecurity/31672 · Telegram Post
• https://t.me/cvenotify/22904 · Telegram Post