SB2021120923 - HTTP request smuggling in Netty

Description

This security bulletin contains information about 1 security vulnerability.

1) Inconsistent interpretation of HTTP requests (CVE-ID: CVE-2021-43797)

The vulnerability allows a remote attacker to preform HTTP request smuggling attacks.

The vulnerability exists due to improper validation of HTTP requests when processing control chars present at the beginning / end of the header name. A remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.

Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.

Remediation

Install update from vendor's website.

References

• https://github.com/netty/netty/security/advisories/GHSA-wx5j-54mm-rqqq
• https://github.com/netty/netty/commit/07aa6b5938a8b6ed7a6586e066400e2643897323
• https://security.netapp.com/advisory/ntap-20220107-0003/