PT-2019-5206 · Apache+1 · Netty+1
Miguel Costa
·
Published
2019-09-26
·
Updated
2025-07-07
·
CVE-2019-16869
CVSS v2.0
7.8
High
| Vector | AV:N/AC:L/Au:N/C:N/I:C/A:N |
Name of the Vulnerable Software and Affected Versions
Netty versions prior to 4.1.42.Final
Description
The issue is related to the incorrect handling of whitespace before the colon in HTTP headers, such as a "Transfer-Encoding : chunked" line. This can lead to HTTP request smuggling, allowing a remote attacker to impact data integrity.
Recommendations
For versions prior to 4.1.42.Final, update to version 4.1.42.Final or later to resolve the issue. As a temporary workaround, consider restricting access to the vulnerable HTTP header handling functionality until a patch is available. Avoid using whitespace before the colon in HTTP headers, such as
Transfer-Encoding : chunked, in the affected API endpoints until the issue is resolved.Exploit
Fix
HTTP Request/Response Smuggling
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Weakness Enumeration
Related Identifiers
Affected Products
Netty
Ubuntu