CVE-2021-43797

EUVD-2021-2607

09.12.2021, 19:15

Netty is an asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. Netty prior to version 4.1.71.Final skips control chars when they are present at the beginning / end of the header name. It should instead fail fast as these are not allowed by the spec and could lead to HTTP request smuggling. Failing to do the validation might cause netty to "sanitize" header names before it forward these to another remote system when used as proxy. This remote system can't see the invalid usage anymore, and therefore does not do the validation itself. Users should upgrade to version 4.1.71.Final.

HTTP Request/Response Smuggling

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	6.5 MEDIUM	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
GitHub_M	CNA	6.5 MEDIUM	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Base Score

CVSS 3.x

EPSS Score

Percentile: 59%

Affected Products (NVD)

Vendor	Product	Version
netty	netty	𝑥 < 4.1.71
quarkus	quarkus	𝑥 < 2.5.3
netapp	oncommand_workflow_automation	-
netapp	snapcenter	-
oracle	banking_deposits_and_lines_of_credit_servicing	2.7
oracle	banking_party_management	2.7.0
oracle	banking_platform	2.6.2
oracle	coherence	12.2.1.4.0
oracle	coherence	14.1.1.0.0
oracle	communications_cloud_native_core_binding_support_function	1.11.0
oracle	communications_cloud_native_core_network_slice_selection_function	1.8.0
oracle	communications_cloud_native_core_policy	1.15.0
oracle	communications_cloud_native_core_security_edge_protection_proxy	1.7.0
oracle	communications_cloud_native_core_unified_data_repository	1.15.0
oracle	communications_design_studio	7.4.2
oracle	communications_instant_messaging_server	8.1
oracle	helidon	1.4.10
oracle	helidon	2.4.0
oracle	peoplesoft_enterprise_peopletools	8.58
oracle	peoplesoft_enterprise_peopletools	8.59
debian	debian_linux	10.0
debian	debian_linux	11.0

𝑥

= Vulnerable software versions

Debian Releases

Debian Product

Codename

netty

bookworm	1:4.1.48-7+deb12u1 fixed
bookworm (security)	1:4.1.48-7+deb12u1 fixed
bullseye	1:4.1.48-4+deb11u2 fixed
bullseye (security)	1:4.1.48-4+deb11u2 fixed
sid	1:4.1.48-10 fixed
stretch	no-dsa
trixie	1:4.1.48-10 fixed

Ubuntu Releases

Ubuntu Product

Codename

netty

bionic	Fixed 1:4.1.7-4ubuntu0.1+esm2 released
focal	Fixed 1:4.1.45-1ubuntu0.1~esm1 released
hirsute	ignored
impish	ignored
jammy	Fixed 1:4.1.48-4+deb11u1build0.22.04.1 released
kinetic	Fixed 1:4.1.48-5ubuntu0.1 released
lunar	ignored
mantic	ignored
noble	needed
trusty	needs-triage
xenial	Fixed 1:4.0.34-1ubuntu0.1~esm1 released

Common Weakness Enumeration

CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
The product acts as an intermediary HTTP agent (such as a proxy or firewall) in the data flow between two entities such as a client and server, but it does not interpret malformed HTTP requests or responses in ways that are consistent with how the messages will be processed by those entities that are at the ultimate destination.

References

https://github.com/netty/netty/commit/07aa6b5938a8b6ed7a6586e066400e2643897323

https://github.com/netty/netty/security/advisories/GHSA-wx5j-54mm-rqqq

https://lists.debian.org/debian-lts-announce/2023/01/msg00008.html

https://security.netapp.com/advisory/ntap-20220107-0003/

https://www.debian.org/security/2023/dsa-5316

https://www.oracle.com/security-alerts/cpuapr2022.html