CVE-2021-43797
What it is
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.
At a glance
- Exploitability
- Can be exploited over the network without logging in, but needs a user to act. High risk of data tampering.
- Exploit odds
- 2.9% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 2.9% in the next 30 days (EPSS).
- Severity: 6.5 MEDIUM (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 2.9% · EPSS, next 30 days
- Weakness
- CWE-444
- Record status
- Modified
Affected
- Netty < 4.1.71
- Quarkus < 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
Attack profile CVSS 3.1 · 6.5
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
Raw vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2021-43797.md and follow it. Check whether this project is affected by CVE-2021-43797. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/netty/netty/commit/07aa6b5938a8b6ed7a6586e066400e2643897323
- https://github.com/netty/netty/security/advisories/GHSA-wx5j-54mm-rqqq
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://github.com/netty/netty/commit/07aa6b5938a8b6ed7a6586e066400e2643897323
- https://github.com/netty/netty/security/advisories/GHSA-wx5j-54mm-rqqq
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujul2022.html
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
- https://www.oracle.com/security-alerts/cpujul2022.html
- 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
- https://www.oracle.com/security-alerts/cpujul2022.html