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CVE-2021-21409

MEDIUMCVSS 5.9/10EPSS 4.93%

Last modified

CVE-2021-21409 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. Netty is an open-source, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. In Netty (io.netty:netty-codec-http2) before version 4.1.61.Final there is a vulnerability that enables request smuggling. EPSS estimates a 4.93% chance of exploitation in the next 30 days.

Description

Netty is an open-source, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. In Netty (io.netty:netty-codec-http2) before version 4.1.61.Final there is a vulnerability that enables request smuggling. The content-length header is not correctly validated if the request only uses a single Http2HeaderFrame with the endStream set to to true. This could lead to request smuggling if the request is proxied to a remote peer and translated to HTTP/1.1. This is a followup of GHSA-wm47-8v5p-wjpj/CVE-2021-21295 which did miss to fix this one case. This was fixed as part of 4.1.61.Final.

Metrics

CVSS 3.1
5.9/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Probability
4.93%

91.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
NettyNetty< 4.1.61
DebianDebian Linux10.0
NetappOncommand Api ServicesAll versions
NetappOncommand Workflow AutomationAll versions
OracleBanking Corporate Lending Process Management14.2.0
OracleBanking Corporate Lending Process Management14.3.0
OracleBanking Corporate Lending Process Management14.5.0
OracleBanking Credit Facilities Process Management14.2.0
OracleBanking Credit Facilities Process Management14.3.0
OracleBanking Credit Facilities Process Management14.5.0
OracleBanking Trade Finance Process Management14.2.0
OracleBanking Trade Finance Process Management14.3.0
OracleBanking Trade Finance Process Management14.5.0
OracleCoherence12.2.1.4.0
OracleCoherence14.1.1.0.0
OracleCommunications Brm - Elastic Charging Engine12.0.0.3
OracleCommunications Cloud Native Core Console1.7.0
OracleCommunications Cloud Native Core Policy1.14.0
OracleCommunications Design Studio7.4.2.0.0
OracleCommunications Messaging Server8.1
OracleHelidon1.4.10
OracleHelidon2.4.0
OracleJd Edwards Enterpriseone Tools< 9.2.6.3
OracleNosql Database< 21.1.12
OraclePrimavera Gateway>= 17.12.0, <= 17.12.11
OraclePrimavera Gateway>= 18.8.0, <= 18.8.11
OraclePrimavera Gateway>= 19.12.0, <= 19.12.10
QuarkusQuarkus<= 1.13.7

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-21409?
Netty is an open-source, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. In Netty (io.netty:netty-codec-http2) before version 4.1.61.Final there is a vulnerability that enables request smuggling. The content-length header is not correctly validated if the request only uses a single Http2HeaderFrame with the endStream set to to true. This could lead to request smuggling if the request is proxied to a remote peer and translated to HTTP/1.1. This is a followup of GHSA-wm47-8v5p-wjpj/CVE-2021-21295 which did miss to fix this one case. This was fixed as part of 4.1.61.Final.
How severe is CVE-2021-21409?
CVE-2021-21409 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 4.93% probability of exploitation in the next 30 days.
How do I fix CVE-2021-21409?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21409?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST