What’s Vulnerable › Vulnerabilities

CVE-2024-36121: netty-incubator-codec-ohttp's BoringSSLAEADContext Repeats Nonces

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-06-04 · updated 2026-06-17
• Weakness: CWE-190

Description

netty-incubator-codec-ohttp is the OHTTP implementation for netty. BoringSSLAEADContext keeps track of how many OHTTP responses have been sent and uses this sequence number to calculate the appropriate nonce to use with the encryption algorithm. Unfortunately, two separate errors combine which would allow an attacker to cause the sequence number to overflow and thus the nonce to repeat.

Affected products

• netty-incubator-codec-ohttp: from 0.0.3 before 0.0.11 — fixed in 0.0.11

How to fix

Upgrade to a fixed version: netty-incubator-codec-ohttp 0.0.11. Check the vendor advisory for mitigations.

References

• https://github.com/netty/netty-incubator-codec-ohttp/blob/1ddadb6473cd3be5491d114431ed4c1a9f316001/codec-ohttp-hpke-classes-boringssl/src/main/java/io/netty/incubator/codec/hpke/boringssl/BoringSSLAEADContext.java#L112-L114
• https://github.com/netty/netty-incubator-codec-ohttp/security/advisories/GHSA-g762-h86w-8749
• https://github.com/netty/netty-incubator-codec-ohttp/blob/1ddadb6473cd3be5491d114431ed4c1a9f316001/codec-ohttp-hpke-classes-boringssl/src/main/java/io/netty/incubator/codec/hpke/boringssl/BoringSSLAEADContext.java#L112-L114
• https://github.com/netty/netty-incubator-codec-ohttp/security/advisories/GHSA-g762-h86w-8749

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