netty-incubator-codec-ohttp's BoringSSLAEADContext Repeats Nonces

published 2024-06-04 2 y ago modified 2026-09-10 1 mo ago also GHSA-g762-h86w-8749 , EUVD-2024-2051

cvss: 5.9; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 19%
public exploits: 0; none known

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.

Patch / fix

fixed in 2

maven io.netty.incubator:netty-incubator-codec-ohttp 0.0.11.Final
netty netty-incubator-codec-ohttp 0.0.11

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-08-06)

Exploit prediction

0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/netty/netty-incubator-codec-ohttp/security/advisories/GHSA-g762-h86w-8749 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N
NVD	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
GitHub	3.1	5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N

Affected packages

ecosystem	package	affected	fixed in
maven	io.netty.incubator:netty-incubator-codec-ohttp	>=0.0.3.Final, <0.0.11.Final	0.0.11.Final

Affected products

netty netty-incubator-codec-ohttp

Classification

Weakness

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-190 Integer Overflow or Wraparound
CWE-323 Reusing a Nonce, Key Pair in Encryption

References

github.com /netty/netty-incubator-codec-ohttp/security/advisories/GHSA-g762-h86w-8749
web, exploit, vendor-advisory
github.com /netty/netty-incubator-codec-ohttp/blob/1ddadb6473cd3be5491d114431ed4c1a9f316001/codec-ohttp-hpke-classes-bori
web, product
nvd.nist.gov /vuln/detail/CVE-2024-36121
advisory
github.com /netty/netty-incubator-codec-ohttp
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary