CVE-2022-38493Network attack vector

Service interruption via unchecked RSA-OAEP key length

Published Aug 20, 2022 · Updated Aug 3, 2024

Denial of service in Rhonabwy 0.9.99 through 1.1.x before 1.1.7 allows remote attackers to interrupt applications via crafted JWE tokens. The RSA-OAEP SHA-1 and SHA-256 decryptors in src/jwe.c pass ciphertext to rsa_compute_root without rejecting values larger than the private key or keys too short for OAEP. Exposure requires an application to process attacker-controlled JWE tokens through the affected decryption path, and the documented consequence is limited to service availability.

CVSS severity7.5
High
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Rhonabwy 0.9.99 through 1.1.x before 1.1.7 allows remote attackers to interrupt applications via crafted JWE tokens. The RSA-OAEP SHA-1 and SHA-256 decryptors in src/jwe.c pass ciphertext to rsa_compute_root without rejecting values larger than the private key or keys too short for OAEP. Exposure requires an application to process attacker-controlled JWE tokens through the affected decryption path, and the documented consequence is limited to service availability.

The record

CVE
CVE-2022-38493
Published
Aug 20, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-327, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 20, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-327Use of a Broken or Risky Cryptographic Algorithm
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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