Heap disclosure via undersized AES key
Published Jan 10, 2023 · Updated Aug 3, 2024
An out-of-bounds read in ASUS RT-AX82U 3.0.0.4.386_49674-ge182230 allows remote attackers to disclose heap data via crafted packets. The pre-authentication cm_processREQ_NC handler accepts an AES-256 master key shorter than 32 bytes, then OpenSSL reads beyond its heap allocation while constructing the response-encryption key. Reachability requires network access to the AiMesh configuration service; known plaintext in the encrypted reply provides an oracle for recovering adjacent heap bytes, including stack addresses.
Summary
What happened
An out-of-bounds read in ASUS RT-AX82U 3.0.0.4.386_49674-ge182230 allows remote attackers to disclose heap data via crafted packets. The pre-authentication cm_processREQ_NC handler accepts an AES-256 master key shorter than 32 bytes, then OpenSSL reads beyond its heap allocation while constructing the response-encryption key. Reachability requires network access to the AiMesh configuration service; known plaintext in the encrypted reply provides an oracle for recovering adjacent heap bytes, including stack addresses.
The record
- CVE
- CVE-2022-38105
- Published
- Jan 10, 2023
- Updated
- Aug 3, 2024
- Vendor
- ASUSTeK Computer Inc.
- Product
- ASUS RT-AX82U Firmware
- Classifications
- CWE-119
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 10, 2023CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=3.0.0.4.386_49674-ge182230
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- Cisco Talos cm_processREQ_NC information-leak proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo