Memory corruption via oversized authentication parameters
Published Aug 7, 2023 · Updated Oct 17, 2024
Buffer overflows in check_auth on three NETGEAR appliances allow remote authenticated users to corrupt memory via oversized credentials. The function copies attacker-controlled http_passwd and http_username NVRAM values without adequate bounds checks, so long strings overflow its buffers. An authenticated management session is required, and the public report does not establish whether exploitation causes a crash or controlled code execution.
Summary
What happened
Buffer overflows in check_auth on three NETGEAR appliances allow remote authenticated users to corrupt memory via oversized credentials. The function copies attacker-controlled http_passwd and http_username NVRAM values without adequate bounds checks, so long strings overflow its buffers. An authenticated management session is required, and the public report does not establish whether exploitation causes a crash or controlled code execution.
The record
- CVE
- CVE-2023-39550
- Published
- Aug 7, 2023
- Updated
- Oct 17, 2024
- Vendor
- NETGEAR
- Product
- XWN5001
- Classifications
- CWE-120
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 7, 2023CVE publishedPublication date reported by the CVE source.
- Oct 17, 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=v0.4.1.1
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
- FirmRec Netgear authentication-function 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