Credential disclosure via authentication-helper buffer over-read
Published Dec 25, 2022 · Updated Apr 14, 2025
A buffer over-read in Squid 2.5 through 5.6 allows remote attackers to disclose credentials or crash the proxy through NTLM authentication. The libntlmauth-based SSPI and SMB helpers apply incorrect integer-overflow protection while processing attacker-controlled authentication data, allowing reads beyond intended memory. Exposure requires NTLM or Negotiate authentication with a vulnerable helper and can return decrypted credentials or arbitrary process memory to the client.
Summary
What happened
A buffer over-read in Squid 2.5 through 5.6 allows remote attackers to disclose credentials or crash the proxy through NTLM authentication. The libntlmauth-based SSPI and SMB helpers apply incorrect integer-overflow protection while processing attacker-controlled authentication data, allowing reads beyond intended memory. Exposure requires NTLM or Negotiate authentication with a vulnerable helper and can return decrypted credentials or arbitrary process memory to the client.
The record
- CVE
- CVE-2022-41318
- Published
- Dec 25, 2022
- Updated
- Apr 14, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-190, T1003, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 25, 2022CVE publishedPublication date reported by the CVE source.
- Apr 14, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
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Attacks
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Weakness, pattern, technique
Public exploit references
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Technologies
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Your stack
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