Source-address spoofing via unconditional PROXY protocol parsing
Published May 14, 2024 · Updated Aug 2, 2024
Source-address spoofing in tg123 sshpiper 1.0.50 through 1.2.x allows remote attackers to forge addresses recorded for connections. The sshpiperd listener unconditionally wraps its socket in a PROXY protocol parser, trusting client-supplied source addresses without an enablement flag or trusted-proxy allowlist. Unauthenticated network access to the listener is sufficient to write false addresses into IP-based logs, weakening whitelisting, rate limiting, and investigations.
Summary
What happened
Source-address spoofing in tg123 sshpiper 1.0.50 through 1.2.x allows remote attackers to forge addresses recorded for connections. The sshpiperd listener unconditionally wraps its socket in a PROXY protocol parser, trusting client-supplied source addresses without an enablement flag or trusted-proxy allowlist. Unauthenticated network access to the listener is sufficient to write false addresses into IP-based logs, weakening whitelisting, rate limiting, and investigations.
The record
- CVE
- CVE-2024-35175
- Published
- May 14, 2024
- Updated
- Aug 2, 2024
- Vendor
- tg123
- Product
- sshpiper
- Classifications
- CWE-345, T1036
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 14, 2024CVE publishedPublication date reported by the CVE source.
- Aug 2, 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=>= 1.0.50, < 1.3.0
- Affected versionversion=1.0.5 <1.3.0
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.
Public exploit references
- HAProxy PROXY-header source-spoofing proof of conceptproof of concept · demonstrated
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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