TLS peer impersonation via permissive wildcard matching
Published May 7, 2025 · Updated May 28, 2025
Improper certificate validation in syslog-ng before 4.8.2 allows man-in-the-middle attackers to impersonate trusted TLS peers. The tls_wildcard_match() helper splits certificate names into labels and passes each label to g_pattern_match_simple(), accepting partial or nonleading wildcards. Exploitation requires knowledge of intended certificate names, an inferred configured wildcard, and a position to interpose on TLS traffic; it enables peer impersonation rather than host privilege gain.
Summary
What happened
Improper certificate validation in syslog-ng before 4.8.2 allows man-in-the-middle attackers to impersonate trusted TLS peers. The tls_wildcard_match() helper splits certificate names into labels and passes each label to g_pattern_match_simple(), accepting partial or nonleading wildcards. Exploitation requires knowledge of intended certificate names, an inferred configured wildcard, and a position to interpose on TLS traffic; it enables peer impersonation rather than host privilege gain.
The record
- CVE
- CVE-2024-47619
- Published
- May 7, 2025
- Updated
- May 28, 2025
- Vendor
- syslog-ng
- Product
- syslog-ng
- Classifications
- CWE-295, T1557
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 7, 2025CVE publishedPublication date reported by the CVE source.
- May 28, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=< 4.8.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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