Endpoint impersonation via negative return-value coercion
Published Feb 27, 2020 · Updated Aug 4, 2024
Improper certificate validation in lua-openssl 0.7.7-1 allows man-in-the-middle attackers to impersonate remote endpoints. The openssl_x509_check_ip_asc binding passes negative X509_check_ip_asc error returns to lua_pushboolean, which converts them to true instead of rejecting the certificate. Exposure requires a client application to rely on check_ip_asc while an attacker can intercept the connection and present a certificate that triggers an error return.
Summary
What happened
Improper certificate validation in lua-openssl 0.7.7-1 allows man-in-the-middle attackers to impersonate remote endpoints. The openssl_x509_check_ip_asc binding passes negative X509_check_ip_asc error returns to lua_pushboolean, which converts them to true instead of rejecting the certificate. Exposure requires a client application to rely on check_ip_asc while an attacker can intercept the connection and present a certificate that triggers an error return.
The record
- CVE
- CVE-2020-9434
- Published
- Feb 27, 2020
- Updated
- Aug 4, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-295, T1557
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 27, 2020CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
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What is affected?
Affected products and versions are unavailable in this record.
Attacks
What attackers are doing with it
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Technologies
Your stack
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Your stack
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