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How the CVE Works
The vulnerability occurs in the `openssl` crate (Rust) before version 0.10.55. When an empty string is passed to X509VerifyParamRef::set_host, the function fails to properly validate input boundaries, leading to an out-of-bounds read. This allows an attacker to trigger memory access beyond the intended buffer, potentially leaking sensitive data or causing a crash. The flaw stems from insufficient input sanitization in the hostname verification logic.
DailyCVE Form
Platform: OpenSSL (Rust)
Version: <0.10.55
Vulnerability: Buffer over-read
Severity: Moderate
Date: Jul 28, 2025
Prediction: Patch expected by Aug 10, 2025
What Undercode Say
Check installed version cargo tree | grep openssl Mitigation command cargo update openssl --precise 0.10.55
How Exploit
Craft a malicious certificate with an empty hostname field to trigger the buffer over-read during verification.
Protection from this CVE
Update to `openssl` 0.10.55+.
Impact
Information disclosure or denial-of-service.
Sources:
Reported By: github.com
Extra Source Hub:
Undercode
