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29 lines
1.1 KiB
Markdown
29 lines
1.1 KiB
Markdown
```toml
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[advisory]
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id = "RUSTSEC-2022-0065"
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package = "openssl-src"
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aliases = ["CVE-2022-3786", "GHSA-h8jm-2x53-xhp5"]
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categories = ["denial-of-service"]
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date = "2022-11-01"
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url = "https://www.openssl.org/news/secadv/20221101.txt"
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[versions]
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patched = [">= 300.0.11"]
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unaffected = ["< 300.0.0"]
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```
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# X.509 Email Address Variable Length Buffer Overflow
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A buffer overrun can be triggered in X.509 certificate verification,
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specifically in name constraint checking. Note that this occurs after
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certificate chain signature verification and requires either a CA to
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have signed a malicious certificate or for an application to continue
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certificate verification despite failure to construct a path to a trusted
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issuer. An attacker can craft a malicious email address in a certificate
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to overflow an arbitrary number of bytes containing the `.` character
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(decimal 46) on the stack. This buffer overflow could result in a crash
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(causing a denial of service).
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In a TLS client, this can be triggered by connecting to a malicious
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server. In a TLS server, this can be triggered if the server requests
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client authentication and a malicious client connects.
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