AnyIO: TLSStream IDNA 2003 host name encoding enables potential TLS certificate spoofing
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| agronholm | anyio | affected |
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| Agronholm | Anyio |
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Github GHSA |
GHSA-82r6-8w77-94w6 | AnyIO: TLSStream IDNA 2003 host name encoding enables potential TLS certificate spoofing |
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.289% probability within 30 days)
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threat_severity
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cvssV3_1
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ssvc
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Agronholm
Agronholm anyio |
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Agronholm
Agronholm anyio |
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| Description | AnyIO is a high level asynchronous concurrency and networking framework that works on top of either Trio or asyncio. Prior to 4.14.2, connect_tcp() and TLSStream.wrap() can validate internationalized host names after the standard library converts them with IDNA 2003 instead of IDNA 2008. When a connection to a non-ASCII domain is hijacked or redirected, an attacker can obtain a legitimate certificate for the different ASCII hostname produced by IDNA 2003 and present it to the client, causing the malicious endpoint's certificate to validate. This issue is fixed in version 4.14.2. | |
| Title | AnyIO: TLSStream IDNA 2003 host name encoding enables potential TLS certificate spoofing | |
| Weaknesses | CWE-295 CWE-297 |
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cvssV4_0
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