lettre has TLS hostname verification disabled when using Boring TLS backend
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| lettre | lettre | affected |
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| Lettre | Lettre |
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Github GHSA |
GHSA-4pj9-g833-qx53 | lettre has TLS hostname verification disabled when using Boring TLS backend |
No CVSS v3.1
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.319% probability within 30 days)
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| Metrics |
ssvc
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| First Time appeared |
Lettre
Lettre lettre |
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| Vendors & Products |
Lettre
Lettre lettre |
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| Description | lettre is a a mailer library for Rust. Starting in version 0.10.1 and prior to version 0.11.22, an inverted-boolean bug in lettre's `boring-tls` integration silently disables TLS hostname verification for callers using the default (strict) configuration. An on-path attacker presenting any chain-valid certificate for any domain can intercept SMTP submission, including PLAIN/LOGIN credentials and message contents, against any lettre user built with the `boring-tls` feature. Other TLS backends (`native-tls`, `rustls`) are unaffected. Version 0.11.22 patches the issue. | |
| Title | lettre has TLS hostname verification disabled when using Boring TLS backend | |
| Weaknesses | CWE-295 | |
| References |
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| Metrics |
cvssV4_0
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