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FreeBSD: VID-0844671C-5A09-11ED-856E-D4C9EF517024 (CVE-2022-3786): OpenSSL -- Buffer overflows in Email verification

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FreeBSD: VID-0844671C-5A09-11ED-856E-D4C9EF517024 (CVE-2022-3786): OpenSSL -- Buffer overflows in Email verification

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
11/01/2022
Created
11/08/2022
Added
11/04/2022
Modified
11/04/2022

Description

A buffer overrun can be triggered in X.509 certificate verification, specifically in name constraint checking. Note that this occurs after certificate chain signature verification and requires either a CA to have signed a malicious certificate or for an application to continue certificate verification despite failure to construct a path to a trusted issuer. An attacker can craft a malicious email address in a certificate to overflow an arbitrary number of bytes containing the `.' character (decimal 46) on the stack. This buffer overflow could result in a crash (causing a denial of service). In a TLS client, this can be triggered by connecting to a malicious server. In a TLS server, this can be triggered if the server requests client authentication and a malicious client connects. Fixed in OpenSSL 3.0.7 (Affected 3.0.0,3.0.1,3.0.2,3.0.3,3.0.4,3.0.5,3.0.6).

Solution(s)

  • freebsd-upgrade-package-openssl-devel

References

  • CVE-2022-3786
  • USN-5710-1

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