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Buffer Overflow Affecting openssl package, versions <3.0.7-1

0.0
high

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    Exploit Maturity Proof of concept
    EPSS 6.08% (94th percentile)
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NVD
7.5 high
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SUSE
8.1 high
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Red Hat
7.5 high

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  • Snyk ID SNYK-DEBIANUNSTABLE-OPENSSL-3092614
  • published 1 Nov 2022
  • disclosed 1 Nov 2022
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Introduced: 1 Nov 2022

CVE-2022-3602 Open this link in a new tab
CWE-120 Open this link in a new tab

How to fix?

Upgrade Debian:unstable openssl to version 3.0.7-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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 the malicious certificate or for the application to continue certificate verification despite failure to construct a path to a trusted issuer. An attacker can craft a malicious email address to overflow four attacker-controlled bytes on the stack. This buffer overflow could result in a crash (causing a denial of service) or potentially remote code execution.

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.

Note: Pre-announcements of CVE-2022-3602 described this issue as CRITICAL. Further analysis based on some of the mitigating factors described above have led this to be downgraded to HIGH. Users are still encouraged to upgrade to a new version as soon as possible.

References