CVE-2022-4203

A read 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. The read buffer overrun might result in a crash which could lead to a denial of service attack. In theory it could also result in the disclosure of private memory contents (such as private keys, or sensitive plaintext) although we are not aware of any working exploit leading to memory contents disclosure as of the time of release of this advisory. 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.

CVSS v3.0 4.9 MEDIUM

4.9^/10

CVSS v3.0 : MEDIUM

Vector :

Exploitability : 1.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://www.openssl.org/news/secadv/20230207.txt	Vendor Advisory
https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=c927a3492698c254637da836762f9b1f86cffabc	Mailing List Patch

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Configurations

Configuration 1 (hide)

cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*

Information

Published : 2023-02-24 07:15

Updated : 2023-03-09 12:03

NVD link : CVE-2022-4203

Mitre link : CVE-2022-4203

JSON object : View

CWE

CWE-125

Out-of-bounds Read

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Products Affected

openssl

openssl

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