Use-after-free in Exim - CVE-2022-3559

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Main Vulnerability Database Vulnerabilities #VU69579

Use-after-free in Exim - CVE-2022-3559

Published: November 24, 2022


Vulnerability identifier: #VU69579
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2022-3559
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Exim
Affected software:
Exim

Detailed vulnerability description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a use-after-free error in the regex handler. A remote attacker can send specially crafted data to the mail server, trigger a use-after-free error and perform a denial of service (DoS) attack.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.


How to mitigate CVE-2022-3559

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Sources