CVE-2023-42118: (0Day) Exim libspf2 Integer Underflow Remote Code Execution Vulnerability
Exim libspf2 Integer Underflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Exim libspf2. Authentication is not required to exploit this vulnerability.
The specific flaw exists within the parsing of SPF macros. When parsing SPF macros, the process does not properly validate user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the service account. . Was ZDI-CAN-17578.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2023-42118?
CVE-2023-42118 is classified as a high severity vulnerability that allows remote code execution.
How do I fix CVE-2023-42118?
To address CVE-2023-42118, you should update Exim libspf2 to the latest patched version as recommended by the vendor.
Who is affected by CVE-2023-42118?
CVE-2023-42118 affects all installations of Exim libspf2 that are vulnerable to the integer underflow flaw.
What type of attack can exploit CVE-2023-42118?
CVE-2023-42118 can be exploited by network-adjacent attackers to execute arbitrary code without requiring authentication.
When was CVE-2023-42118 disclosed?
CVE-2023-42118 was disclosed publicly in 2023, detailing its impact on Exim libspf2 installations.