CVE-2023-42119
Description
An out-of-bounds read flaw was found in Exim which exists within the smtp service. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer, leading to disclosure of some sensitive information. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the service account.
Statement
The vulnerable package Exim is not shipped in any Red Hat products.
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Memory
An attacker could get secret values such as cryptographic keys, PII, memory addresses, or other information that could be used in additional attacks.
Confidentiality
Technical Impact: Bypass Protection Mechanism
Out-of-bounds memory could contain memory addresses or other information that can be used to bypass ASLR and other protection mechanisms in order to improve the reliability of exploiting a separate weakness for code execution.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
An attacker could cause a segmentation fault or crash by causing memory to be read outside of the bounds of the buffer. This is especially likely when the code reads a variable amount of data and assumes that a sentinel exists to stop the read operation, such as a NUL in a string.
Other
Technical Impact: Varies by Context
The read operation could produce other undefined or unexpected results.
Frequently Asked Questions
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