ZDI-23-1472: (0Day) Exim libspf2 Integer Underflow Remote Code Execution Vulnerability
First published: Wed Sep 27 2023(Updated: )
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.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Exim libspf2 |
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Reference Links
- collector/zdi-published
- alias/ZDI-CAN-17578
- agent/type
- agent/last-modified-date
- agent/first-publish-date
- agent/references
- agent/severity
- agent/title
- agent/description
- collector/zdi-advisory
- source/ZDI
- alias/ZDI-23-1472
- alias/CVE-2023-42118
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- agent/softwarecombine
- agent/tags
- agent/event
- agent/trending
- vendor/exim
- canonical/exim libspf2