https://bugzilla.suse.com/show_bug.cgi?id=1215786 Bug ID: 1215786 Summary: VUL-0: CVE-2023-42116: exim: SMTP Challenge Stack-based Buffer Overflow Remote Code Execution Vulnerability Classification: openSUSE Product: openSUSE Distribution Version: Leap 15.6 Hardware: Other URL: https://smash.suse.de/issue/380211/ OS: Other Status: NEW Severity: Major Priority: P5 - None Component: Security Assignee: wullinger@rz.uni-kiel.de Reporter: smash_bz@suse.de QA Contact: security-team@suse.de CC: abergmann@suse.com Target Milestone: --- Found By: Security Response Team Blocker: --- This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of NTLM challenge requests. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the service account. 06/06/22 – ZDI requested a PSIRT contact. 06/14/22 – ZDI reported the vulnerability to the vendor. 04/25/23 – ZDI asked for an update. 04/25/23 – The vendor asked us to re-send the reports. 05/10/23 – ZDI sent the vulnerability to the vendor. 09/25/23 – ZDI asked for an update and informed the vendor that we intend to publish the case as a zero-day advisory on 09/27/23. -- Mitigation: Given the nature of the vulnerability, the only salient mitigation strategy is to restrict interaction with the application. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-42116 -- You are receiving this mail because: You are on the CC list for the bug.