Bugzilla – Bug 1215786
VUL-0: CVE-2023-42116: exim: SMTP Challenge Stack-based Buffer Overflow Remote Code Execution Vulnerability
Last modified: 2024-07-15 17:05:25 UTC
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
This is an autogenerated message for OBS integration: This bug (1215786) was mentioned in https://build.opensuse.org/request/show/1114823 Backports:SLE-12-SP4+Backports:SLE-15-SP4+Backports:SLE-15-SP5 / exim https://build.opensuse.org/request/show/1114826 Factory / exim
fixed in exim 4.96.1, Backports exim 4.94 has a patch.
openSUSE-SU-2023:0293-1: An update that fixes three vulnerabilities is now available. Category: security (critical) Bug References: 1215784,1215785,1215786 CVE References: CVE-2023-42114,CVE-2023-42115,CVE-2023-42116 JIRA References: Sources used: openSUSE Backports SLE-15-SP5 (src): exim-4.94.2-bp155.5.3.1 openSUSE Backports SLE-15-SP4 (src): exim-4.94.2-bp154.2.6.1
This is an autogenerated message for OBS integration: This bug (1215786) was mentioned in https://build.opensuse.org/request/show/1187597 Backports:SLE-15-SP6 / exim