CVE-2023-42114
Description
Exim NTLM Challenge Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose sensitive information 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 user-supplied data, which can result in a read past the end of an allocated data structure. An attacker can leverage this vulnerability to disclose information in the context of the service account. . Was ZDI-CAN-17433.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Mitigation details
CVE-2023-42114 NameCVE-2023-42114 DescriptionExim NTLM Challenge Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose sensitive information 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…
CVE-2023-42114
| Name | CVE-2023-42114 |
| Description | Exim NTLM Challenge Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose sensitive information 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 user-supplied data, which can result in a read past the end of an allocated data structure. An attacker can leverage this vulnerability to disclose information in the context of the service account. . Was ZDI-CAN-17433. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3599-1, DSA-5512-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| exim4 (PTS) | bullseye | 4.94.2-7+deb11u3 | fixed |
| bullseye (security) | 4.94.2-7+deb11u5 | fixed | |
| bookworm, bookworm (security) | 4.96-15+deb12u9 | fixed | |
| trixie (security), trixie | 4.98.2-1+deb13u2 | fixed | |
| forky, sid | 4.99.3-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| exim4 | source | buster | 4.92-8+deb10u8 | DLA-3599-1 | ||
| exim4 | source | bullseye | 4.94.2-7+deb11u1 | DSA-5512-1 | ||
| exim4 | source | bookworm | 4.96-15+deb12u2 | DSA-5512-1 | ||
| exim4 | source | (unstable) | 4.97~RC1-2 |
Notes
https://www.zerodayinitiative.com/advisories/ZDI-23-1468/
https://bugs.exim.org/show_bug.cgi?id=3001
https://git.exim.org/exim.git/log/refs/heads/exim-4.96%20security/exim.git/commit/ccf9816f54fb04ab5508eb8c7f00b08bc3531297 (exim-4.96.1)
https://www.openwall.com/lists/oss-security/2023/09/29/5
https://www.openwall.com/lists/oss-security/2023/10/01/4
https://exim.org/static/doc/security/CVE-2023-zdi.txt
Apply commands
https://www.zerodayinitiative.com/advisories/ZDI-23-1468/https://bugs.exim.org/show_bug.cgi?id=3001https://git.exim.org/exim.git/log/refs/heads/exim-4.96%20security/exim.git/commit/ccf9816f54fb04ab5508eb8c7f00b08bc3531297 (exim-4.96.1)https://www.openwall.com/lists/oss-security/2023/09/29/5https://www.openwall.com/lists/oss-security/2023/10/01/4https://exim.org/static/doc/security/CVE-2023-zdi.txtOS impact
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 4.97~RC1-2 |
| sid | Fixed | 4.97~RC1-2 |
| forky | Fixed | 4.97~RC1-2 |
| bullseye | Fixed | 4.94.2-7+deb11u1 |
| bookworm | Fixed | 4.96-15+deb12u2 |
References
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.