| 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, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-3599-1, DSA-5512-1, ELA-976-1 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| exim4 (PTS) | jessie, jessie (lts) | 4.84.2-2+deb8u12 | fixed |
| stretch (security) | 4.89-2+deb9u8 | vulnerable | |
| stretch (lts), stretch | 4.89-2+deb9u13 | fixed | |
| buster, buster (lts) | 4.92-8+deb10u10 | fixed | |
| buster (security) | 4.92-8+deb10u9 | fixed | |
| bullseye | 4.94.2-7+deb11u3 | fixed | |
| bullseye (security) | 4.94.2-7+deb11u4 | fixed | |
| bookworm | 4.96-15+deb12u6 | fixed | |
| bookworm (security) | 4.96-15+deb12u5 | fixed | |
| sid, trixie | 4.98-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| exim4 | source | jessie | 4.84.2-2+deb8u11 | ELA-976-1 | ||
| exim4 | source | stretch | 4.89-2+deb9u11 | ELA-976-1 | ||
| 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 |
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