CVE-2023-42114

unknown

Published — · Modified —

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

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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

Exploit likelihood

20%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

Mitigation details

Source: Debian Security Tracker · View original ↗ · DFSG

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	Origin
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

Home - Debian Security - Source (Git)

Apply commands

text fix

Notes

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.txt

OS impact

OS	Version	Status	Fixed in
debian	bookworm	fixed	`4.96-15+deb12u2`
debian	bullseye	fixed	`4.94.2-7+deb11u1`
debian	forky	fixed	`4.97~RC1-2`
debian	sid	fixed	`4.97~RC1-2`
debian	trixie	fixed	`4.97~RC1-2`

References

https://security-tracker.debian.org/tracker/CVE-2023-42114

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.