CVE-2023-39176

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

A flaw was found within the parsing of SMB2 requests that have a transform header in the kernel ksmbd module. 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 buffer. An attacker can leverage this to disclose sensitive information on affected installations of Linux. Only systems with ksmbd enabled are vulnerable to this CVE.

Predictions

Exploit likelihood

20%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

Mitigation details

Source: Debian Security Tracker · View original ↗ · DFSG

CVE-2023-39176 NameCVE-2023-39176 DescriptionA flaw was found within the parsing of SMB2 requests that have a transform header in the kernel ksmbd module. 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 buffer. An attacker can leverage this to disclose sensitive information on affected installations of Linux. Only…

CVE-2023-39176

Name	CVE-2023-39176
Description	A flaw was found within the parsing of SMB2 requests that have a transform header in the kernel ksmbd module. 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 buffer. An attacker can leverage this to disclose sensitive information on affected installations of Linux. Only systems with ksmbd enabled are vulnerable to this CVE.
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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	bullseye	5.10.223-1	fixed
	bullseye (security)	5.10.257-1	fixed
	bookworm	6.1.170-3	fixed
	bookworm (security)	6.1.172-1	fixed
	trixie	6.12.86-1	fixed
	trixie (security)	6.12.90-1	fixed
	forky	7.0.9-1	fixed
	sid	7.0.10-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version
linux	source	bullseye	(not affected)
linux	source	bookworm	6.1.52-1
linux	source	(unstable)	6.5.3-1

Notes

[bullseye] - linux <not-affected> (Vulnerable code not present)
https://git.kernel.org/linus/5aa4fda5aa9c2a5a7bac67b4a12b089ab81fee3c (6.5-rc6)
https://git.kernel.org/linus/79ed288cef201f1f212dfb934bcaac75572fb8f6 (6.5-rc6)

Home - Debian Security - Source (Git)

Apply commands

text fix

Notes

[bullseye] - linux <not-affected> (Vulnerable code not present)https://git.kernel.org/linus/5aa4fda5aa9c2a5a7bac67b4a12b089ab81fee3c (6.5-rc6)https://git.kernel.org/linus/79ed288cef201f1f212dfb934bcaac75572fb8f6 (6.5-rc6)

OS impact

SUSE Affected 1 release

Version	Status	Fixed in
—	Affected	—

Debian Fixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`6.5.3-1`
sid	Fixed	`6.5.3-1`
forky	Fixed	`6.5.3-1`
bullseye	Fixed	`0`
bookworm	Fixed	`6.1.52-1`

References

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

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