CVE-2015-8467

Publication date 16 December 2015

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

The samldb_check_user_account_control_acl function in dsdb/samdb/ldb_modules/samldb.c in Samba 4.x before 4.1.22, 4.2.x before 4.2.7, and 4.3.x before 4.3.3 does not properly check for administrative privileges during creation of machine accounts, which allows remote authenticated users to bypass intended access restrictions by leveraging the existence of a domain with both a Samba DC and a Windows DC, a similar issue to CVE-2015-2535.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
samba	17.04 zesty	Fixed 2:4.3.3+dfsg-1ubuntu1
	16.10 yakkety	Fixed 2:4.3.3+dfsg-1ubuntu1
	16.04 LTS xenial	Fixed 2:4.3.3+dfsg-1ubuntu1
	15.10 wily	Fixed 2:4.1.17+dfsg-4ubuntu3.1
	15.04 vivid	Fixed 2:4.1.13+dfsg-4ubuntu3.1
	14.04 LTS trusty	Fixed 2:4.1.6+dfsg-1ubuntu2.14.04.11
	12.04 LTS precise	Not affected
samba4	17.04 zesty	Not in release
	16.10 yakkety	Not in release
	16.04 LTS xenial	Not in release
	15.10 wily	Not in release
	15.04 vivid	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Ignored end of life

Notes

mdeslaur

4.0.0 to 4.3.2 (related to Microsoft issue CVE-2015-2535)

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
samba	Upstream: https://git.samba.org/?p=samba.git;a=commit;h=bf13cbd3f33c31483b172fc094b0e5946e899bc4

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	High
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-2855-1
Samba vulnerabilities
5 January 2016