CVE-2016-2110

Publication date 12 April 2016

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

The NTLMSSP authentication implementation in Samba 3.x and 4.x before 4.2.11, 4.3.x before 4.3.8, and 4.4.x before 4.4.2 allows man-in-the-middle attackers to perform protocol-downgrade attacks by modifying the client-server data stream to remove application-layer flags or encryption settings, as demonstrated by clearing the NTLMSSP_NEGOTIATE_SEAL or NTLMSSP_NEGOTIATE_SIGN option to disrupt LDAP security.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
samba	17.04 zesty	Fixed 2:4.3.8+dfsg-0ubuntu1
	16.10 yakkety	Fixed 2:4.3.8+dfsg-0ubuntu1
	16.04 LTS xenial	Fixed 2:4.3.8+dfsg-0ubuntu1
	15.10 wily	Fixed 2:4.3.8+dfsg-0ubuntu0.15.10.2
	14.04 LTS trusty	Fixed 2:4.3.8+dfsg-0ubuntu0.14.04.2
	12.04 LTS precise	Fixed 2:3.6.25-0ubuntu0.12.04.2
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
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Ignored end of life

Severity score breakdown

Parameter	Value
Base score	5.9 · Medium
Attack vector	Network
Attack complexity	High
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	High
Availability impact	None
Vector	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

References

Related Ubuntu Security Notices (USN)