Samba 3.x < 3.3.15 / 3.4.12 / 3.5.7 'FD_SET' Memory Corruption

medium Nessus Plugin ID 52503

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Synopsis

The remote Samba server is affected by a memory corruption vulnerability.

Description

According to its banner, the version of Samba 3.x running on the remote host is earlier than 3.3.15 / 3.4.12 / 3.5.7. An error exists in the range checks on file descriptors in the 'FD_SET' macro that allows stack corruption. This corruption can cause Samba to crash or to continually try selecting on an improper descriptor set.

An attacker who is able to get a connection to a file share, either authenticated or via a guest connection, can leverage this issue to launch a denial of service attack against the affected smbd service.

Note the possibility of arbitrary code execution exists with this type of vulnerability but has not been confirmed.

Also note that Nessus has not actually tried to exploit this issue or otherwise determine if one of the patches has been applied.

Solution

Either apply one of the patches referenced in the project's advisory or upgrade to 3.3.15 / 3.4.12 / 3.5.7 or later.

Plugin Details

Severity: Medium

ID: 52503

File Name: samba_3_5_7.nasl

Version: 1.11

Type: remote

Family: Misc.

Published: 3/2/2011

Updated: 11/15/2018

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P

Vulnerability Information

CPE: cpe:/a:samba:samba

Required KB Items: SMB/NativeLanManager, SMB/samba, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 2/28/2011

Vulnerability Publication Date: 2/28/2011

Reference Information

CVE: CVE-2011-0719

BID: 46597

Secunia: 43512

Detections

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