Fedora 23 : proftpd-1.3.5a-5.fc23 (2015-7a89e8db70)

high Nessus Plugin ID 89294

Synopsis

The remote Fedora host is missing a security update.

Description

Part of the SFTP handshake involves 'extensions', which are key/value pairs, comprised of strings. In SSH, strings are encoded for network transport as a 32-bit length, followed by the bytes. The mod_sftp module currently places no bounds/length limitations when reading these SFTP extension key/value data from the network. A malicious attacker might attempt to encode large values, and allocate more memory than is necessary, causing excessive resource usage or the FTP daemon to crash. This update limits the amount of memory allocated to handle these extensions.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected proftpd package.

See Also

https://bugzilla.redhat.com/show_bug.cgi?id=1286977

http://www.nessus.org/u?74c8ae3f

Plugin Details

Severity: High

ID: 89294

File Name: fedora_2015-7a89e8db70.nasl

Version: 2.3

Type: local

Agent: unix

Published: 3/4/2016

Updated: 1/11/2021

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Vulnerability Information

CPE: p-cpe:/a:fedoraproject:fedora:proftpd, cpe:/o:fedoraproject:fedora:23

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Patch Publication Date: 12/11/2015

Reference Information