Executive Summary

Summary
Title PuTTY: Buffer overflow
Informations
Name GLSA-201703-03 First vendor Publication 2017-03-19
Vendor Gentoo Last vendor Modification 2017-03-19
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Cvss Base Score 7.5 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores

Detail

Synopsis

A buffer overflow in PuTTY might allow remote attackers to execute arbitrary code or cause a denial of service.

Background

PuTTY is a free implementation of Telnet and SSH for Windows and Unix platforms, along with an xterm terminal emulator.

Description

A heap-corrupting buffer overflow bug in the ssh_agent_channel_data function of PuTTY was found.

Impact

A remote attacker, utilizing the SSH agent forwarding of an SSH server, could execute arbitrary code with the privileges of the user running the client or cause a Denial of Service condition.

Workaround

There is no known workaround at this time.

Resolution

All PuTTY users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/putty-0.68"

References

[ 1 ] CVE-2017-6542 : http://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-6542

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

https://security.gentoo.org/glsa/201703-03

Original Source

Url : http://security.gentoo.org/glsa/glsa-201703-03.xml

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-119 Failure to Constrain Operations within the Bounds of a Memory Buffer

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 26
Os 1
Os 1

Nessus® Vulnerability Scanner

Date Description
2017-07-21 Name : The remote Fedora host is missing a security update.
File : fedora_2017-efdd962fee.nasl - Type : ACT_GATHER_INFO
2017-06-07 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201706-09.nasl - Type : ACT_GATHER_INFO
2017-03-20 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-201703-03.nasl - Type : ACT_GATHER_INFO
2017-03-20 Name : The remote openSUSE host is missing a security update.
File : openSUSE-2017-354.nasl - Type : ACT_GATHER_INFO
2017-03-17 Name : The remote FreeBSD host is missing a security-related update.
File : freebsd_pkg_9b973e970a9911e7ace7080027ef73ec.nasl - Type : ACT_GATHER_INFO

Alert History

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Date Informations
2017-07-01 09:25:35
  • Multiple Updates
2017-04-01 00:24:43
  • Multiple Updates
2017-03-27 21:22:44
  • Multiple Updates
2017-03-21 13:25:55
  • Multiple Updates
2017-03-19 21:25:00
  • First insertion