Executive Summary
Summary | |
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Title | putty security update |
Informations | |||
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Name | DSA-2736 | First vendor Publication | 2013-08-11 |
Vendor | Debian | Last vendor Modification | 2013-08-11 |
Severity (Vendor) | N/A | Revision | 1 |
Security-Database Scoring CVSS v3
Cvss vector : N/A | |||
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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:M/Au:N/C:P/I:P/A:P) | |||
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Cvss Base Score | 6.8 | Attack Range | Network |
Cvss Impact Score | 6.4 | Attack Complexity | Medium |
Cvss Expoit Score | 8.6 | Authentication | None Required |
Calculate full CVSS 2.0 Vectors scores |
Detail
Several vulnerabilities where discovered in PuTTY, a Telnet/SSH client for X. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2013-4206 Mark Wooding discovered a heap-corrupting buffer underrun bug in the modmul function which performs modular multiplication. As the modmul function is called during validation of any DSA signature received by PuTTY, including during the initial key exchange phase, a malicious server could exploit this vulnerability before the client has received and verified a host key signature. An attack to this vulnerability can thus be performed by a man-in-the-middle between the SSH client and server, and the normal host key protections against man-in-the-middle attacks are bypassed. CVE-2013-4207 It was discovered that non-coprime values in DSA signatures can cause a buffer overflow in the calculation code of modular inverses when verifying a DSA signature. Such a signature is invalid. This bug however applies to any DSA signature received by PuTTY, including during the initial key exchange phase and thus it can be exploited by a malicious server before the client has received and verified a host key signature. CVE-2013-4208 It was discovered that private keys were left in memory after being used by PuTTY tools. CVE-2013-4852 Gergely Eberhardt from SEARCH-LAB Ltd. discovered that PuTTY is vulnerable to an integer overflow leading to heap overflow during the SSH handshake before authentication due to improper bounds checking of the length parameter received from the SSH server. A remote attacker could use this vulnerability to mount a local denial of service attack by crashing the putty client. Additionally this update backports some general proactive potentially security-relevant tightening from upstream. For the oldstable distribution (squeeze), these problems have been fixed in version 0.60+2010-02-20-1+squeeze2. This update also provides a fix for CVE-2011-4607, which was fixed for stable already. For the stable distribution (wheezy), these problems have been fixed in version 0.62-9+deb7u1. For the unstable distribution (sid), these problems have been fixed in version 0.63-1. We recommend that you upgrade your putty packages. |
Original Source
Url : http://www.debian.org/security/2013/dsa-2736 |
CWE : Common Weakness Enumeration
% | Id | Name |
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60 % | CWE-119 | Failure to Constrain Operations within the Bounds of a Memory Buffer |
20 % | CWE-200 | Information Exposure |
20 % | CWE-189 | Numeric Errors (CWE/SANS Top 25) |
OVAL Definitions
Definition Id: oval:org.mitre.oval:def:18299 | |||
Oval ID: | oval:org.mitre.oval:def:18299 | ||
Title: | DSA-2736-1 putty - several | ||
Description: | Several vulnerabilities where discovered in PuTTY, a Telnet/SSH client for X. | ||
Family: | unix | Class: | patch |
Reference(s): | DSA-2736-1 CVE-2013-4206 CVE-2013-4207 CVE-2013-4208 CVE-2013-4852 CVE-2011-4607 | Version: | 8 |
Platform(s): | Debian GNU/Linux 6.0 Debian GNU/Linux 7 Debian GNU/kFreeBSD 6.0 Debian GNU/kFreeBSD 7 | Product(s): | putty |
Definition Synopsis: | |||
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CPE : Common Platform Enumeration
OpenVAS Exploits
Date | Description |
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0000-00-00 | Name : FreeBSD Ports: putty File : nvt/freebsd_putty1.nasl |
Nessus® Vulnerability Scanner
Date | Description |
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2014-06-13 | Name : The remote openSUSE host is missing a security update. File : openSUSE-2013-655.nasl - Type : ACT_GATHER_INFO |
2014-06-13 | Name : The remote openSUSE host is missing a security update. File : openSUSE-2013-650.nasl - Type : ACT_GATHER_INFO |
2014-02-07 | Name : The remote Windows host has an application installed that is affected by mult... File : winscp_5_1_7.nasl - Type : ACT_GATHER_INFO |
2014-02-07 | Name : The remote Windows host has an application installed that is affected by an i... File : winscp_5_1_6.nasl - Type : ACT_GATHER_INFO |
2013-09-30 | Name : The remote Fedora host is missing a security update. File : fedora_2013-14794.nasl - Type : ACT_GATHER_INFO |
2013-09-15 | Name : The remote Gentoo host is missing one or more security-related patches. File : gentoo_GLSA-201309-08.nasl - Type : ACT_GATHER_INFO |
2013-08-22 | Name : The remote Gentoo host is missing one or more security-related patches. File : gentoo_GLSA-201308-01.nasl - Type : ACT_GATHER_INFO |
2013-08-21 | Name : The remote Fedora host is missing a security update. File : fedora_2013-14656.nasl - Type : ACT_GATHER_INFO |
2013-08-21 | Name : The remote Fedora host is missing a security update. File : fedora_2013-14676.nasl - Type : ACT_GATHER_INFO |
2013-08-20 | Name : The remote Fedora host is missing a security update. File : fedora_2013-14706.nasl - Type : ACT_GATHER_INFO |
2013-08-13 | Name : The remote Windows host has an application that is affected by multiple vulne... File : filezilla_373.nasl - Type : ACT_GATHER_INFO |
2013-08-13 | Name : The remote Windows host has an SSH client that is affected by multiple vulner... File : putty_063.nasl - Type : ACT_GATHER_INFO |
2013-08-13 | Name : The remote Windows host has an application that is affected by a remote integ... File : filezilla_372.nasl - Type : ACT_GATHER_INFO |
2013-08-13 | Name : The remote Debian host is missing a security-related update. File : debian_DSA-2736.nasl - Type : ACT_GATHER_INFO |
2013-08-08 | Name : The remote FreeBSD host is missing a security-related update. File : freebsd_pkg_4b448a96ff7311e2b28d080027ef73ec.nasl - Type : ACT_GATHER_INFO |
2011-12-21 | Name : The remote Windows host has an SSH client that is affected by an information ... File : putty_062.nasl - Type : ACT_GATHER_INFO |
2011-12-13 | Name : The remote FreeBSD host is missing a security-related update. File : freebsd_pkg_bbd5f48624f111e195bc080027ef73ec.nasl - Type : ACT_GATHER_INFO |
Alert History
Date | Informations |
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2014-02-17 11:32:05 |
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2013-08-23 21:22:06 |
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2013-08-21 00:21:51 |
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2013-08-20 17:25:51 |
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2013-08-12 00:20:24 |
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