National Vulnerability Database

National Vulnerability Database

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    Vulnerabilities Detail

CVE-2017-6542 Detail

Current Description

The ssh_agent_channel_data function in PuTTY before 0.68 allows remote attackers to have unspecified impact via a large length value in an agent protocol message and leveraging the ability to connect to the Unix-domain socket representing the forwarded agent connection, which trigger a buffer overflow.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 9.8 CRITICAL
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H (V3 legend)
Impact Score: 5.9
Exploitability Score: 3.9

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 7.5 HIGH
Vector: (AV:N/AC:L/Au:N/C:P/I:P/A:P) (V2 legend)
Impact Subscore: 6.4
Exploitability Subscore: 10.0

Access Vector (AV): Network
Access Complexity (AC): Insufficient_Info
Authentication (AU): None
Confidentiality (C): Partial
Integrity (I): Partial
Availability (A): Partial
Additional Information:
Allows unauthorized disclosure of information
Allows unauthorized modification
Allows disruption of service

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.opensuse.org/opensuse-updates/2017-03/msg00055.html Third Party Advisory
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-agent-fwd-overflow.html Patch Vendor Advisory
http://www.securityfocus.com/bid/97156 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1038067
https://git.tartarus.org/?p=simon/putty.git;a=commitdiff;h=4ff22863d895cb7ebfced4cf923a012a614adaa8 Patch Third Party Advisory
https://security.gentoo.org/glsa/201703-03 Third Party Advisory VDB Entry
https://security.gentoo.org/glsa/201706-09
https://www.exploit-db.com/exploits/42137/

Technical Details

Vulnerability Type (View All)

  • Improper Restriction of Operations within the Bounds of a Memory Buffer (CWE-119)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:putty:putty:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
0.67

Configuration 2 ( hide )
 cpe:2.3:o:opensuse:leap:42.2:*:*:*:*:*:*:*
     Show Matching CPE(s)
 cpe:2.3:o:opensuse_project:leap:42.1:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

6 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2017-6542
NVD Published Date:
03/27/2017
NVD Last Modified:
10/30/2018