CVE-2017-6542

PuTTY < 0.68 - 'ssh_agent_channel_data' Integer Overflow Heap Corruption

Severity Score

9.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

La función ssh_agent_channel_data en PuTTY en versiones anteriores a 0.68 permite a atacantes remotos tener un impacto no especificado a través de un valor de longitud grande en un mensaje de protocolo de agente y aprovechando la capacidad para conectarse al socket de Unix-domain que representa la conexión de agente reenviada, lo que desencadena un desbordamiento de búfer.

PuTTY versions prior to 0.68 suffer from an ssh_agent_channel_data integer overflow heap corruption vulnerability.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2017-03-08 CVE Reserved
2017-03-20 CVE Published
2023-11-08 EPSS Updated
2024-08-05 CVE Updated
2024-08-05 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

CAPEC

References (8)

URL	Tag	Source
http://www.securityfocus.com/bid/97156	Third Party Advisory
http://www.securitytracker.com/id/1038067	Vdb Entry
https://git.tartarus.org/?p=simon/putty.git%3Ba=commitdiff%3Bh=4ff22863d895cb7ebfced4cf923a012a614adaa8	X_refsource_confirm

URL	Date	SRC
https://www.exploit-db.com/exploits/42137	2024-08-05

URL	Date	SRC
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-agent-fwd-overflow.html	2023-11-07

URL	Date	SRC
http://lists.opensuse.org/opensuse-updates/2017-03/msg00055.html	2023-11-07
https://security.gentoo.org/glsa/201703-03	2023-11-07
https://security.gentoo.org/glsa/201706-09	2023-11-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Putty Search vendor "Putty"		Putty Search vendor "Putty" for product "Putty"				<= 0.67 Search vendor "Putty" for product "Putty" and version " <= 0.67"		-		Affected
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				42.2 Search vendor "Opensuse" for product "Leap" and version "42.2"		-		Affected
Opensuse Project Search vendor "Opensuse Project"		Leap Search vendor "Opensuse Project" for product "Leap"				42.1 Search vendor "Opensuse Project" for product "Leap" and version "42.1"		-		Affected