CVE-2015-5309

Gentoo Linux Security Advisory 201606-01

Severity Score

9.8

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Integer overflow in the terminal emulator in PuTTY before 0.66 allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via an ECH (erase characters) escape sequence with a large parameter value, which triggers a buffer underflow.

Desbordamiento de entero en el emulador de terminal en PuTTY en versiones anteriores a 0.66 permite a atacantes remotos causar una denegación de servicio (corrupción de memoria) o posiblemente ejecutar código arbitrario a través de una secuencia de escape ECH (borrar caracteres) con un valor de parámetro grande, que desencadena un desbordamiento inferior de buffer.

A memory-corrupting integer overflow in the handling of the ECH (erase characters) control sequence was discovered in PuTTY's terminal emulator. A remote attacker can take advantage of this flaw to mount a denial of service or potentially to execute arbitrary code.

*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

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2015-07-01 CVE Reserved
2015-12-02 CVE Published
2024-08-06 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-189: Numeric Errors

CAPEC

References (7)

URL	Tag	Source
http://www.securitytracker.com/id/1034308	Vdb Entry

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://lists.fedoraproject.org/pipermail/package-announce/2015-December/173021.html	2018-10-30
http://lists.fedoraproject.org/pipermail/package-announce/2015-December/173094.html	2018-10-30
http://lists.opensuse.org/opensuse-updates/2015-11/msg00099.html	2018-10-30
http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/vuln-ech-overflow.html	2018-10-30
http://www.debian.org/security/2015/dsa-3409	2018-10-30
https://security.gentoo.org/glsa/201606-01	2018-10-30

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Opensuse Search vendor "Opensuse"		Leap Search vendor "Opensuse" for product "Leap"				42.1 Search vendor "Opensuse" for product "Leap" and version "42.1"		-		Affected
Opensuse Search vendor "Opensuse"		Opensuse Search vendor "Opensuse" for product "Opensuse"				13.1 Search vendor "Opensuse" for product "Opensuse" and version "13.1"		-		Affected
Opensuse Search vendor "Opensuse"		Opensuse Search vendor "Opensuse" for product "Opensuse"				13.2 Search vendor "Opensuse" for product "Opensuse" and version "13.2"		-		Affected
Simon Tatham Search vendor "Simon Tatham"		Putty Search vendor "Simon Tatham" for product "Putty"				<= 0.65 Search vendor "Simon Tatham" for product "Putty" and version " <= 0.65"		-		Affected