CVE-2016-0778

OpenSSH: Client buffer-overflow when using roaming connections

Severity Score

8.1

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The (1) roaming_read and (2) roaming_write functions in roaming_common.c in the client in OpenSSH 5.x, 6.x, and 7.x before 7.1p2, when certain proxy and forward options are enabled, do not properly maintain connection file descriptors, which allows remote servers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact by requesting many forwardings.

Las funciones (1) roaming_read y (2) roaming_write en roaming_common.c en el cliente en OpenSSH 5.x, 6.x y 7.x en versiones anteriores a 7.1p2, cuando ciertas opciones proxy y forward se encuentran habilitadas, no mantiene adecuadamente los descriptores de archivo de conexión, lo que permite a servidores remotos causar una denegación de servicio (desbordamiento de buffer basado en memoria dinámica) o posiblemente tener otro impacto no especificado mediante la petición de varios reenvíos.

A buffer overflow flaw was found in the way the OpenSSH client roaming feature was implemented. A malicious server could potentially use this flaw to execute arbitrary code on a successfully authenticated OpenSSH client if that client used certain non-default configuration options.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

High

Authentication

Single

Confidentiality

Partial

Integrity

Partial

Availability

Partial

Attack Vector

Network

Attack Complexity

High

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2015-12-16 CVE Reserved
2016-01-14 CVE Published
2024-08-05 CVE Updated
2024-08-05 First Exploit
2024-09-20 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-122: Heap-based Buffer Overflow

CAPEC

References (33)

URL	Tag	Source
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10734	Third Party Advisory
http://packetstormsecurity.com/files/135273/Qualys-Security-Advisory-OpenSSH-Overflow-Leak.html	Third Party Advisory
http://seclists.org/fulldisclosure/2016/Jan/44	Mailing List
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.html	Third Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html	Third Party Advisory
http://www.securityfocus.com/archive/1/537295/100/0/threaded	Mailing List
http://www.securityfocus.com/bid/80698	Third Party Advisory
http://www.securitytracker.com/id/1034671	Third Party Advisory
https://bto.bluecoat.com/security-advisory/sa109	Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05247375	Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05356388	Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05385680	Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722	Third Party Advisory

URL	Date	SRC
http://www.openwall.com/lists/oss-security/2016/01/14/7	2024-08-05

URL	Date	SRC
http://www.openssh.com/txt/release-7.1p2	2022-12-13

URL	Date	SRC
http://lists.apple.com/archives/security-announce/2016/Mar/msg00004.html	2022-12-13
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176516.html	2022-12-13
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176349.html	2022-12-13
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00006.html	2022-12-13
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00007.html	2022-12-13
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00008.html	2022-12-13
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00009.html	2022-12-13
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00013.html	2022-12-13
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00014.html	2022-12-13
http://www.debian.org/security/2016/dsa-3446	2022-12-13
http://www.ubuntu.com/usn/USN-2869-1	2022-12-13
https://blogs.sophos.com/2016/02/17/utm-up2date-9-354-released	2022-12-13
https://blogs.sophos.com/2016/02/29/utm-up2date-9-319-released	2022-12-13
https://security.gentoo.org/glsa/201601-01	2022-12-13
https://support.apple.com/HT206167	2022-12-13
https://access.redhat.com/security/cve/CVE-2016-0778	2016-01-14
https://bugzilla.redhat.com/show_bug.cgi?id=1298033	2016-01-14

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Oracle Search vendor "Oracle"		Linux Search vendor "Oracle" for product "Linux"				7 Search vendor "Oracle" for product "Linux" and version "7"		-		Affected
Oracle Search vendor "Oracle"		Solaris Search vendor "Oracle" for product "Solaris"				11.3 Search vendor "Oracle" for product "Solaris" and version "11.3"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				5.4 Search vendor "Openbsd" for product "Openssh" and version "5.4"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				5.4 Search vendor "Openbsd" for product "Openssh" and version "5.4"		p1		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				5.5 Search vendor "Openbsd" for product "Openssh" and version "5.5"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				5.5 Search vendor "Openbsd" for product "Openssh" and version "5.5"		p1		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				5.6 Search vendor "Openbsd" for product "Openssh" and version "5.6"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				5.6 Search vendor "Openbsd" for product "Openssh" and version "5.6"		p1		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				5.7 Search vendor "Openbsd" for product "Openssh" and version "5.7"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				5.7 Search vendor "Openbsd" for product "Openssh" and version "5.7"		p1		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				5.8 Search vendor "Openbsd" for product "Openssh" and version "5.8"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				5.8 Search vendor "Openbsd" for product "Openssh" and version "5.8"		p1		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				5.9 Search vendor "Openbsd" for product "Openssh" and version "5.9"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				5.9 Search vendor "Openbsd" for product "Openssh" and version "5.9"		p1		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				6.0 Search vendor "Openbsd" for product "Openssh" and version "6.0"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				6.0 Search vendor "Openbsd" for product "Openssh" and version "6.0"		p1		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				6.1 Search vendor "Openbsd" for product "Openssh" and version "6.1"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				6.1 Search vendor "Openbsd" for product "Openssh" and version "6.1"		p1		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				6.2 Search vendor "Openbsd" for product "Openssh" and version "6.2"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				6.2 Search vendor "Openbsd" for product "Openssh" and version "6.2"		p1		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				6.2 Search vendor "Openbsd" for product "Openssh" and version "6.2"		p2		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				6.3 Search vendor "Openbsd" for product "Openssh" and version "6.3"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				6.3 Search vendor "Openbsd" for product "Openssh" and version "6.3"		p1		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				6.4 Search vendor "Openbsd" for product "Openssh" and version "6.4"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				6.4 Search vendor "Openbsd" for product "Openssh" and version "6.4"		p1		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				6.5 Search vendor "Openbsd" for product "Openssh" and version "6.5"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				6.5 Search vendor "Openbsd" for product "Openssh" and version "6.5"		p1		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				6.6 Search vendor "Openbsd" for product "Openssh" and version "6.6"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				6.6 Search vendor "Openbsd" for product "Openssh" and version "6.6"		p1		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				6.7 Search vendor "Openbsd" for product "Openssh" and version "6.7"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				6.7 Search vendor "Openbsd" for product "Openssh" and version "6.7"		p1		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				6.8 Search vendor "Openbsd" for product "Openssh" and version "6.8"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				6.8 Search vendor "Openbsd" for product "Openssh" and version "6.8"		p1		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				6.9 Search vendor "Openbsd" for product "Openssh" and version "6.9"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				6.9 Search vendor "Openbsd" for product "Openssh" and version "6.9"		p1		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				7.0 Search vendor "Openbsd" for product "Openssh" and version "7.0"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				7.0 Search vendor "Openbsd" for product "Openssh" and version "7.0"		p1		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				7.1 Search vendor "Openbsd" for product "Openssh" and version "7.1"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				7.1 Search vendor "Openbsd" for product "Openssh" and version "7.1"		p1		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				>= 10.9.0 <= 10.9.5 Search vendor "Apple" for product "Mac Os X" and version " >= 10.9.0 <= 10.9.5"		-		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				>= 10.10.0 <= 10.10.5 Search vendor "Apple" for product "Mac Os X" and version " >= 10.10.0 <= 10.10.5"		-		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				>= 10.11.0 <= 10.11.3 Search vendor "Apple" for product "Mac Os X" and version " >= 10.11.0 <= 10.11.3"		-		Affected
Hp Search vendor "Hp"		Virtual Customer Access System Search vendor "Hp" for product "Virtual Customer Access System"				<= 15.07 Search vendor "Hp" for product "Virtual Customer Access System" and version " <= 15.07"		-		Affected
Sophos Search vendor "Sophos"		Unified Threat Management Software Search vendor "Sophos" for product "Unified Threat Management Software"				9.353 Search vendor "Sophos" for product "Unified Threat Management Software" and version "9.353"		-		Affected