CVE-2016-0777

OpenSSH: Client Information leak due to use of roaming connection feature

Severity Score

6.5

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The resend_bytes function in roaming_common.c in the client in OpenSSH 5.x, 6.x, and 7.x before 7.1p2 allows remote servers to obtain sensitive information from process memory by requesting transmission of an entire buffer, as demonstrated by reading a private key.

La función resend_bytes en roaming_common.c en el cliente en OpenSSH 5.x, 6.x y 7.x en versiones anteriores a 7.1p2 permite a servidores remotos obtener información sensible desde la memoria de proceso mediante la petición de transmisión de un buffer completo, según lo demostrado mediante la lectura de una clave privada.

An information leak flaw was found in the way the OpenSSH client roaming feature was implemented. A malicious server could potentially use this flaw to leak portions of memory (possibly including private SSH keys) of a successfully authenticated OpenSSH client.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

Single

Confidentiality

Partial

Integrity

None

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

Partial

Integrity

None

Availability

None

* 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
2024-08-12 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
CWE-682: Incorrect Calculation

CAPEC

References (37)

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.openwall.com/lists/oss-security/2016/01/14/7	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/80695	Third Party Advisory
http://www.securitytracker.com/id/1034671	Third Party Advisory
https://blogs.sophos.com/2016/02/17/utm-up2date-9-354-released	Third Party Advisory
https://blogs.sophos.com/2016/02/29/utm-up2date-9-319-released	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
https://support.apple.com/HT206167	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

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/175592.html	2022-12-13
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175676.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.openssh.com/txt/release-7.1p2	2022-12-13
http://www.ubuntu.com/usn/USN-2869-1	2022-12-13
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:07.openssh.asc	2022-12-13
https://security.gentoo.org/glsa/201601-01	2022-12-13
https://access.redhat.com/security/cve/CVE-2016-0777	2016-01-14
https://bugzilla.redhat.com/show_bug.cgi?id=1298032	2016-01-14
https://access.redhat.com/articles/2123781	2016-01-14

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Sophos Search vendor "Sophos"	Unified Threat Management Software Search vendor "Sophos" for product "Unified Threat Management Software"	9.318 Search vendor "Sophos" for product "Unified Threat Management Software" and version "9.318"	-	Affected	in	Sophos Search vendor "Sophos"	Unified Threat Management Search vendor "Sophos" for product "Unified Threat Management"	110 Search vendor "Sophos" for product "Unified Threat Management" and version "110"	-	Safe
Sophos Search vendor "Sophos"	Unified Threat Management Software Search vendor "Sophos" for product "Unified Threat Management Software"	9.318 Search vendor "Sophos" for product "Unified Threat Management Software" and version "9.318"	-	Affected	in	Sophos Search vendor "Sophos"	Unified Threat Management Search vendor "Sophos" for product "Unified Threat Management"	120 Search vendor "Sophos" for product "Unified Threat Management" and version "120"	-	Safe
Sophos Search vendor "Sophos"	Unified Threat Management Software Search vendor "Sophos" for product "Unified Threat Management Software"	9.318 Search vendor "Sophos" for product "Unified Threat Management Software" and version "9.318"	-	Affected	in	Sophos Search vendor "Sophos"	Unified Threat Management Search vendor "Sophos" for product "Unified Threat Management"	220 Search vendor "Sophos" for product "Unified Threat Management" and version "220"	-	Safe
Sophos Search vendor "Sophos"	Unified Threat Management Software Search vendor "Sophos" for product "Unified Threat Management Software"	9.318 Search vendor "Sophos" for product "Unified Threat Management Software" and version "9.318"	-	Affected	in	Sophos Search vendor "Sophos"	Unified Threat Management Search vendor "Sophos" for product "Unified Threat Management"	320 Search vendor "Sophos" for product "Unified Threat Management" and version "320"	-	Safe
Sophos Search vendor "Sophos"	Unified Threat Management Software Search vendor "Sophos" for product "Unified Threat Management Software"	9.318 Search vendor "Sophos" for product "Unified Threat Management Software" and version "9.318"	-	Affected	in	Sophos Search vendor "Sophos"	Unified Threat Management Search vendor "Sophos" for product "Unified Threat Management"	425 Search vendor "Sophos" for product "Unified Threat Management" and version "425"	-	Safe
Sophos Search vendor "Sophos"	Unified Threat Management Software Search vendor "Sophos" for product "Unified Threat Management Software"	9.318 Search vendor "Sophos" for product "Unified Threat Management Software" and version "9.318"	-	Affected	in	Sophos Search vendor "Sophos"	Unified Threat Management Search vendor "Sophos" for product "Unified Threat Management"	525 Search vendor "Sophos" for product "Unified Threat Management" and version "525"	-	Safe
Sophos Search vendor "Sophos"	Unified Threat Management Software Search vendor "Sophos" for product "Unified Threat Management Software"	9.318 Search vendor "Sophos" for product "Unified Threat Management Software" and version "9.318"	-	Affected	in	Sophos Search vendor "Sophos"	Unified Threat Management Search vendor "Sophos" for product "Unified Threat Management"	625 Search vendor "Sophos" for product "Unified Threat Management" and version "625"	-	Safe
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	in	Sophos Search vendor "Sophos"	Unified Threat Management Search vendor "Sophos" for product "Unified Threat Management"	110 Search vendor "Sophos" for product "Unified Threat Management" and version "110"	-	Safe
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	in	Sophos Search vendor "Sophos"	Unified Threat Management Search vendor "Sophos" for product "Unified Threat Management"	120 Search vendor "Sophos" for product "Unified Threat Management" and version "120"	-	Safe
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	in	Sophos Search vendor "Sophos"	Unified Threat Management Search vendor "Sophos" for product "Unified Threat Management"	220 Search vendor "Sophos" for product "Unified Threat Management" and version "220"	-	Safe
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	in	Sophos Search vendor "Sophos"	Unified Threat Management Search vendor "Sophos" for product "Unified Threat Management"	320 Search vendor "Sophos" for product "Unified Threat Management" and version "320"	-	Safe
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	in	Sophos Search vendor "Sophos"	Unified Threat Management Search vendor "Sophos" for product "Unified Threat Management"	425 Search vendor "Sophos" for product "Unified Threat Management" and version "425"	-	Safe
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	in	Sophos Search vendor "Sophos"	Unified Threat Management Search vendor "Sophos" for product "Unified Threat Management"	525 Search vendor "Sophos" for product "Unified Threat Management" and version "525"	-	Safe
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	in	Sophos Search vendor "Sophos"	Unified Threat Management Search vendor "Sophos" for product "Unified Threat Management"	625 Search vendor "Sophos" for product "Unified Threat Management" and version "625"	-	Safe
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"				5.0 Search vendor "Openbsd" for product "Openssh" and version "5.0"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				5.0 Search vendor "Openbsd" for product "Openssh" and version "5.0"		p1		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				5.1 Search vendor "Openbsd" for product "Openssh" and version "5.1"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				5.1 Search vendor "Openbsd" for product "Openssh" and version "5.1"		p1		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				5.2 Search vendor "Openbsd" for product "Openssh" and version "5.2"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				5.2 Search vendor "Openbsd" for product "Openssh" and version "5.2"		p1		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				5.3 Search vendor "Openbsd" for product "Openssh" and version "5.3"		-		Affected
Openbsd Search vendor "Openbsd"		Openssh Search vendor "Openbsd" for product "Openssh"				5.3 Search vendor "Openbsd" for product "Openssh" and version "5.3"		p1		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
Hp Search vendor "Hp"		Remote Device Access Virtual Customer Access System Search vendor "Hp" for product "Remote Device Access Virtual Customer Access System"				<= 15.07 Search vendor "Hp" for product "Remote Device Access Virtual Customer Access System" and version " <= 15.07"		-		Affected
Apple Search vendor "Apple"		Mac Os X Search vendor "Apple" for product "Mac Os X"				<= 10.11.3 Search vendor "Apple" for product "Mac Os X" and version " <= 10.11.3"		-		Affected