CVE-2016-0777

Name: CVE-2016-0777
Creator: NVD / NIST
Published: 2016-01-14T22:59:01.14+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 63.47%

Last modified Jun 17, 2026

CVE-2016-0777 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 63.47% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

63.47%

99.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Sophos	Unified Threat Management Software	9.318
Sophos	Unified Threat Management Software	9.353
Oracle	Linux	7
Oracle	Solaris	11.3
Openbsd	Openssh	5.0
Openbsd	Openssh	5.1
Openbsd	Openssh	5.2
Openbsd	Openssh	5.3
Openbsd	Openssh	5.4
Openbsd	Openssh	5.5
Openbsd	Openssh	5.6
Openbsd	Openssh	5.7
Openbsd	Openssh	5.8
Openbsd	Openssh	5.9
Openbsd	Openssh	6.0
Openbsd	Openssh	6.1
Openbsd	Openssh	6.2
Openbsd	Openssh	6.3
Openbsd	Openssh	6.4
Openbsd	Openssh	6.5
Openbsd	Openssh	6.6
Openbsd	Openssh	6.7
Openbsd	Openssh	6.8
Openbsd	Openssh	6.9
Openbsd	Openssh	7.0
Openbsd	Openssh	7.1
Hp	Remote Device Access Virtual Customer Access System	<= 15.07
Apple	Mac Os X	<= 10.11.3

References

http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10734Third Party Advisory
http://lists.apple.com/archives/security-announce/2016/Mar/msg00004.htmlMailing List, Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176516.htmlMailing List, Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175592.htmlMailing List, Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175676.htmlMailing List, Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176349.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00006.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00007.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00008.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00009.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00013.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00014.htmlMailing List, Third Party Advisory
http://packetstormsecurity.com/files/135273/Qualys-Security-Advisory-OpenSSH-Overflow-Leak.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2016/Jan/44Mailing List, Third Party Advisory
http://www.debian.org/security/2016/dsa-3446Third Party Advisory
http://www.openssh.com/txt/release-7.1p2Vendor Advisory
http://www.openwall.com/lists/oss-security/2016/01/14/7Mailing List, Third Party Advisory
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.htmlThird Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.htmlThird Party Advisory
http://www.securityfocus.com/archive/1/537295/100/0/threadedThird Party Advisory, VDB Entry
http://www.securityfocus.com/bid/80695Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1034671Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/USN-2869-1Third 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/sa109Third 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-c05247375Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05356388Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05385680Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722Third Party Advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:07.openssh.ascThird Party Advisory
https://security.gentoo.org/glsa/201601-01Third Party Advisory
https://support.apple.com/HT206167Third Party Advisory
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10734Third Party Advisory
http://lists.apple.com/archives/security-announce/2016/Mar/msg00004.htmlMailing List, Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176516.htmlMailing List, Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175592.htmlMailing List, Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175676.htmlMailing List, Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176349.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00006.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00007.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00008.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00009.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00013.htmlMailing List, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-01/msg00014.htmlMailing List, Third Party Advisory
http://packetstormsecurity.com/files/135273/Qualys-Security-Advisory-OpenSSH-Overflow-Leak.htmlThird Party Advisory, VDB Entry
http://seclists.org/fulldisclosure/2016/Jan/44Mailing List, Third Party Advisory
http://www.debian.org/security/2016/dsa-3446Third Party Advisory
http://www.openssh.com/txt/release-7.1p2Vendor Advisory
http://www.openwall.com/lists/oss-security/2016/01/14/7Mailing List, Third Party Advisory
http://www.oracle.com/technetwork/topics/security/bulletinoct2015-2511968.htmlThird Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.htmlThird Party Advisory
http://www.securityfocus.com/archive/1/537295/100/0/threadedThird Party Advisory, VDB Entry
http://www.securityfocus.com/bid/80695Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1034671Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/USN-2869-1Third 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/sa109Third 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-c05247375Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05356388Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05385680Third Party Advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722Third Party Advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-16:07.openssh.ascThird Party Advisory
https://security.gentoo.org/glsa/201601-01Third Party Advisory
https://support.apple.com/HT206167Third Party Advisory

Timeline

Published: Jan 14, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-0777?

How severe is CVE-2016-0777?

CVE-2016-0777 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 63.47% probability of exploitation in the next 30 days.

How do I fix CVE-2016-0777?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-0777?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST