CVE-2016-0777
MEDIUMCVSS 6.5/10EPSS 63.47%
Last modified
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/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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.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://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.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://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
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2016-0777?
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.
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.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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