CVE-2016-0777
Exposure of Sensitive Information to an Unauthorized Actor
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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.
Official description from the CVE record, published by redhat. Copyright © 1999-2026 The MITRE Corporation. See /security/cve/legal for the CVE license. View the record on cve.org
Key data
CVSS 3.1 Medium 6.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector: Network
The vulnerable component can be reached over a network, possibly from the Internet.
Attack complexity: Low
No special conditions are needed. The attack can be repeated at will.
Privileges required: Low
A basic user account is needed.
User interaction: None
No action from any user is needed.
Scope: Unchanged
The impact stays within the vulnerable component.
Confidentiality impact: High
Serious or total effect on the secrecy of data.
Integrity impact: None
No effect on the trustworthiness of data.
Availability impact: None
No effect on availability.
| Metric | Value | What it means |
|---|---|---|
| Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. |
| Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. |
| Privileges required | Low | A basic user account is needed. |
| User interaction | None | No action from any user is needed. |
| Scope | Unchanged | The impact stays within the vulnerable component. |
| Confidentiality impact | High | Serious or total effect on the secrecy of data. |
| Integrity impact | None | No effect on the trustworthiness of data. |
| Availability impact | None | No effect on availability. |
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EPSS
- Score
- 0.63468 (63.5% probability)
- Percentile
- 99.2%
- Scores of
- Nov 10, 2026
- Model
- v2026.06.15
CISA assessment as of May 29, 2026
- Automatable
- no
- Technical impact
- partial
Weakness (CWE)
- CWE-200Exposure of Sensitive Information to an Unauthorized Actor
References
- blogs.sophos.com/2016/02/17/utm-up2date-9-354-released
- SUSE-SU-2016:0117 (lists.opensuse.org)vendor-advisory
- blogs.sophos.com/2016/02/29/utm-up2date-9-319-released
- APPLE-SA-2016-03-21-5 (lists.apple.com)vendor-advisory
- h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?d…
- 20160114 Qualys Security Advisory - Roaming through the OpenSSH client: CVE-2016-0777 and CVE-2016-0778 (securityfocus.com)mailing-list
- support.apple.com/HT206167
- FEDORA-2016-4556904561 (lists.fedoraproject.org)vendor-advisory
- kb.juniper.net/InfoCenter/index?page=content&id=JSA10734
- 80695 (securityfocus.com)vdb-entry
- h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?d…
- FreeBSD-SA-16:07 (security.freebsd.org)vendor-advisory
- FEDORA-2016-c330264861 (lists.fedoraproject.org)vendor-advisory
- oracle.com/technetwork/topics/security/linuxbulletinjan2016…
- openssh.com/txt/release-7.1p2
- openSUSE-SU-2016:0128 (lists.opensuse.org)vendor-advisory
- FEDORA-2016-2e89eba0c1 (lists.fedoraproject.org)vendor-advisory
- bto.bluecoat.com/security-advisory/sa109
- 1034671 (securitytracker.com)vdb-entry
- openSUSE-SU-2016:0127 (lists.opensuse.org)vendor-advisory
- GLSA-201601-01 (security.gentoo.org)vendor-advisory
- h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?d…
- [oss-security] 20160114 Qualys Security Advisory - Roaming through the OpenSSH client: CVE-2016-0777 and CVE-2016-0778 (openwall.com)mailing-list
- 20160115 Qualys Security Advisory - Roaming through the OpenSSH client: CVE-2016-0777 and CVE-2016-0778 (seclists.org)mailing-list
- SUSE-SU-2016:0119 (lists.opensuse.org)vendor-advisory
- packetstormsecurity.com/files/135273/Qualys-Security-Adviso…
- SUSE-SU-2016:0118 (lists.opensuse.org)vendor-advisory
- FEDORA-2016-67c6ef0d4f (lists.fedoraproject.org)vendor-advisory
- SUSE-SU-2016:0120 (lists.opensuse.org)vendor-advisory
- USN-2869-1 (ubuntu.com)vendor-advisory
- h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?d…
- oracle.com/technetwork/topics/security/bulletinoct2015-2511…
- DSA-3446 (debian.org)vendor-advisory
- cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
Timeline
- ID reserved
- Record published
- Record last updated
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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:45 UTC. Sources and licenses