National Vulnerability Database

National Vulnerability Database

National Vulnerability
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Search Parameters:
  • Contains Software Flaws (CVE)
  • CPE Product Version: cpe:/a:openbsd:openssh:-
There are 43 matching records.
Displaying matches 1 through 20.
Vuln ID Summary CVSS Severity
CVE-2019-6111

An issue was discovered in OpenSSH 7.9. Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the scp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious scp server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the scp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example, to overwrite the .ssh/authorized_keys file).

Published: January 31, 2019; 01:29:00 PM -05:00
V3: 5.9 MEDIUM
V2: 5.8 MEDIUM
CVE-2019-6110

In OpenSSH 7.9, due to accepting and displaying arbitrary stderr output from the server, a malicious server (or Man-in-The-Middle attacker) can manipulate the client output, for example to use ANSI control codes to hide additional files being transferred.

Published: January 31, 2019; 01:29:00 PM -05:00
V3: 6.8 MEDIUM
V2: 4.0 MEDIUM
CVE-2019-6109

An issue was discovered in OpenSSH 7.9. Due to missing character encoding in the progress display, a malicious server (or Man-in-The-Middle attacker) can employ crafted object names to manipulate the client output, e.g., by using ANSI control codes to hide additional files being transferred. This affects refresh_progress_meter() in progressmeter.c.

Published: January 31, 2019; 01:29:00 PM -05:00
V3: 6.8 MEDIUM
V2: 4.0 MEDIUM
CVE-2018-20685

In OpenSSH 7.9, scp.c in the scp client allows remote SSH servers to bypass intended access restrictions via the filename of . or an empty filename. The impact is modifying the permissions of the target directory on the client side.

Published: January 10, 2019; 04:29:00 PM -05:00
V3: 5.3 MEDIUM
V2: 2.6 LOW
CVE-2018-15473

OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying bailout for an invalid authenticating user until after the packet containing the request has been fully parsed, related to auth2-gss.c, auth2-hostbased.c, and auth2-pubkey.c.

Published: August 17, 2018; 03:29:00 PM -04:00
V3: 5.3 MEDIUM
V2: 5.0 MEDIUM
CVE-2016-10708

sshd in OpenSSH before 7.4 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via an out-of-sequence NEWKEYS message, as demonstrated by Honggfuzz, related to kex.c and packet.c.

Published: January 21, 2018; 05:29:00 PM -05:00
V3: 7.5 HIGH
V2: 5.0 MEDIUM
CVE-2016-1908

The client in OpenSSH before 7.2 mishandles failed cookie generation for untrusted X11 forwarding and relies on the local X11 server for access-control decisions, which allows remote X11 clients to trigger a fallback and obtain trusted X11 forwarding privileges by leveraging configuration issues on this X11 server, as demonstrated by lack of the SECURITY extension on this X11 server.

Published: April 11, 2017; 02:59:00 PM -04:00
V3: 9.8 CRITICAL
V2: 7.5 HIGH
CVE-2016-6210

sshd in OpenSSH before 7.3, when SHA256 or SHA512 are used for user password hashing, uses BLOWFISH hashing on a static password when the username does not exist, which allows remote attackers to enumerate users by leveraging the timing difference between responses when a large password is provided.

Published: February 13, 2017; 12:59:00 PM -05:00
V3: 5.9 MEDIUM
V2: 4.3 MEDIUM
CVE-2016-10012

The shared memory manager (associated with pre-authentication compression) in sshd in OpenSSH before 7.4 does not ensure that a bounds check is enforced by all compilers, which might allows local users to gain privileges by leveraging access to a sandboxed privilege-separation process, related to the m_zback and m_zlib data structures.

Published: January 04, 2017; 09:59:03 PM -05:00
V3: 7.8 HIGH
V2: 7.2 HIGH
CVE-2016-10011

authfile.c in sshd in OpenSSH before 7.4 does not properly consider the effects of realloc on buffer contents, which might allow local users to obtain sensitive private-key information by leveraging access to a privilege-separated child process.

Published: January 04, 2017; 09:59:03 PM -05:00
V3: 5.5 MEDIUM
V2: 2.1 LOW
CVE-2016-10010

sshd in OpenSSH before 7.4, when privilege separation is not used, creates forwarded Unix-domain sockets as root, which might allow local users to gain privileges via unspecified vectors, related to serverloop.c.

Published: January 04, 2017; 09:59:03 PM -05:00
V3: 7.0 HIGH
V2: 6.9 MEDIUM
CVE-2016-10009

Untrusted search path vulnerability in ssh-agent.c in ssh-agent in OpenSSH before 7.4 allows remote attackers to execute arbitrary local PKCS#11 modules by leveraging control over a forwarded agent-socket.

Published: January 04, 2017; 09:59:03 PM -05:00
V3: 7.3 HIGH
V2: 7.5 HIGH
CVE-2016-6515

The auth_password function in auth-passwd.c in sshd in OpenSSH before 7.3 does not limit password lengths for password authentication, which allows remote attackers to cause a denial of service (crypt CPU consumption) via a long string.

Published: August 07, 2016; 05:59:09 PM -04:00
V3: 7.5 HIGH
V2: 7.8 HIGH
CVE-2015-8325

The do_setup_env function in session.c in sshd in OpenSSH through 7.2p2, when the UseLogin feature is enabled and PAM is configured to read .pam_environment files in user home directories, allows local users to gain privileges by triggering a crafted environment for the /bin/login program, as demonstrated by an LD_PRELOAD environment variable.

Published: April 30, 2016; 09:59:00 PM -04:00
V3: 7.8 HIGH
V2: 7.2 HIGH
CVE-2016-3115

Multiple CRLF injection vulnerabilities in session.c in sshd in OpenSSH before 7.2p2 allow remote authenticated users to bypass intended shell-command restrictions via crafted X11 forwarding data, related to the (1) do_authenticated1 and (2) session_x11_req functions.

Published: March 22, 2016; 06:59:02 AM -04:00
V3: 6.4 MEDIUM
V2: 5.5 MEDIUM
CVE-2015-6564

Use-after-free vulnerability in the mm_answer_pam_free_ctx function in monitor.c in sshd in OpenSSH before 7.0 on non-OpenBSD platforms might allow local users to gain privileges by leveraging control of the sshd uid to send an unexpectedly early MONITOR_REQ_PAM_FREE_CTX request.

Published: August 23, 2015; 09:59:01 PM -04:00
V2: 6.9 MEDIUM
CVE-2015-6563

The monitor component in sshd in OpenSSH before 7.0 on non-OpenBSD platforms accepts extraneous username data in MONITOR_REQ_PAM_INIT_CTX requests, which allows local users to conduct impersonation attacks by leveraging any SSH login access in conjunction with control of the sshd uid to send a crafted MONITOR_REQ_PWNAM request, related to monitor.c and monitor_wrap.c.

Published: August 23, 2015; 09:59:00 PM -04:00
V2: 1.9 LOW
CVE-2015-5600

The kbdint_next_device function in auth2-chall.c in sshd in OpenSSH through 6.9 does not properly restrict the processing of keyboard-interactive devices within a single connection, which makes it easier for remote attackers to conduct brute-force attacks or cause a denial of service (CPU consumption) via a long and duplicative list in the ssh -oKbdInteractiveDevices option, as demonstrated by a modified client that provides a different password for each pam element on this list.

Published: August 02, 2015; 09:59:03 PM -04:00
V2: 8.5 HIGH
CVE-2015-5352

The x11_open_helper function in channels.c in ssh in OpenSSH before 6.9, when ForwardX11Trusted mode is not used, lacks a check of the refusal deadline for X connections, which makes it easier for remote attackers to bypass intended access restrictions via a connection outside of the permitted time window.

Published: August 02, 2015; 09:59:01 PM -04:00
V2: 4.3 MEDIUM
CVE-2014-9278

The OpenSSH server, as used in Fedora and Red Hat Enterprise Linux 7 and when running in a Kerberos environment, allows remote authenticated users to log in as another user when they are listed in the .k5users file of that user, which might bypass intended authentication requirements that would force a local login.

Published: December 06, 2014; 10:59:07 AM -05:00
V2: 4.0 MEDIUM