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# CVE ID CWE ID # of Exploits Vulnerability Type(s) Publish Date Update Date Score Gained Access Level Access Complexity Authentication Conf. Integ. Avail.
1 CVE-2019-6111 20 Dir. Trav. 2019-01-31 2019-05-03
5.8
None Remote Medium Not required None Partial Partial
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).
2 CVE-2019-6110 284 2019-01-31 2019-04-18
4.0
None Remote High Not required Partial Partial None
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.
3 CVE-2019-6109 284 2019-01-31 2019-05-03
4.0
None Remote High Not required Partial Partial None
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.
4 CVE-2018-20685 706 Bypass 2019-01-10 2019-10-02
2.6
None Remote High Not required None Partial None
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.
5 CVE-2018-15919 200 +Info 2018-08-28 2018-12-22
5.0
None Remote Low Not required Partial None None
Remotely observable behaviour in auth-gss2.c in OpenSSH through 7.8 could be used by remote attackers to detect existence of users on a target system when GSS2 is in use. NOTE: the discoverer states 'We understand that the OpenSSH developers do not want to treat such a username enumeration (or "oracle") as a vulnerability.'
6 CVE-2018-15473 200 +Info 2018-08-17 2019-08-06
5.0
None Remote Low Not required Partial None None
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.
7 CVE-2017-15906 269 2017-10-25 2019-10-02
5.0
None Remote Low Not required None Partial None
The process_open function in sftp-server.c in OpenSSH before 7.6 does not properly prevent write operations in readonly mode, which allows attackers to create zero-length files.
8 CVE-2016-10708 476 DoS 2018-01-21 2019-06-26
5.0
None Remote Low Not required None None Partial
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.
9 CVE-2016-10012 119 Overflow +Priv 2017-01-04 2018-09-11
7.2
None Local Low Not required Complete Complete Complete
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.
10 CVE-2016-10011 320 +Info 2017-01-04 2018-09-11
2.1
None Local Low Not required Partial None None
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.
11 CVE-2016-10010 264 +Priv 2017-01-04 2018-05-31
6.9
None Local Medium Not required Complete Complete Complete
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.
12 CVE-2016-10009 426 2017-01-04 2018-09-11
7.5
None Remote Low Not required Partial Partial Partial
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.
13 CVE-2016-8858 399 DoS 2016-12-09 2018-09-19
7.8
None Remote Low Not required None None Complete
** DISPUTED ** The kex_input_kexinit function in kex.c in OpenSSH 6.x and 7.x through 7.3 allows remote attackers to cause a denial of service (memory consumption) by sending many duplicate KEXINIT requests. NOTE: a third party reports that "OpenSSH upstream does not consider this as a security issue."
14 CVE-2016-6515 20 DoS 2016-08-07 2018-09-11
7.8
None Remote Low Not required None None Complete
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.
15 CVE-2016-6210 200 +Info 2017-02-13 2018-01-04
4.3
None Remote Medium Not required Partial None None
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.
16 CVE-2016-3115 Bypass 2016-03-22 2018-09-11
5.5
None Remote Low Single system Partial Partial None
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.
17 CVE-2016-1908 254 2017-04-11 2018-09-11
7.5
None Remote Low Not required Partial Partial Partial
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.
18 CVE-2016-1907 119 DoS Overflow 2016-01-19 2017-02-16
5.0
None Remote Low Not required None None Partial
The ssh_packet_read_poll2 function in packet.c in OpenSSH before 7.1p2 allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via crafted network traffic.
19 CVE-2016-0778 119 DoS Overflow 2016-01-14 2018-10-09
4.6
None Remote High Single system Partial Partial Partial
The (1) roaming_read and (2) roaming_write functions in roaming_common.c in the client in OpenSSH 5.x, 6.x, and 7.x before 7.1p2, when certain proxy and forward options are enabled, do not properly maintain connection file descriptors, which allows remote servers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact by requesting many forwardings.
20 CVE-2016-0777 200 +Info 2016-01-14 2018-10-09
4.0
None Remote Low Single system Partial None None
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.
21 CVE-2015-8325 264 +Priv 2016-04-30 2018-06-29
7.2
None Local Low Not required Complete Complete Complete
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.
22 CVE-2015-6565 264 DoS 2015-08-23 2017-09-01
7.2
None Local Low Not required Complete Complete Complete
sshd in OpenSSH 6.8 and 6.9 uses world-writable permissions for TTY devices, which allows local users to cause a denial of service (terminal disruption) or possibly have unspecified other impact by writing to a device, as demonstrated by writing an escape sequence.
23 CVE-2015-6564 264 +Priv 2015-08-23 2018-09-11
6.9
None Local Medium Not required Complete Complete Complete
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.
24 CVE-2015-6563 20 2015-08-23 2018-09-11
1.9
None Local Medium Not required None Partial None
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.
25 CVE-2015-5600 264 DoS 2015-08-02 2018-09-11
8.5
None Remote Low Not required Partial None Complete
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.
26 CVE-2015-5352 264 Bypass 2015-08-02 2018-10-24
4.3
None Remote Medium Not required None Partial None
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.
27 CVE-2014-9278 287 Bypass 2014-12-06 2017-09-07
4.0
None Remote Low Single system None Partial None
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.
28 CVE-2014-2653 20 2014-03-27 2017-01-06
5.8
None Remote Medium Not required Partial Partial None
The verify_host_key function in sshconnect.c in the client in OpenSSH 6.6 and earlier allows remote servers to trigger the skipping of SSHFP DNS RR checking by presenting an unacceptable HostCertificate.
29 CVE-2014-2532 264 Bypass 2014-03-18 2018-07-18
5.8
None Remote Medium Not required Partial Partial None
sshd in OpenSSH before 6.6 does not properly support wildcards on AcceptEnv lines in sshd_config, which allows remote attackers to bypass intended environment restrictions by using a substring located before a wildcard character.
30 CVE-2014-1692 119 DoS Overflow Mem. Corr. 2014-01-29 2017-08-28
7.5
None Remote Low Not required Partial Partial Partial
The hash_buffer function in schnorr.c in OpenSSH through 6.4, when Makefile.inc is modified to enable the J-PAKE protocol, does not initialize certain data structures, which might allow remote attackers to cause a denial of service (memory corruption) or have unspecified other impact via vectors that trigger an error condition.
31 CVE-2013-4548 264 Bypass 2013-11-08 2019-10-09
6.0
None Remote Medium Single system Partial Partial Partial
The mm_newkeys_from_blob function in monitor_wrap.c in sshd in OpenSSH 6.2 and 6.3, when an AES-GCM cipher is used, does not properly initialize memory for a MAC context data structure, which allows remote authenticated users to bypass intended ForceCommand and login-shell restrictions via packet data that provides a crafted callback address.
32 CVE-2012-0814 255 +Info 2012-01-27 2017-08-28
3.5
None Remote Medium Single system Partial None None
The auth_parse_options function in auth-options.c in sshd in OpenSSH before 5.7 provides debug messages containing authorized_keys command options, which allows remote authenticated users to obtain potentially sensitive information by reading these messages, as demonstrated by the shared user account required by Gitolite. NOTE: this can cross privilege boundaries because a user account may intentionally have no shell or filesystem access, and therefore may have no supported way to read an authorized_keys file in its own home directory.
33 CVE-2011-5000 189 DoS 2012-04-05 2012-07-21
3.5
None Remote Medium Single system None None Partial
The ssh_gssapi_parse_ename function in gss-serv.c in OpenSSH 5.8 and earlier, when gssapi-with-mic authentication is enabled, allows remote authenticated users to cause a denial of service (memory consumption) via a large value in a certain length field. NOTE: there may be limited scenarios in which this issue is relevant.
34 CVE-2011-4327 200 +Info 2014-02-02 2014-02-21
2.1
None Local Low Not required Partial None None
ssh-keysign.c in ssh-keysign in OpenSSH before 5.8p2 on certain platforms executes ssh-rand-helper with unintended open file descriptors, which allows local users to obtain sensitive key information via the ptrace system call.
35 CVE-2011-0539 264 2011-02-10 2017-08-16
5.0
None Remote Low Not required Partial None None
The key_certify function in usr.bin/ssh/key.c in OpenSSH 5.6 and 5.7, when generating legacy certificates using the -t command-line option in ssh-keygen, does not initialize the nonce field, which might allow remote attackers to obtain sensitive stack memory contents or make it easier to conduct hash collision attacks.
36 CVE-2010-5107 DoS 2013-03-07 2017-09-18
5.0
None Remote Low Not required None None Partial
The default configuration of OpenSSH through 6.1 enforces a fixed time limit between establishing a TCP connection and completing a login, which makes it easier for remote attackers to cause a denial of service (connection-slot exhaustion) by periodically making many new TCP connections.
37 CVE-2010-4755 399 DoS 2011-03-02 2014-08-08
4.0
None Remote Low Single system None None Partial
The (1) remote_glob function in sftp-glob.c and the (2) process_put function in sftp.c in OpenSSH 5.8 and earlier, as used in FreeBSD 7.3 and 8.1, NetBSD 5.0.2, OpenBSD 4.7, and other products, allow remote authenticated users to cause a denial of service (CPU and memory consumption) via crafted glob expressions that do not match any pathnames, as demonstrated by glob expressions in SSH_FXP_STAT requests to an sftp daemon, a different vulnerability than CVE-2010-2632.
38 CVE-2010-4478 287 Bypass 2010-12-06 2017-09-18
7.5
None Remote Low Not required Partial Partial Partial
OpenSSH 5.6 and earlier, when J-PAKE is enabled, does not properly validate the public parameters in the J-PAKE protocol, which allows remote attackers to bypass the need for knowledge of the shared secret, and successfully authenticate, by sending crafted values in each round of the protocol, a related issue to CVE-2010-4252.
39 CVE-2009-2904 16 +Priv 2009-10-01 2017-09-18
6.9
None Local Medium Not required Complete Complete Complete
A certain Red Hat modification to the ChrootDirectory feature in OpenSSH 4.8, as used in sshd in OpenSSH 4.3 in Red Hat Enterprise Linux (RHEL) 5.4 and Fedora 11, allows local users to gain privileges via hard links to setuid programs that use configuration files within the chroot directory, related to requirements for directory ownership.
40 CVE-2008-5161 200 +Info 2008-11-19 2018-10-11
2.6
None Remote High Not required Partial None None
Error handling in the SSH protocol in (1) SSH Tectia Client and Server and Connector 4.0 through 4.4.11, 5.0 through 5.2.4, and 5.3 through 5.3.8; Client and Server and ConnectSecure 6.0 through 6.0.4; Server for Linux on IBM System z 6.0.4; Server for IBM z/OS 5.5.1 and earlier, 6.0.0, and 6.0.1; and Client 4.0-J through 4.3.3-J and 4.0-K through 4.3.10-K; and (2) OpenSSH 4.7p1 and possibly other versions, when using a block cipher algorithm in Cipher Block Chaining (CBC) mode, makes it easier for remote attackers to recover certain plaintext data from an arbitrary block of ciphertext in an SSH session via unknown vectors.
41 CVE-2008-4109 264 DoS 2008-09-18 2017-08-07
5.0
None Remote Low Not required None None Partial
A certain Debian patch for OpenSSH before 4.3p2-9etch3 on etch; before 4.6p1-1 on sid and lenny; and on other distributions such as SUSE uses functions that are not async-signal-safe in the signal handler for login timeouts, which allows remote attackers to cause a denial of service (connection slot exhaustion) via multiple login attempts. NOTE: this issue exists because of an incorrect fix for CVE-2006-5051.
42 CVE-2008-3844 20 2008-08-27 2017-08-07
9.3
None Remote Medium Not required Complete Complete Complete
Certain Red Hat Enterprise Linux (RHEL) 4 and 5 packages for OpenSSH, as signed in August 2008 using a legitimate Red Hat GPG key, contain an externally introduced modification (Trojan Horse) that allows the package authors to have an unknown impact. NOTE: since the malicious packages were not distributed from any official Red Hat sources, the scope of this issue is restricted to users who may have obtained these packages through unofficial distribution points. As of 20080827, no unofficial distributions of this software are known.
43 CVE-2008-3259 200 +Info 2008-07-22 2017-08-07
1.2
None Local High Not required Partial None None
OpenSSH before 5.1 sets the SO_REUSEADDR socket option when the X11UseLocalhost configuration setting is disabled, which allows local users on some platforms to hijack the X11 forwarding port via a bind to a single IP address, as demonstrated on the HP-UX platform.
44 CVE-2008-3234 264 2008-07-18 2017-09-28
6.5
User Remote Low Single system Partial Partial Partial
sshd in OpenSSH 4 on Debian GNU/Linux, and the 20070303 OpenSSH snapshot, allows remote authenticated users to obtain access to arbitrary SELinux roles by appending a :/ (colon slash) sequence, followed by the role name, to the username.
45 CVE-2008-1657 264 Bypass 2008-04-02 2018-10-11
6.5
None Remote Low Single system Partial Partial Partial
OpenSSH 4.4 up to versions before 4.9 allows remote authenticated users to bypass the sshd_config ForceCommand directive by modifying the .ssh/rc session file.
46 CVE-2008-1483 264 2008-03-24 2018-10-11
6.9
None Local Medium Not required Complete Complete Complete
OpenSSH 4.3p2, and probably other versions, allows local users to hijack forwarded X connections by causing ssh to set DISPLAY to :10, even when another process is listening on the associated port, as demonstrated by opening TCP port 6010 (IPv4) and sniffing a cookie sent by Emacs.
47 CVE-2007-4752 20 +Priv 2007-09-11 2018-10-15
7.5
User Remote Low Not required Partial Partial Partial
ssh in OpenSSH before 4.7 does not properly handle when an untrusted cookie cannot be created and uses a trusted X11 cookie instead, which allows attackers to violate intended policy and gain privileges by causing an X client to be treated as trusted.
48 CVE-2007-4654 399 DoS Overflow 2007-09-04 2018-10-15
5.0
None Remote Low Not required None None Partial
Unspecified vulnerability in SSHield 1.6.1 with OpenSSH 3.0.2p1 on Cisco WebNS 8.20.0.1 on Cisco Content Services Switch (CSS) series 11000 devices allows remote attackers to cause a denial of service (connection slot exhaustion and device crash) via a series of large packets designed to exploit the SSH CRC32 attack detection overflow (CVE-2001-0144), possibly a related issue to CVE-2002-1024.
49 CVE-2007-3102 2007-10-18 2017-10-10
4.3
None Remote Medium Not required None Partial None
Unspecified vulnerability in the linux_audit_record_event function in OpenSSH 4.3p2, as used on Fedora Core 6 and possibly other systems, allows remote attackers to write arbitrary characters to an audit log via a crafted username. NOTE: some of these details are obtained from third party information.
50 CVE-2007-2768 2007-05-21 2008-09-05
4.3
None Remote Medium Not required Partial None None
OpenSSH, when using OPIE (One-Time Passwords in Everything) for PAM, allows remote attackers to determine the existence of certain user accounts, which displays a different response if the user account exists and is configured to use one-time passwords (OTP), a similar issue to CVE-2007-2243.
Total number of vulnerabilities : 98   Page : 1 (This Page)2
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