Vulnerabilities (CVE)

Filtered by vendor Openbsd Subscribe
Filtered by product Openssh
Total 116 CVE
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2023-28531 2 Netapp, Openbsd 4 Brocade Fabric Operating System, Hci Bootstrap Os, Solidfire Element Os and 1 more 2024-11-21 N/A 9.8 CRITICAL
ssh-add in OpenSSH before 9.3 adds smartcard keys to ssh-agent without the intended per-hop destination constraints. The earliest affected version is 8.9.
CVE-2023-25136 3 Fedoraproject, Netapp, Openbsd 9 Fedora, 500f, 500f Firmware and 6 more 2024-11-21 N/A 6.5 MEDIUM
OpenSSH server (sshd) 9.1 introduced a double-free vulnerability during options.kex_algorithms handling. This is fixed in OpenSSH 9.2. The double free can be leveraged, by an unauthenticated remote attacker in the default configuration, to jump to any location in the sshd address space. One third-party report states "remote code execution is theoretically possible."
CVE-2021-41617 5 Fedoraproject, Netapp, Openbsd and 2 more 14 Fedora, Active Iq Unified Manager, Aff 500f and 11 more 2024-11-21 4.4 MEDIUM 7.0 HIGH
sshd in OpenSSH 6.2 through 8.x before 8.8, when certain non-default configurations are used, allows privilege escalation because supplemental groups are not initialized as expected. Helper programs for AuthorizedKeysCommand and AuthorizedPrincipalsCommand may run with privileges associated with group memberships of the sshd process, if the configuration specifies running the command as a different user.
CVE-2021-36368 2 Debian, Openbsd 2 Debian Linux, Openssh 2024-11-21 2.6 LOW 3.7 LOW
An issue was discovered in OpenSSH before 8.9. If a client is using public-key authentication with agent forwarding but without -oLogLevel=verbose, and an attacker has silently modified the server to support the None authentication option, then the user cannot determine whether FIDO authentication is going to confirm that the user wishes to connect to that server, or that the user wishes to allow that server to connect to a different server on the user's behalf. NOTE: the vendor's position is "this is not an authentication bypass, since nothing is being bypassed.
CVE-2021-28041 4 Fedoraproject, Netapp, Openbsd and 1 more 11 Fedora, Cloud Backup, Hci Compute Node and 8 more 2024-11-21 4.6 MEDIUM 7.1 HIGH
ssh-agent in OpenSSH before 8.5 has a double free that may be relevant in a few less-common scenarios, such as unconstrained agent-socket access on a legacy operating system, or the forwarding of an agent to an attacker-controlled host.
CVE-2020-15778 3 Broadcom, Netapp, Openbsd 10 Fabric Operating System, A700s, A700s Firmware and 7 more 2024-11-21 6.8 MEDIUM 7.8 HIGH
scp in OpenSSH through 8.3p1 allows command injection in the scp.c toremote function, as demonstrated by backtick characters in the destination argument. NOTE: the vendor reportedly has stated that they intentionally omit validation of "anomalous argument transfers" because that could "stand a great chance of breaking existing workflows."
CVE-2020-14145 2 Netapp, Openbsd 10 Active Iq Unified Manager, Aff A700s, Aff A700s Firmware and 7 more 2024-11-21 4.3 MEDIUM 5.9 MEDIUM
The client side in OpenSSH 5.7 through 8.4 has an Observable Discrepancy leading to an information leak in the algorithm negotiation. This allows man-in-the-middle attackers to target initial connection attempts (where no host key for the server has been cached by the client). NOTE: some reports state that 8.5 and 8.6 are also affected.
CVE-2020-12062 1 Openbsd 1 Openssh 2024-11-21 5.0 MEDIUM 7.5 HIGH
The scp client in OpenSSH 8.2 incorrectly sends duplicate responses to the server upon a utimes system call failure, which allows a malicious unprivileged user on the remote server to overwrite arbitrary files in the client's download directory by creating a crafted subdirectory anywhere on the remote server. The victim must use the command scp -rp to download a file hierarchy containing, anywhere inside, this crafted subdirectory. NOTE: the vendor points out that "this attack can achieve no more than a hostile peer is already able to achieve within the scp protocol" and "utimes does not fail under normal circumstances.
CVE-2019-6111 10 Apache, Canonical, Debian and 7 more 27 Mina Sshd, Ubuntu Linux, Debian Linux and 24 more 2024-11-21 5.8 MEDIUM 5.9 MEDIUM
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).
CVE-2019-6110 4 Netapp, Openbsd, Siemens and 1 more 9 Element Software, Ontap Select Deploy, Storage Automation Store and 6 more 2024-11-21 4.0 MEDIUM 6.8 MEDIUM
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.
CVE-2019-6109 9 Canonical, Debian, Fedoraproject and 6 more 28 Ubuntu Linux, Debian Linux, Fedora and 25 more 2024-11-21 4.0 MEDIUM 6.8 MEDIUM
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.
CVE-2018-20685 9 Canonical, Debian, Fujitsu and 6 more 30 Ubuntu Linux, Debian Linux, M10-1 and 27 more 2024-11-21 2.6 LOW 5.3 MEDIUM
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.
CVE-2018-15919 2 Netapp, Openbsd 7 Cloud Backup, Cn1610, Cn1610 Firmware and 4 more 2024-11-21 5.0 MEDIUM 5.3 MEDIUM
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.'
CVE-2018-15473 7 Canonical, Debian, Netapp and 4 more 24 Ubuntu Linux, Debian Linux, Aff Baseboard Management Controller and 21 more 2024-11-21 5.0 MEDIUM 5.3 MEDIUM
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.
CVE-2016-20012 2 Netapp, Openbsd 5 Clustered Data Ontap, Hci Management Node, Ontap Select Deploy Administration Utility and 2 more 2024-11-21 4.3 MEDIUM 5.3 MEDIUM
OpenSSH through 8.7 allows remote attackers, who have a suspicion that a certain combination of username and public key is known to an SSH server, to test whether this suspicion is correct. This occurs because a challenge is sent only when that combination could be valid for a login session. NOTE: the vendor does not recognize user enumeration as a vulnerability for this product
CVE-2016-10708 4 Canonical, Debian, Netapp and 1 more 12 Ubuntu Linux, Debian Linux, Cloud Backup and 9 more 2024-11-21 5.0 MEDIUM 7.5 HIGH
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.