rpm package
almalinux/libssh-config
pkg:rpm/almalinux/libssh-config
Vulnerabilities (19)
| CVE | Sev | CVSS | KEV | Affected versions | Fixed in | Published | Description |
|---|---|---|---|---|---|---|---|
| CVE-2026-0968 | Low | 3.1 | < 0.12.0-2.el10 | 0.12.0-2.el10 | Mar 26, 2026 | A flaw was found in libssh in which a malicious SFTP (SSH File Transfer Protocol) server can exploit this by sending a malformed 'longname' field within an `SSH_FXP_NAME` message during a file listing operation. This missing null check can lead to reading beyond allocated memory | |
| CVE-2026-0967 | Med | 5.5 | < 0.12.0-2.el10 | 0.12.0-2.el10 | Mar 26, 2026 | A flaw was found in libssh. A remote attacker, by controlling client configuration files or known_hosts files, could craft specific hostnames that when processed by the `match_pattern()` function can lead to inefficient regular expression backtracking. This can cause timeouts and | |
| CVE-2026-0966 | Hig | 8.2 | < 0.12.0-2.el10 | 0.12.0-2.el10 | Mar 26, 2026 | A flaw was found in libssh. The API function `ssh_get_hexa()` is vulnerable to a denial of service when processing zero-length input. This can be exploited remotely by an attacker during GSSAPI (Generic Security Service Application Program Interface) authentication if the server' | |
| CVE-2026-0965 | Low | 3.3 | < 0.12.0-2.el10 | 0.12.0-2.el10 | Mar 26, 2026 | A flaw was found in libssh where it can attempt to open arbitrary files during configuration parsing. A local attacker can exploit this by providing a malicious configuration file or when the system is misconfigured. This vulnerability could lead to a Denial of Service (DoS) by c | |
| CVE-2026-0964 | Med | 6.3 | < 0.12.0-2.el10 | 0.12.0-2.el10 | Mar 26, 2026 | A malicious SCP server can send unexpected paths that could make the client application override local files outside of working directory. This could be misused to create malicious executable or configuration files and make the user execute them under specific consequences. This | |
| CVE-2025-8277 | Low | 3.1 | < 0.10.4-18.el9 | 0.10.4-18.el9 | Sep 9, 2025 | A flaw was found in libssh's handling of key exchange (KEX) processes when a client repeatedly sends incorrect KEX guesses. The library fails to free memory during these rekey operations, which can gradually exhaust system memory. This issue can lead to crashes on the client side | |
| CVE-2025-4877 | Med | 4.5 | < 0.10.4-18.el9 | 0.10.4-18.el9 | Aug 20, 2025 | There's a vulnerability in the libssh package where when a libssh consumer passes in an unexpectedly large input buffer to ssh_get_fingerprint_hash() function. In such cases the bin_to_base64() function can experience an integer overflow leading to a memory under allocation, when | |
| CVE-2025-8114 | Med | 4.7 | < 0.10.4-18.el9 | 0.10.4-18.el9 | Jul 24, 2025 | A flaw was found in libssh, a library that implements the SSH protocol. When calculating the session ID during the key exchange (KEX) process, an allocation failure in cryptographic functions may lead to a NULL pointer dereference. This issue can cause the client or server to cra | |
| CVE-2025-4878 | Low | 3.6 | < 0.10.4-18.el9 | 0.10.4-18.el9 | Jul 22, 2025 | A vulnerability was found in libssh, where an uninitialized variable exists under certain conditions in the privatekey_from_file() function. This flaw can be triggered if the file specified by the filename doesn't exist and may lead to possible signing failures or heap corruption | |
| CVE-2025-5987 | — | < 0.10.4-17.el9_7 | 0.10.4-17.el9_7 | Jul 7, 2025 | A flaw was found in libssh when using the ChaCha20 cipher with the OpenSSL library. If an attacker manages to exhaust the heap space, this error is not detected and may lead to libssh using a partially initialized cipher context. This occurs because the OpenSSL error code returne | ||
| CVE-2025-5351 | Med | 6.5 | < 0.10.4-18.el9 | 0.10.4-18.el9 | Jul 4, 2025 | A flaw was found in the key export functionality of libssh. The issue occurs in the internal function responsible for converting cryptographic keys into serialized formats. During error handling, a memory structure is freed but not cleared, leading to a potential double free issu | |
| CVE-2025-5372 | Med | 5.0 | < 0.9.6-16.el8_10 | 0.9.6-16.el8_10 | Jul 4, 2025 | A flaw was found in libssh versions built with OpenSSL versions older than 3.0, specifically in the ssh_kdf() function responsible for key derivation. Due to inconsistent interpretation of return values where OpenSSL uses 0 to indicate failure and libssh uses 0 for success—the fu | |
| CVE-2025-5318 | — | < 0.11.1-4.el10_0 | 0.11.1-4.el10_0 | Jun 24, 2025 | A flaw was found in the libssh library in versions less than 0.11.2. An out-of-bounds read can be triggered in the sftp_handle function due to an incorrect comparison check that permits the function to access memory beyond the valid handle list and to return an invalid pointer, w | ||
| CVE-2023-6004 | — | < 0.10.4-13.el9 | 0.10.4-13.el9 | Jan 3, 2024 | A flaw was found in libssh. By utilizing the ProxyCommand or ProxyJump feature, users can exploit unchecked hostname syntax on the client. This issue may allow an attacker to inject malicious code into the command of the features mentioned through the hostname parameter. | ||
| CVE-2023-6918 | — | < 0.10.4-13.el9 | 0.10.4-13.el9 | Dec 18, 2023 | A flaw was found in the libssh implements abstract layer for message digest (MD) operations implemented by different supported crypto backends. The return values from these were not properly checked, which could cause low-memory situations failures, NULL dereferences, crashes, or | ||
| CVE-2023-48795 | Med | 5.9 | < 0.9.6-13.el8_9 | 0.9.6-13.el8_9 | Dec 18, 2023 | The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote attackers to bypass integrity checks such that some packets are omitted (from the extension negotiation message), and a client and server may consequently end | |
| CVE-2023-2283 | — | < 0.9.6-10.el8_8 | 0.9.6-10.el8_8 | May 26, 2023 | A vulnerability was found in libssh, where the authentication check of the connecting client can be bypassed in the`pki_verify_data_signature` function in memory allocation problems. This issue may happen if there is insufficient memory or the memory usage is limited. The problem | ||
| CVE-2023-1667 | — | < 0.9.6-10.el8_8 | 0.9.6-10.el8_8 | May 26, 2023 | A NULL pointer dereference was found In libssh during re-keying with algorithm guessing. This issue may allow an authenticated client to cause a denial of service. | ||
| CVE-2021-3634 | — | < 0.9.6-3.el8 | 0.9.6-3.el8 | Aug 31, 2021 | A flaw has been found in libssh in versions prior to 0.9.6. The SSH protocol keeps track of two shared secrets during the lifetime of the session. One of them is called secret_hash and the other session_id. Initially, both of them are the same, but after key re-exchange, previous |
- affected < 0.12.0-2.el10fixed 0.12.0-2.el10
A flaw was found in libssh in which a malicious SFTP (SSH File Transfer Protocol) server can exploit this by sending a malformed 'longname' field within an `SSH_FXP_NAME` message during a file listing operation. This missing null check can lead to reading beyond allocated memory
- affected < 0.12.0-2.el10fixed 0.12.0-2.el10
A flaw was found in libssh. A remote attacker, by controlling client configuration files or known_hosts files, could craft specific hostnames that when processed by the `match_pattern()` function can lead to inefficient regular expression backtracking. This can cause timeouts and
- affected < 0.12.0-2.el10fixed 0.12.0-2.el10
A flaw was found in libssh. The API function `ssh_get_hexa()` is vulnerable to a denial of service when processing zero-length input. This can be exploited remotely by an attacker during GSSAPI (Generic Security Service Application Program Interface) authentication if the server'
- affected < 0.12.0-2.el10fixed 0.12.0-2.el10
A flaw was found in libssh where it can attempt to open arbitrary files during configuration parsing. A local attacker can exploit this by providing a malicious configuration file or when the system is misconfigured. This vulnerability could lead to a Denial of Service (DoS) by c
- affected < 0.12.0-2.el10fixed 0.12.0-2.el10
A malicious SCP server can send unexpected paths that could make the client application override local files outside of working directory. This could be misused to create malicious executable or configuration files and make the user execute them under specific consequences. This
- affected < 0.10.4-18.el9fixed 0.10.4-18.el9
A flaw was found in libssh's handling of key exchange (KEX) processes when a client repeatedly sends incorrect KEX guesses. The library fails to free memory during these rekey operations, which can gradually exhaust system memory. This issue can lead to crashes on the client side
- affected < 0.10.4-18.el9fixed 0.10.4-18.el9
There's a vulnerability in the libssh package where when a libssh consumer passes in an unexpectedly large input buffer to ssh_get_fingerprint_hash() function. In such cases the bin_to_base64() function can experience an integer overflow leading to a memory under allocation, when
- affected < 0.10.4-18.el9fixed 0.10.4-18.el9
A flaw was found in libssh, a library that implements the SSH protocol. When calculating the session ID during the key exchange (KEX) process, an allocation failure in cryptographic functions may lead to a NULL pointer dereference. This issue can cause the client or server to cra
- affected < 0.10.4-18.el9fixed 0.10.4-18.el9
A vulnerability was found in libssh, where an uninitialized variable exists under certain conditions in the privatekey_from_file() function. This flaw can be triggered if the file specified by the filename doesn't exist and may lead to possible signing failures or heap corruption
- CVE-2025-5987Jul 7, 2025affected < 0.10.4-17.el9_7fixed 0.10.4-17.el9_7
A flaw was found in libssh when using the ChaCha20 cipher with the OpenSSL library. If an attacker manages to exhaust the heap space, this error is not detected and may lead to libssh using a partially initialized cipher context. This occurs because the OpenSSL error code returne
- affected < 0.10.4-18.el9fixed 0.10.4-18.el9
A flaw was found in the key export functionality of libssh. The issue occurs in the internal function responsible for converting cryptographic keys into serialized formats. During error handling, a memory structure is freed but not cleared, leading to a potential double free issu
- affected < 0.9.6-16.el8_10fixed 0.9.6-16.el8_10
A flaw was found in libssh versions built with OpenSSL versions older than 3.0, specifically in the ssh_kdf() function responsible for key derivation. Due to inconsistent interpretation of return values where OpenSSL uses 0 to indicate failure and libssh uses 0 for success—the fu
- CVE-2025-5318Jun 24, 2025affected < 0.11.1-4.el10_0fixed 0.11.1-4.el10_0
A flaw was found in the libssh library in versions less than 0.11.2. An out-of-bounds read can be triggered in the sftp_handle function due to an incorrect comparison check that permits the function to access memory beyond the valid handle list and to return an invalid pointer, w
- CVE-2023-6004Jan 3, 2024affected < 0.10.4-13.el9fixed 0.10.4-13.el9
A flaw was found in libssh. By utilizing the ProxyCommand or ProxyJump feature, users can exploit unchecked hostname syntax on the client. This issue may allow an attacker to inject malicious code into the command of the features mentioned through the hostname parameter.
- CVE-2023-6918Dec 18, 2023affected < 0.10.4-13.el9fixed 0.10.4-13.el9
A flaw was found in the libssh implements abstract layer for message digest (MD) operations implemented by different supported crypto backends. The return values from these were not properly checked, which could cause low-memory situations failures, NULL dereferences, crashes, or
- affected < 0.9.6-13.el8_9fixed 0.9.6-13.el8_9
The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote attackers to bypass integrity checks such that some packets are omitted (from the extension negotiation message), and a client and server may consequently end
- CVE-2023-2283May 26, 2023affected < 0.9.6-10.el8_8fixed 0.9.6-10.el8_8
A vulnerability was found in libssh, where the authentication check of the connecting client can be bypassed in the`pki_verify_data_signature` function in memory allocation problems. This issue may happen if there is insufficient memory or the memory usage is limited. The problem
- CVE-2023-1667May 26, 2023affected < 0.9.6-10.el8_8fixed 0.9.6-10.el8_8
A NULL pointer dereference was found In libssh during re-keying with algorithm guessing. This issue may allow an authenticated client to cause a denial of service.
- CVE-2021-3634Aug 31, 2021affected < 0.9.6-3.el8fixed 0.9.6-3.el8
A flaw has been found in libssh in versions prior to 0.9.6. The SSH protocol keeps track of two shared secrets during the lifetime of the session. One of them is called secret_hash and the other session_id. Initially, both of them are the same, but after key re-exchange, previous