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CVE-2025-5372

Medium priority

Some fixes available 4 of 7

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...

1 affected package

libssh

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libssh Fixed Fixed Ignored Ignored
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CVE-2025-5351

Medium priority
Fixed

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...

1 affected package

libssh

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libssh Fixed Not affected Not affected Not affected
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CVE-2025-4878

Medium priority
Fixed

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...

1 affected package

libssh

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libssh Fixed Fixed Fixed Fixed
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CVE-2025-4877

Medium priority
Fixed

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...

1 affected package

libssh

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libssh Fixed Fixed Fixed Fixed
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CVE-2025-5318

Medium priority
Fixed

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...

1 affected package

libssh

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libssh Fixed Fixed Fixed Fixed
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CVE-2023-6004

Medium priority
Fixed

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...

1 affected package

libssh

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libssh Fixed Fixed Fixed
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CVE-2023-6918

Medium priority
Fixed

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...

1 affected package

libssh

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libssh Fixed Fixed Fixed
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CVE-2023-48795

Medium priority

Some fixes available 42 of 93

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...

13 affected packages

dropbear, golang-go.crypto, snapd, lxd, libssh...

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
dropbear Needs evaluation Fixed Fixed Fixed
golang-go.crypto Needs evaluation Needs evaluation Needs evaluation Needs evaluation
snapd Not affected Not affected Not affected Not affected
lxd Not in release Not in release Not affected Fixed
libssh Not affected Fixed Fixed Not affected
openssh-ssh1 Ignored Ignored Ignored Ignored
libssh2 Not affected Not affected Not affected Not affected
openssh Fixed Fixed Fixed Fixed
paramiko Fixed Fixed Fixed Needs evaluation
putty Needs evaluation Needs evaluation Needs evaluation Needs evaluation
proftpd-dfsg Not affected Not affected Fixed Needs evaluation
python-asyncssh Fixed Fixed Fixed Ignored
filezilla Fixed Fixed Fixed Not affected
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CVE-2020-22218

Medium priority
Fixed

An issue was discovered in function _libssh2_packet_add in libssh2 1.10.0 allows attackers to access out of bounds memory.

1 affected package

libssh2

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libssh2 Not affected Fixed Fixed
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CVE-2023-3603

Medium priority
Not affected

A missing allocation check in sftp server processing read requests may cause a NULL dereference on low-memory conditions. The malicious client can request up to 4GB SFTP reads, causing allocation of up to 4GB buffers, which was...

1 affected package

libssh

Package 24.04 LTS 22.04 LTS 20.04 LTS 18.04 LTS
libssh Not affected Not affected Not affected
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