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  • Keyword (text search): cpe:2.3:a:libssh2:libssh2:0.12:*:*:*:*:*:*:*
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There are 11 matching records.
Displaying matches 1 through 11.
Vuln ID Summary CVSS Severity
CVE-2019-17498

In libssh2 v1.9.0 and earlier versions, the SSH_MSG_DISCONNECT logic in packet.c has an integer overflow in a bounds check, enabling an attacker to specify an arbitrary (out-of-bounds) offset for a subsequent memory read. A crafted SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server.

Published: October 21, 2019; 6:15:10 PM -0400
V3.1: 8.1 HIGH
V2.0: 5.8 MEDIUM
CVE-2019-13115

In libssh2 before 1.9.0, kex_method_diffie_hellman_group_exchange_sha256_key_exchange in kex.c has an integer overflow that could lead to an out-of-bounds read in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to disclose sensitive information or cause a denial of service condition on the client system when a user connects to the server. This is related to an _libssh2_check_length mistake, and is different from the various issues fixed in 1.8.1, such as CVE-2019-3855.

Published: July 16, 2019; 2:15:13 PM -0400
V3.0: 8.1 HIGH
V2.0: 5.8 MEDIUM
CVE-2019-3860

An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SFTP packets with empty payloads are parsed. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.

Published: March 25, 2019; 3:29:01 PM -0400
V3.0: 9.1 CRITICAL
V2.0: 6.4 MEDIUM
CVE-2019-3856

An integer overflow flaw, which could lead to an out of bounds write, was discovered in libssh2 before 1.8.1 in the way keyboard prompt requests are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.

Published: March 25, 2019; 3:29:01 PM -0400
V3.1: 8.8 HIGH
V2.0: 6.8 MEDIUM
CVE-2019-3863

A flaw was found in libssh2 before 1.8.1. A server could send a multiple keyboard interactive response messages whose total length are greater than unsigned char max characters. This value is used as an index to copy memory causing in an out of bounds memory write error.

Published: March 25, 2019; 2:29:01 PM -0400
V3.0: 8.8 HIGH
V2.0: 6.8 MEDIUM
CVE-2019-3858

An out of bounds read flaw was discovered in libssh2 before 1.8.1 when a specially crafted SFTP packet is received from the server. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.

Published: March 21, 2019; 5:29:00 PM -0400
V3.0: 9.1 CRITICAL
V2.0: 6.4 MEDIUM
CVE-2019-3855

An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.

Published: March 21, 2019; 5:29:00 PM -0400
V3.1: 8.8 HIGH
V2.0: 9.3 HIGH
CVE-2019-3862

An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit status message and no payload are parsed. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.

Published: March 21, 2019; 12:01:04 PM -0400
V3.0: 9.1 CRITICAL
V2.0: 6.4 MEDIUM
CVE-2019-3859

An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the _libssh2_packet_require and _libssh2_packet_requirev functions. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.

Published: March 21, 2019; 12:01:04 PM -0400
V3.0: 9.1 CRITICAL
V2.0: 6.4 MEDIUM
CVE-2016-0787

The diffie_hellman_sha256 function in kex.c in libssh2 before 1.7.0 improperly truncates secrets to 128 or 256 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a "bits/bytes confusion bug."

Published: April 13, 2016; 1:59:10 PM -0400
V3.0: 5.9 MEDIUM
V2.0: 4.3 MEDIUM
CVE-2015-1782

The kex_agree_methods function in libssh2 before 1.5.0 allows remote servers to cause a denial of service (crash) or have other unspecified impact via crafted length values in an SSH_MSG_KEXINIT packet.

Published: March 13, 2015; 10:59:00 AM -0400
V3.x:(not available)
V2.0: 6.8 MEDIUM