CVE-2019-3855

Affected: The libssh2 Project libssh2

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.

USN-5308-1 — libssh2 vulnerabilities

Affected: Ubuntu:Pro:16.04:LTS: libssh2

It was discovered that libssh2 mishandled certain input. If libssh2 were used to connect to a malicious or compromised SSH server, a remote, unauthenticated attacker could possibly execute arbitrary code on the client system. (CVE-2019-3855)

It was discovered that libssh2 incorrectly handled prompt requests. A remote attacker could possibly use this issue to execute arbitrary code. (CVE-2019-3856)

It was discovered that libssh2 incorrectly handled SSH_MSG_CHANNEL_REQUEST packets. A remote attacker could possibly use this issue to execute arbitrary code, cause a denial of service, or obtain sensitive information. (CVE-2019-3857, CVE-2019-3862)

It was discovered that libssh2 incorrectly handled specially crafted SFTP packets. A remote attacker could possibly use this issue to cause a denial of service or obtain sensitive information. (CVE-2019-3858)

It was discovered that libssh2 incorrectly handled certain specially crafted packets. A remote attacker could possibly use this issue to cause a denial of service or obtain sensitive information. (CVE-2019-3859)

It was discovered that libssh2 incorrectly handled SFTP packets with empty payloads. A remote attacker could possibly use this issue to cause a denial of service or obtain sensitive information. (CVE-2019-3860)

It was discovered that libssh2 incorrectly handled padding values in SSH packets. A remote attacker could possibly use this issue to cause a denial of service or obtain sensitive information. (CVE-2019-3861)…

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CVE-2019-3855

USN-5308-1 — libssh2 vulnerabilities