| Description: | Summary:
The remote host is missing an update for the 'libssh2' package(s) announced via the USN-5308-1 advisory.
Vulnerability Insight:
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)
It was discovered that libssh2 incorrectly handled interactive response
messages length. A remote attacker could possibly use this issue to execute
arbitrary code. (CVE-2019-3863)
It was discovered that libssh2 incorrectly handled the Diffie Hellman key
exchange. A remote attacker could possibly use this issue to cause a denial
of service or obtain sensitive information. (CVE-2019-13115)
It was discovered that libssh2 incorrectly handled bound checks in
SSH_MSG_DISCONNECT. A remote attacker could possibly use this issue to
cause a denial of service or obtain sensitive information. (CVE-2019-17498)
Affected Software/OS:
'libssh2' package(s) on Ubuntu 16.04.
Solution:
Please install the updated package(s).
CVSS Score:
9.3
CVSS Vector:
AV:N/AC:M/Au:N/C:C/I:C/A:C
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