CVE-2019-3857

libssh2: Integer overflow in SSH packet processing channel resulting in out of bounds write

Published Mar 25, 2019 CVSS 3.1 · 8.8 High EPSS 6.1% KEV · Not listed
Description
An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal 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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-1730-1 libssh2 security update
Debian DSA Debian DSA DSA-4431-1 libssh2 security update
EUVD EUVD EUVD-2019-13471 An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal 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.
Ubuntu USN Ubuntu USN USN-5308-1 libssh2 vulnerabilities
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}