CVE-2019-17498

Summary:

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.

Reference Links(if available):

https://github.com/kevinbackhouse/SecurityExploits/tree/8cbdbbe6363510f7d9ceec685373da12e6fc752d/libssh2/out_of_bounds_read_disconnect_CVE-2019-17498

https://github.com/libssh2/libssh2/blob/42d37aa63129a1b2644bf6495198923534322d64/src/packet.c#L480

https://blog.semmle.com/libssh2-integer-overflow-CVE-2019-17498/

https://lists.fedoraproject.org/archives/list/[email protected]/message/TY7EEE34RFKCTXTMBQQWWSLXZWSCXNDB/

http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00026.html

CVSS Score (if available)

v2: / MEDIUMAV:N/AC:M/Au:N/C:P/I:N/A:P

v3: / HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Links to Exploits(if available)