National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2019-17498 Detail

Current Description

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.

Source:  MITRE
View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score: 8.1 HIGH
Vector:  CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00026.html
https://blog.semmle.com/libssh2-integer-overflow-CVE-2019-17498/ Exploit Third Party Advisory
https://github.com/kevinbackhouse/SecurityExploits/tree/8cbdbbe6363510f7d9ceec685373da12e6fc752d/libssh2/out_of_bounds_read_disconnect_CVE-2019-17498 Exploit Third Party Advisory
https://github.com/libssh2/libssh2/blob/42d37aa63129a1b2644bf6495198923534322d64/src/packet.c#L480 Exploit Third Party Advisory
https://github.com/libssh2/libssh2/pull/402/commits/1c6fa92b77e34d089493fe6d3e2c6c8775858b94 Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/11/msg00010.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/22H4Q5XMGS3QNSA7OCL3U7UQZ4NXMR5O/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TY7EEE34RFKCTXTMBQQWWSLXZWSCXNDB/

Weakness Enumeration

CWE-ID CWE Name Source
CWE-190 Integer Overflow or Wraparound NIST  

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:libssh2:libssh2:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (including)
1.9.0


Change History

5 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-17498
NVD Published Date:
10/21/2019
NVD Last Modified:
11/06/2019