CVE-2019-17498: Integer Overflow
First published: Mon Oct 21 2019(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| libssh2 | <=1.9.0 | |
| Fedoraproject Fedora | =30 | |
| Fedoraproject Fedora | =31 | |
| openSUSE | =15.1 | |
| Debian GNU/Linux | =8.0 | |
| Debian GNU/Linux | =9.0 | |
| NetApp Active IQ Unified Manager for VMware vSphere | ||
| NetApp Element Software | ||
| netapp hci management node | ||
| NetApp ONTAP Select Deploy | ||
| netapp solidfire | ||
| netapp bootstrap os | ||
| netapp hci compute node |
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2019-11/msg00026.html
- http://packetstormsecurity.com/files/172835/libssh2-1.9.0-Out-Of-Bounds-Read.html
- https://blog.semmle.com/libssh2-integer-overflow-CVE-2019-17498/
- 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://github.com/libssh2/libssh2/commit/dedcbd106f8e52d5586b0205bc7677e4c9868f9c
- https://lists.debian.org/debian-lts-announce/2019/11/msg00010.html
- https://lists.debian.org/debian-lts-announce/2021/12/msg00013.html
- https://lists.debian.org/debian-lts-announce/2023/09/msg00006.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/
- https://security.netapp.com/advisory/ntap-20220909-0004/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TY7EEE34RFKCTXTMBQQWWSLXZWSCXNDB/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22H4Q5XMGS3QNSA7OCL3U7UQZ4NXMR5O/
Frequently Asked Questions
What is the vulnerability ID for this vulnerability?
The vulnerability ID for this vulnerability is CVE-2019-17498.
What is the severity of CVE-2019-17498?
The severity of CVE-2019-17498 is high with a severity value of 8.1.
Which software versions are affected by CVE-2019-17498?
Libssh2 versions up to and including 1.9.0 are affected by CVE-2019-17498.
How does this vulnerability work?
This vulnerability is caused by an integer overflow in the SSH_MSG_DISCONNECT logic, allowing an attacker to specify an arbitrary offset for a memory read.
What is the potential impact of CVE-2019-17498?
A crafted SSH server may be able to disclose sensitive information or cause a denial-of-service condition.
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