What’s Vulnerable › Vulnerabilities

CVE-2019-17498

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2019-10-21 · updated 2026-10-14
• Weakness: CWE-190

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.

Affected products

• Debian Linux: 8.0, 9.0
• Fedoraproject Fedora: 30, 31
• libssh2: through 1.9.0
• Active IQ Unified Manager for VMware vSphere, Linux, and Microsoft Windows: all versions
• NetApp Bootstrap Os: all versions
• NetApp Element Software: all versions
• NetApp Hci Management Node: all versions
• NetApp ONTAP Select Deploy administration utility: all versions
• NetApp Solidfire: all versions
• openSUSE Leap: 15.1

References

• 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%40lists.fedoraproject.org/message/22H4Q5XMGS3QNSA7OCL3U7UQZ4NXMR5O/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TY7EEE34RFKCTXTMBQQWWSLXZWSCXNDB/
• https://security.netapp.com/advisory/ntap-20220909-0004/

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