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CVE-2019-17498
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…
High8.1EPSS 3.8%
- Published
- Updated
- Reserved
- Assigned by
- mitre
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High8.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 3.8% · top 9.9% of all CVEs (7 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.
Weakness
Affected products
n/a
- affected n/a
References (13)
- https://github.com/libssh2/libssh2/blob/42d37aa63129a1b2644bf6495198923534322d64/src/packet.c#L480 (opens in a new tab)x_transferred
- https://blog.semmle.com/libssh2-integer-overflow-CVE-2019-17498/ (opens in a new tab)x_transferred
- https://github.com/kevinbackhouse/SecurityExploits/tree/8cbdbbe6363510f7d9ceec685373da12e6fc752d/libssh2/out_of_bounds_read_disconnect_CVE-2019-17498 (opens in a new tab)x_transferred
- FEDORA-2019-91529f19e4 (opens in a new tab)vendor-advisoryx_transferred
- openSUSE-SU-2019:2483 (opens in a new tab)vendor-advisoryx_transferred
- [debian-lts-announce] 20191113 [SECURITY] [DLA 1991-1] libssh2 security update (opens in a new tab)mailing-listx_transferred
- FEDORA-2019-ec04c34768 (opens in a new tab)vendor-advisoryx_transferred
- https://github.com/libssh2/libssh2/commit/dedcbd106f8e52d5586b0205bc7677e4c9868f9c (opens in a new tab)x_transferred
- [debian-lts-announce] 20211217 [SECURITY] [DLA 2848-1] libssh2 security update (opens in a new tab)mailing-listx_transferred
- https://security.netapp.com/advisory/ntap-20220909-0004/ (opens in a new tab)x_transferred
- http://packetstormsecurity.com/files/172835/libssh2-1.9.0-Out-Of-Bounds-Read.html (opens in a new tab)x_transferred
- [debian-lts-announce] 20230908 [SECURITY] [DLA 3559-1] libssh2 security update (opens in a new tab)mailing-listx_transferred
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2019-17498)Record last updated .