Description
OpenSSH 7.7 through 7.9 and 8.x before 8.1, when compiled with an experimental key type, has a pre-authentication integer overflow if a client or server is configured to use a crafted XMSS key. This leads to memory corruption and local code execution because of an error in the XMSS key parsing algorithm. NOTE: the XMSS implementation is considered experimental in all released OpenSSH versions, and there is no supported way to enable it when building portable OpenSSH.
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a | n/a |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | >= V3.1.0, < V3.1.5 |
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP | >= V3.1.0, < V3.1.5 |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | >= V3.1.0, < V3.1.5 |
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP | >= V3.1.0, < V3.1.5 |
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP | >= V3.1.0, < V3.1.5 |
References
- https://bugzilla.suse.com/show_bug.cgi?id=1153537Issue Tracking, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdfThird Party Advisory
- https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/sshkey-xmss.cRelease Notes, Vendor Advisory
- https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/sshkey-xmss.c.diff?r1=1.5&r2=1.6&f=hPatch
- https://security.gentoo.org/glsa/201911-01Third Party Advisory
- https://security.netapp.com/advisory/ntap-20191024-0003/Third Party Advisory
- https://ssd-disclosure.com/archives/4033/ssd-advisory-openssh-pre-auth-xmss-integer-overflowExploit, Third Party Advisory
- https://www.openssh.com/releasenotes.htmlRelease Notes
- https://www.openwall.com/lists/oss-security/2019/10/09/1Mailing List, Third Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1153537Issue Tracking, Third Party Advisory
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdfThird Party Advisory
- https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/sshkey-xmss.cRelease Notes, Vendor Advisory
- https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/sshkey-xmss.c.diff?r1=1.5&r2=1.6&f=hPatch
- https://security.gentoo.org/glsa/201911-01Third Party Advisory
- https://security.netapp.com/advisory/ntap-20191024-0003/Third Party Advisory
- https://ssd-disclosure.com/archives/4033/ssd-advisory-openssh-pre-auth-xmss-integer-overflowExploit, Third Party Advisory
- https://www.openssh.com/releasenotes.htmlRelease Notes
- https://www.openwall.com/lists/oss-security/2019/10/09/1Mailing List, Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html
- https://cert-portal.siemens.com/productcert/html/ssa-412672.html
Timeline
- Published
- Oct 9, 2019
- Last modified
- Oct 14, 2026
- NVD status
- Modified