Vulnerability Details CVE-2019-16905
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 44.6%
CVSS Severity
CVSS v3 Score 7.8
CVSS v2 Score 4.4
References
- https://bugzilla.suse.com/show_bug.cgi?id=1153537
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/sshkey-xmss.c
- https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/sshkey-xmss.c.diff?r1=1.5&r2=1.6&f=h
- https://security.gentoo.org/glsa/201911-01
- https://security.netapp.com/advisory/ntap-20191024-0003/
- https://ssd-disclosure.com/archives/4033/ssd-advisory-openssh-pre-auth-xmss-integer-overflow
- https://www.openssh.com/releasenotes.html
- https://www.openwall.com/lists/oss-security/2019/10/09/1
- https://bugzilla.suse.com/show_bug.cgi?id=1153537
- https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf
- https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/sshkey-xmss.c
- https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.bin/ssh/sshkey-xmss.c.diff?r1=1.5&r2=1.6&f=h
- https://security.gentoo.org/glsa/201911-01
- https://security.netapp.com/advisory/ntap-20191024-0003/
- https://ssd-disclosure.com/archives/4033/ssd-advisory-openssh-pre-auth-xmss-integer-overflow
- https://www.openssh.com/releasenotes.html
- https://www.openwall.com/lists/oss-security/2019/10/09/1
Products affected by CVE-2019-16905
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cpe:2.3:a:netapp:cloud_backup:-
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cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-
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cpe:2.3:a:openbsd:openssh:7.7
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cpe:2.3:a:openbsd:openssh:7.8
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cpe:2.3:a:openbsd:openssh:7.9
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cpe:2.3:a:openbsd:openssh:8.0
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cpe:2.3:h:siemens:scalance_x204rna:-
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cpe:2.3:h:siemens:scalance_x204rna_ecc:-
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cpe:2.3:o:siemens:scalance_x204rna_ecc_firmware:-
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cpe:2.3:o:siemens:scalance_x204rna_firmware:-