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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.8 HIGH
LOCAL
LOW
LOW
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
mitreCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 44%
VendorProductVersion
openbsdopenssh
7.7 ≤
𝑥
≤ 7.9
openbsdopenssh
8.0 ≤
𝑥
< 8.1
netappcloud_backup
-
netappsteelstore_cloud_integrated_storage
-
siemensscalance_x204rna_firmware
𝑥
< 3.2.7
siemensscalance_x204rna_ecc_firmware
𝑥
< 3.2.7
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
openssh
bullseye (security)
1:8.4p1-5+deb11u3
fixed
bullseye
1:8.4p1-5+deb11u3
fixed
stretch
not-affected
jessie
not-affected
bookworm
1:9.2p1-2+deb12u3
fixed
bookworm (security)
1:9.2p1-2+deb12u3
fixed
sid
1:9.9p1-3
fixed
trixie
1:9.9p1-3
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
openssh
disco
not-affected
bionic
not-affected
xenial
not-affected
trusty
not-affected
openssh-ssh1
disco
not-affected
bionic
not-affected
xenial
dne
trusty
dne