CVE-2015-1853

chrony before 1.31.1 does not properly protect state variables in authenticated symmetric NTP associations, which allows remote attackers with knowledge of NTP peering to cause a denial of service (inability to synchronize) via random timestamps in crafted NTP data packets.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
6.5 MEDIUM
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
redhatCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 74%
VendorProductVersion
tuxfamilychrony
𝑥
< 1.31.1
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
chrony
bullseye
4.0-8+deb11u2
fixed
bookworm
4.3-2+deb12u1
fixed
sid
4.6.1-1
fixed
trixie
4.6.1-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
chrony
cosmic
not-affected
bionic
not-affected
artful
not-affected
zesty
ignored
yakkety
ignored
xenial
not-affected
wily
ignored
vivid
ignored
utopic
ignored
trusty
Fixed 1.29-1ubuntu0.1
released
precise
ignored
lucid
ignored
References
http://chrony.tuxfamily.org/News.html
https://security.gentoo.org/glsa/201507-01
http://chrony.tuxfamily.org/News.html
https://security.gentoo.org/glsa/201507-01