CVE-2015-2689

Tor before 0.2.4.26 and 0.2.5.x before 0.2.5.11 does not properly handle pending-connection resolve states during periods of high DNS load, which allows remote attackers to cause a denial of service (assertion failure and daemon exit) via crafted packets.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
debianCNA
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CVEADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 69%
VendorProductVersion
torprojecttor
𝑥
< 0.2.4.26
torprojecttor
0.2.5.1 ≤
𝑥
< 0.2.5.11
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
tor
bullseye (security)
0.4.5.16-1
fixed
bullseye
0.4.5.16-1
fixed
bookworm
0.4.7.16-1
fixed
bookworm (security)
0.4.7.16-1
fixed
sid
0.4.8.13-2
fixed
trixie
0.4.8.13-2
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
tor
zesty
not-affected
yakkety
not-affected
xenial
not-affected
wily
not-affected
vivid
Fixed 0.2.5.12-1build0.15.04.1
released
utopic
ignored
trusty
Fixed 0.2.4.27-1build0.14.04.1
released
precise
ignored
lucid
dne
Common Weakness Enumeration
References
https://lists.torproject.org/pipermail/tor-talk/2015-March/037281.html
https://trac.torproject.org/projects/tor/ticket/14129
https://lists.torproject.org/pipermail/tor-talk/2015-March/037281.html
https://trac.torproject.org/projects/tor/ticket/14129