CVE-2020-8621

In BIND 9.14.0 -> 9.16.5, 9.17.0 -> 9.17.3, If a server is configured with both QNAME minimization and 'forward first' then an attacker who can send queries to it may be able to trigger the condition that will cause the server to crash. Servers that 'forward only' are not affected.
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
iscCNA
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
CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 88%
VendorProductVersion
iscbind
9.14.0 ≤
𝑥
≤ 9.16.5
iscbind
9.17.0 ≤
𝑥
≤ 9.17.3
opensuseleap
15.1
opensuseleap
15.2
canonicalubuntu_linux
16.04
canonicalubuntu_linux
18.04
canonicalubuntu_linux
20.04
synologydns_server
𝑥
< 2.2.2-5027
netappsteelstore_cloud_integrated_storage
-
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
bind9
bullseye
1:9.16.50-1~deb11u2
fixed
buster
not-affected
stretch
not-affected
bullseye (security)
1:9.16.50-1~deb11u1
fixed
bookworm
1:9.18.28-1~deb12u2
fixed
bookworm (security)
1:9.18.28-1~deb12u2
fixed
sid
1:9.20.2-1
fixed
trixie
1:9.20.2-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
bind9
focal
Fixed 1:9.16.1-0ubuntu2.3
released
bionic
not-affected
xenial
not-affected
trusty
not-affected
Common Weakness Enumeration
References
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html
https://kb.isc.org/docs/cve-2020-8621
https://security.gentoo.org/glsa/202008-19
https://security.netapp.com/advisory/ntap-20200827-0003/
https://usn.ubuntu.com/4468-1/
https://www.synology.com/security/advisory/Synology_SA_20_19
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.html
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.html
https://kb.isc.org/docs/cve-2020-8621
https://security.gentoo.org/glsa/202008-19
https://security.netapp.com/advisory/ntap-20200827-0003/
https://usn.ubuntu.com/4468-1/
https://www.synology.com/security/advisory/Synology_SA_20_19