CVE-2020-8620: canonical ubuntu_linux Reachable Assertion
CVSS: 7.5v3.1HighModified
AliasesALPINE-CVE-2020-8620UBUNTU-CVE-2020-8620DEBIAN-CVE-2020-8620CGA-c4gx-c9pc-wv8pCGA-r6m2-whxm-rrjc
Published 21-08-2020Last modified 17-09-2024
Vulnerability summary
CVE-2020-8620 is a high (CVSS 7.5) Reachable Assertion vulnerability in canonical ubuntu_linux. EPSS estimates a 3.69% chance of exploitation in the next 30 days, higher than 89.5% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (CVE.org)EPSS score
3.69%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 5 · Related 7Timeline
- 21-08-2020PublishedVulnerability first disclosed.
- 17-09-2024Last modifiedVulnerability information updated.
Description
In BIND 9.15.6 -> 9.16.5, 9.17.0 -> 9.17.3, An attacker who can establish a TCP connection with the server and send data on that connection can exploit this to trigger the assertion failure, causing the server to exit.
CVSS metrics
8 scores · 7 sources · 2 versionsHigh 7.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 7 agree
- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · WolfiEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · ChainguardEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
3.69%
Chance of exploitation in the next 30 days
Percentile
90%
Versus all other CVEs
30-day change
0.00 pp
From 3.69% on 18-09-2026
18-09-202618-10-2026
EPSS score3.69%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Isc2 products
Alpine1 product
- bind≥ 9.15.6, < 9.16.6-r0
Canonical1 product
- ubuntu_linuxEOL12.04 | 16.04 | 18.04
Chainguard1 product
- bindAll versions (No fix recorded)
Debian1 product
- bind9< 1:9.16.6-1
Netapp1 product
Opensuse1 product
- leapEOL15.1 | 15.2
Ubuntu1 product
- bind9< 1:9.16.1-0ubuntu2.3
Wolfi1 product
- bindAll versions (No fix recorded)
9 vendors · 10 products
References
13 links- lists.opensuse.org/opensuse-security-announce/2020-10/msg00041.htmlVendor AdvisoryX Refsource SUSEAdvisoryThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-10/msg00044.htmlVendor AdvisoryX Refsource SUSEAdvisoryThird Party Advisory
