HOMEVULNERABILITIESCVE-2020-8625
HIGH

CVE-2020-8625

CWE-120Published: February 17, 2021· Updated: Jun 17, 2026

8.1
CVSS v3.1

Official Description

BIND servers are vulnerable if they are running an affected version and are configured to use GSS-TSIG features. In a configuration which uses BIND's default settings the vulnerable code path is not exposed, but a server can be rendered vulnerable by explicitly setting valid values for the tkey-gssapi-keytab or tkey-gssapi-credentialconfiguration options. Although the default configuration is not vulnerable, GSS-TSIG is frequently used in networks where BIND is integrated with Samba, as well as in mixed-server environments that combine BIND servers with Active Directory domain controllers. The most likely outcome of a successful exploitation of the vulnerability is a crash of the named process. However, remote code execution, while unproven, is theoretically possible. Affects: BIND 9.5.0 -> 9.11.27, 9.12.0 -> 9.16.11, and versions BIND 9.11.3-S1 -> 9.11.27-S1 and 9.16.8-S1 -> 9.16.11-S1 of BIND Supported Preview Edition. Also release versions 9.17.0 -> 9.17.1 of the BIND 9.17 development branch

NVD Source

Technical Analysis

CVE-2020-8625 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.1.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Vendors & Products

Debian1 product(s)
debian linux
Fedora1 product(s)
fedora
isc1 product(s)
bind
netapp5 product(s)
cloud backupa250 firmwarea250500f firmware500f
siemens1 product(s)
sinec infrastructure network services
Source: NVD CPE · 23 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttp://www.openwall.com/lists/oss-security/2021/02/19/1
PATCHhttp://www.openwall.com/lists/oss-security/2021/02/20/2
PATCHhttps://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
PATCHhttp://www.openwall.com/lists/oss-security/2021/02/19/1
PATCHhttp://www.openwall.com/lists/oss-security/2021/02/20/2
PATCHhttps://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf
ADVISORYhttps://kb.isc.org/v1/docs/cve-2020-8625
ADVISORYhttps://lists.debian.org/debian-lts-announce/2021/02/msg00029.html
ADVISORYhttps://security.netapp.com/advisory/ntap-20210319-0001/
ADVISORYhttps://www.debian.org/security/2021/dsa-4857
ADVISORYhttps://www.zerodayinitiative.com/advisories/ZDI-21-195/
ADVISORYhttps://kb.isc.org/v1/docs/cve-2020-8625
ADVISORYhttps://lists.debian.org/debian-lts-announce/2021/02/msg00029.html
ADVISORYhttps://security.netapp.com/advisory/ntap-20210319-0001/
ADVISORYhttps://www.debian.org/security/2021/dsa-4857
ADVISORYhttps://www.zerodayinitiative.com/advisories/ZDI-21-195/

All References (22)

→
http://www.openwall.com/lists/oss-security/2021/02/19/1Mailing List · Patch · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2021/02/20/2Mailing List · Patch · Third Party Advisory
→
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch · Third Party Advisory
→
https://kb.isc.org/v1/docs/cve-2020-8625Mitigation · Vendor Advisory
→
https://lists.debian.org/debian-lts-announce/2021/02/msg00029.htmlMailing List · Third Party Advisory
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EBTPWRQWRQEJNWY4NHO4WLS4KLJ3ERHZ/
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KYXAF7G45RXDVNUTWWCI2CVTHRZ67LST/
→
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QWCMBOSZOJIIET7BWTRYS3HLX5TSDKHX/
→
https://security.netapp.com/advisory/ntap-20210319-0001/Third Party Advisory
→
https://www.debian.org/security/2021/dsa-4857Third Party Advisory
→
https://www.zerodayinitiative.com/advisories/ZDI-21-195/Third Party Advisory · VDB Entry
→
http://www.openwall.com/lists/oss-security/2021/02/19/1Mailing List · Patch · Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2021/02/20/2Mailing List · Patch · Third Party Advisory
→
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch · Third Party Advisory
→
https://kb.isc.org/v1/docs/cve-2020-8625Mitigation · Vendor Advisory

Quick Facts

CVE IDCVE-2020-8625
CVSS Score8.1 / 10
SeverityHIGH
WeaknessCWE-120
CISA KEVNo
Affected5 vendor(s)
PublishedFeb 17, 2021

Related CVEs (CWE-120)

CVE-2008-3496
10.0
CVE-2015-5093
10.0
CVE-2010-10016
10.0
CVE-2012-10035
10.0
CVE-2025-9962
10.0
CVE-2017-16740
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-8625 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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