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Fencer Vulns
high 8.1

CVE-2020-8625 in the critical feed json

A vulnerability in BIND's GSSAPI security policy negotiation can be targeted by a buffer overflow attack

published 2021-02-17 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-29473

cvss
8.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
64.2%
EPSS 64.2% chance of exploitation in 30 days, percentile 99.2%
public exploits
0
none known

Summary

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

Patch / fix

  • siemens sinec_infrastructure_network_services 1.0.1.1
  • bind9 Debian 14, Debian 13, Debian 12 1:9.16.12-1

debian advisories DEBIAN-CVE-2020-8625

  • bind9 Ubuntu 16.04 LTS 1:9.10.3.dfsg.P4-8ubuntu1.18
  • bind9 Ubuntu 18.04 LTS 1:9.11.3+dfsg-1ubuntu1.14
  • bind9 Ubuntu 20.04 LTS 1:9.16.1-0ubuntu2.6
  • bind9 Ubuntu Pro 14.04 LTS 1:9.9.5.dfsg-3ubuntu0.19+esm4

ubuntu advisories UBUNTU-CVE-2020-8625

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • bind RHEL 7 32:9.11.4-26.P2.el7_9.4
  • bind-sdb RHEL 7 32:9.11.4-26.P2.el7_9.4
  • bind-libs RHEL 7 32:9.11.4-26.P2.el7_9.4
  • bind-utils RHEL 7 32:9.11.4-26.P2.el7_9.4
  • bind-chroot RHEL 7 32:9.11.4-26.P2.el7_9.4
  • bind-pkcs11 RHEL 7 32:9.11.4-26.P2.el7_9.4
  • bind-license RHEL 7 32:9.11.4-26.P2.el7_9.4
  • bind-libs-lite RHEL 7 32:9.11.4-26.P2.el7_9.4

red hat advisories RHSA-2021:0922RHSA-2021:0727RHSA-2021:0694RHSA-2021:0693RHSA-2021:0692RHSA-2021:0691

  • bind SLES for SAP 15 SP1, SLES for SAP 15, SLES 15-LTSS +12 more 9.16.6-12.41.1
  • bind SLES 11 SP4-LTSS, SLE Point of Sale 11 SP3 9.9.6P1-0.51.23.1
  • bind SLES for SAP 12 SP3, SLES for SAP 12 SP2, SLES 12 SP3-LTSS +7 more 9.9.9P1-63.20.1
  • bind SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +4 more 9.11.22-3.29.1

suse advisories SUSE-SU-2021:0507-1SUSE-SU-2021:14632-1SUSE-SU-2021:0504-1SUSE-SU-2021:0503-1

  • bind openSUSE Tumbleweed 9.16.20-1.4
  • bind openSUSE Leap 15.2 9.16.6-lp152.14.12.1

opensuse advisories openSUSE-SU-2024:10650-1openSUSE-SU-2021:0375-1

  • bind Alpine 3.24, Alpine 3.23, Alpine 3.22 +12 more 9.16.11-r2

alpine advisories ALPINE-CVE-2020-8625

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • bind Arch Linux 9.16.12-1

arch linux advisories AVG-1589

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-8625 updated cvss 8.1

bind: Buffer overflow in the SPNEGO implementation affecting GSSAPI security policy negotiation

  • Red Hat Enterprise Linux 5 bind97
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 8) bind 9.11.20-5.el8_3.1, bind-sdb 9.11.20-5.el8_3.1, bind-libs 9.11.20-5.el8_3.1, bind-utils 9.11.20-5.el8_3.1, bind-chroot 9.11.20-5.el8_3.1, bind-pkcs11 9.11.20-5.el8_3.1, +6 more
    fixed: vendor fix RHSA-2021:0670
  • Red Hat Enterprise Linux AppStream EUS (v. 8.1) bind 9.11.4-26.P2.el8_1.4, bind-sdb 9.11.4-26.P2.el8_1.4, bind-libs 9.11.4-26.P2.el8_1.4, bind-utils 9.11.4-26.P2.el8_1.4, bind-chroot 9.11.4-26.P2.el8_1.4, bind-pkcs11 9.11.4-26.P2.el8_1.4, +6 more
    fixed: vendor fix RHSA-2021:0669
  • Red Hat Enterprise Linux AppStream EUS (v. 8.2) bind 9.11.13-6.el8_2.2, bind-sdb 9.11.13-6.el8_2.2, bind-libs 9.11.13-6.el8_2.2, bind-utils 9.11.13-6.el8_2.2, bind-chroot 9.11.13-6.el8_2.2, bind-pkcs11 9.11.13-6.el8_2.2, +6 more
    fixed: vendor fix RHSA-2021:0922
  • Red Hat Enterprise Linux BaseOS (v. 8) bind 9.11.20-5.el8_3.1, bind-export-libs 9.11.20-5.el8_3.1
    fixed: vendor fix RHSA-2021:0670
  • Red Hat Enterprise Linux BaseOS EUS (v. 8.1) bind 9.11.4-26.P2.el8_1.4, bind-export-libs 9.11.4-26.P2.el8_1.4
    fixed: vendor fix RHSA-2021:0669
  • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) bind 9.11.13-6.el8_2.2, bind-export-libs 9.11.13-6.el8_2.2
    fixed: vendor fix RHSA-2021:0922
  • Red Hat Enterprise Linux Client (v. 7) bind 9.11.4-26.P2.el7_9.4, bind-libs 9.11.4-26.P2.el7_9.4, bind-utils 9.11.4-26.P2.el7_9.4, bind-license 9.11.4-26.P2.el7_9.4, bind-libs-lite 9.11.4-26.P2.el7_9.4, bind-export-libs 9.11.4-26.P2.el7_9.4 Red Hat Enterprise Linux Client Optional (v. 7) bind 9.11.4-26.P2.el7_9.4, bind-sdb 9.11.4-26.P2.el7_9.4, bind-chroot 9.11.4-26.P2.el7_9.4, bind-pkcs11 9.11.4-26.P2.el7_9.4, bind-sdb-chroot 9.11.4-26.P2.el7_9.4, bind-pkcs11-libs 9.11.4-26.P2.el7_9.4, +1 more
    fixed: vendor fix RHSA-2021:0671
show 23 more
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) bind 9.9.4-74.el7_6.6, bind-libs 9.9.4-74.el7_6.6, bind-utils 9.9.4-74.el7_6.6, bind-license 9.9.4-74.el7_6.6, bind-libs-lite 9.9.4-74.el7_6.6
    fixed: vendor fix RHSA-2021:0691
  • Red Hat Enterprise Linux ComputeNode EUS (v. 7.7) bind 9.11.4-9.P2.el7_7.4, bind-libs 9.11.4-9.P2.el7_7.4, bind-utils 9.11.4-9.P2.el7_7.4, bind-license 9.11.4-9.P2.el7_7.4, bind-libs-lite 9.11.4-9.P2.el7_7.4, bind-export-libs 9.11.4-9.P2.el7_7.4
    fixed: vendor fix RHSA-2021:0727
  • Red Hat Enterprise Linux ComputeNode Optional (v. 7) bind 9.11.4-26.P2.el7_9.4, bind-sdb 9.11.4-26.P2.el7_9.4, bind-chroot 9.11.4-26.P2.el7_9.4, bind-pkcs11 9.11.4-26.P2.el7_9.4, bind-sdb-chroot 9.11.4-26.P2.el7_9.4, bind-pkcs11-libs 9.11.4-26.P2.el7_9.4, +1 more
    fixed: vendor fix RHSA-2021:0671
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) bind 9.9.4-74.el7_6.6, bind-sdb 9.9.4-74.el7_6.6, bind-chroot 9.9.4-74.el7_6.6, bind-pkcs11 9.9.4-74.el7_6.6, bind-sdb-chroot 9.9.4-74.el7_6.6, bind-pkcs11-libs 9.9.4-74.el7_6.6, +1 more
    fixed: vendor fix RHSA-2021:0691
  • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.7) bind 9.11.4-9.P2.el7_7.4, bind-sdb 9.11.4-9.P2.el7_7.4, bind-chroot 9.11.4-9.P2.el7_7.4, bind-pkcs11 9.11.4-9.P2.el7_7.4, bind-sdb-chroot 9.11.4-9.P2.el7_7.4, bind-pkcs11-libs 9.11.4-9.P2.el7_7.4, +1 more
    fixed: vendor fix RHSA-2021:0727
  • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) bind 9.9.4-74.el7_6.6, bind-libs 9.9.4-74.el7_6.6, bind-utils 9.9.4-74.el7_6.6, bind-chroot 9.9.4-74.el7_6.6, bind-pkcs11 9.9.4-74.el7_6.6, bind-license 9.9.4-74.el7_6.6, +3 more Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) bind-sdb 9.9.4-74.el7_6.6, bind-pkcs11 9.9.4-74.el7_6.6, bind-sdb-chroot 9.9.4-74.el7_6.6, bind-pkcs11-libs 9.9.4-74.el7_6.6, bind-pkcs11-utils 9.9.4-74.el7_6.6
    fixed: vendor fix RHSA-2021:0691
  • Red Hat Enterprise Linux Server (v. 6 ELS) bind 9.8.2-0.68.rc1.el6_10.10, bind-libs 9.8.2-0.68.rc1.el6_10.10, bind-utils 9.8.2-0.68.rc1.el6_10.10, bind-chroot 9.8.2-0.68.rc1.el6_10.10
    fixed: vendor fix RHSA-2021:0672
  • Red Hat Enterprise Linux Server (v. 7) bind 9.11.4-26.P2.el7_9.4, bind-libs 9.11.4-26.P2.el7_9.4, bind-utils 9.11.4-26.P2.el7_9.4, bind-chroot 9.11.4-26.P2.el7_9.4, bind-pkcs11 9.11.4-26.P2.el7_9.4, bind-license 9.11.4-26.P2.el7_9.4, +4 more
    fixed: vendor fix RHSA-2021:0671
  • Red Hat Enterprise Linux Server AUS (v. 7.2) bind 9.9.4-29.el7_2.10, bind-libs 9.9.4-29.el7_2.10, bind-utils 9.9.4-29.el7_2.10, bind-chroot 9.9.4-29.el7_2.10, bind-pkcs11 9.9.4-29.el7_2.10, bind-license 9.9.4-29.el7_2.10, +3 more
    fixed: vendor fix RHSA-2021:0694
  • Red Hat Enterprise Linux Server AUS (v. 7.3) bind 9.9.4-50.el7_3.5, bind-libs 9.9.4-50.el7_3.5, bind-utils 9.9.4-50.el7_3.5, bind-chroot 9.9.4-50.el7_3.5, bind-pkcs11 9.9.4-50.el7_3.5, bind-license 9.9.4-50.el7_3.5, +3 more
    fixed: vendor fix RHSA-2021:0693
  • Red Hat Enterprise Linux Server AUS (v. 7.4) bind 9.9.4-51.el7_4.5, bind-libs 9.9.4-51.el7_4.5, bind-utils 9.9.4-51.el7_4.5, bind-chroot 9.9.4-51.el7_4.5, bind-pkcs11 9.9.4-51.el7_4.5, bind-license 9.9.4-51.el7_4.5, +3 more Red Hat Enterprise Linux Server E4S (v. 7.4) bind 9.9.4-51.el7_4.5, bind-libs 9.9.4-51.el7_4.5, bind-utils 9.9.4-51.el7_4.5, bind-chroot 9.9.4-51.el7_4.5, bind-pkcs11 9.9.4-51.el7_4.5, bind-license 9.9.4-51.el7_4.5, +3 more
    fixed: vendor fix RHSA-2021:0692
  • Red Hat Enterprise Linux Server EUS (v. 7.6) bind 9.9.4-74.el7_6.6, bind-libs 9.9.4-74.el7_6.6, bind-utils 9.9.4-74.el7_6.6, bind-chroot 9.9.4-74.el7_6.6, bind-pkcs11 9.9.4-74.el7_6.6, bind-license 9.9.4-74.el7_6.6, +3 more
    fixed: vendor fix RHSA-2021:0691
  • Red Hat Enterprise Linux Server EUS (v. 7.7) bind 9.11.4-9.P2.el7_7.4, bind-libs 9.11.4-9.P2.el7_7.4, bind-utils 9.11.4-9.P2.el7_7.4, bind-chroot 9.11.4-9.P2.el7_7.4, bind-pkcs11 9.11.4-9.P2.el7_7.4, bind-license 9.11.4-9.P2.el7_7.4, +4 more
    fixed: vendor fix RHSA-2021:0727
  • Red Hat Enterprise Linux Server Optional (v. 6 ELS) bind-sdb 9.8.2-0.68.rc1.el6_10.10
    fixed: vendor fix RHSA-2021:0672
  • Red Hat Enterprise Linux Server Optional (v. 7) bind-sdb 9.11.4-26.P2.el7_9.4, bind-sdb-chroot 9.11.4-26.P2.el7_9.4
    fixed: vendor fix RHSA-2021:0671
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.2) bind-sdb 9.9.4-29.el7_2.10, bind-sdb-chroot 9.9.4-29.el7_2.10
    fixed: vendor fix RHSA-2021:0694
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.3) bind-sdb 9.9.4-50.el7_3.5, bind-sdb-chroot 9.9.4-50.el7_3.5
    fixed: vendor fix RHSA-2021:0693
  • Red Hat Enterprise Linux Server Optional AUS (v. 7.4) bind-sdb 9.9.4-51.el7_4.5, bind-sdb-chroot 9.9.4-51.el7_4.5 Red Hat Enterprise Linux Server Optional E4S (v. 7.4) bind-sdb 9.9.4-51.el7_4.5, bind-sdb-chroot 9.9.4-51.el7_4.5
    fixed: vendor fix RHSA-2021:0692
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.6) bind-sdb 9.9.4-74.el7_6.6, bind-pkcs11 9.9.4-74.el7_6.6, bind-sdb-chroot 9.9.4-74.el7_6.6, bind-pkcs11-libs 9.9.4-74.el7_6.6, bind-pkcs11-utils 9.9.4-74.el7_6.6
    fixed: vendor fix RHSA-2021:0691
  • Red Hat Enterprise Linux Server Optional EUS (v. 7.7) bind-sdb 9.11.4-9.P2.el7_7.4, bind-sdb-chroot 9.11.4-9.P2.el7_7.4
    fixed: vendor fix RHSA-2021:0727
  • Red Hat Enterprise Linux Server Optional TUS (v. 7.4) bind-sdb 9.9.4-51.el7_4.5, bind-sdb-chroot 9.9.4-51.el7_4.5 Red Hat Enterprise Linux Server TUS (v. 7.4) bind 9.9.4-51.el7_4.5, bind-libs 9.9.4-51.el7_4.5, bind-utils 9.9.4-51.el7_4.5, bind-chroot 9.9.4-51.el7_4.5, bind-pkcs11 9.9.4-51.el7_4.5, bind-license 9.9.4-51.el7_4.5, +3 more
    fixed: vendor fix RHSA-2021:0692
  • Red Hat Enterprise Linux Workstation (v. 7) bind 9.11.4-26.P2.el7_9.4, bind-libs 9.11.4-26.P2.el7_9.4, bind-utils 9.11.4-26.P2.el7_9.4, bind-chroot 9.11.4-26.P2.el7_9.4, bind-pkcs11 9.11.4-26.P2.el7_9.4, bind-license 9.11.4-26.P2.el7_9.4, +4 more Red Hat Enterprise Linux Workstation Optional (v. 7) bind-sdb 9.11.4-26.P2.el7_9.4, bind-sdb-chroot 9.11.4-26.P2.el7_9.4
    fixed: vendor fix RHSA-2021:0671
  • Red Hat Enterprise Linux 5 bind
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

64.16% chance of exploitation in the next 30 days, higher than 99.2% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Affected products

  • ISC BIND9

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.