# CVE-2020-8625: A vulnerability in BIND's GSSAPI security policy negotiation can be targeted by a buffer overflow attack > Attackers can cause a crash or potentially execute code in BIND servers configured with GSS-TSIG, requiring specific non-default settings. - **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 17 Feb 2021 - **Updated:** 16 Sep 2024 - **Also known as:** ALPINE-CVE-2020-8625, CLSA-2021-1632261610, DEBIAN-CVE-2020-8625, DLA-2568-1, DSA-4857-1, GHSA-mxh3-93ph-p9r2, MGASA-2021-0110, OESA-2021-1041, RHSA-2021:0669, RHSA-2021:0670, RHSA-2021:0671, RHSA-2021:0672, RHSA-2021:0691, RHSA-2021:0692, RHSA-2021:0693, RHSA-2021:0694, RHSA-2021:0727, RHSA-2021:0922, SUSE-SU-2021:0503-1, SUSE-SU-2021:0504-1, SUSE-SU-2021:0507-1, SUSE-SU-2021:14632-1, UBUNTU-CVE-2020-8625, USN-4737-1, USN-4737-2, openSUSE-SU-2021:0375-1 ## What is CVE-2020-8625? CVE-2020-8625 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 17 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim. ### 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 Weakness: CWE-120 (Buffer Copy without Checking Size of Input) ## Which versions are affected by CVE-2020-8625? It affects 7 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `bind` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-chroot` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-debuginfo` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-devel` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-export-devel` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-export-libs` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-libs` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-libs-lite` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-license` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-lite-devel` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-pkcs11` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-pkcs11-devel` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-pkcs11-libs` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-pkcs11-utils` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-sdb` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-sdb-chroot` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-utils` | Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-chroot` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-debuginfo` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-devel` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-export-devel` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-lite-devel` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-pkcs11` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-pkcs11-devel` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-pkcs11-libs` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-pkcs11-utils` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-sdb` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-sdb-chroot` | Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind` | Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-chroot` | Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-debuginfo` | Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-devel` | Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-export-devel` | Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-export-libs` | Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-libs` | Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-libs-lite` | Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-license` | Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-lite-devel` | Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-26.P2.el7_9.4 | | `bind-pkcs11` | Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-26.P2.el7_9.4 | Products: Debian Debian Linux, Fedoraproject Fedora, Isc Bind, Netapp 500f Firmware, Netapp A250 Firmware, Netapp Cloud Backup, Siemens Sinec Infrastructure Network Services. ## How do I fix CVE-2020-8625? Upgrade to a fixed version. ## Is CVE-2020-8625 being exploited? There is no known exploitation of CVE-2020-8625 in the wild and no public exploit code. ## Other vulnerabilities in Debian Debian Linux - [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild) - [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild) - [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild) - [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild) - [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2020-8625 and fix it if it is affected. What it is: CVE-2020-8625 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 17 Feb 2021. An attacker can exploit it over the internet without logging in, with no action from the victim. Exploitation: There is no known exploitation of CVE-2020-8625 in the wild and no public exploit code. Affected product: Debian Debian Linux. No package-level version data is available, so check the vendor advisory linked from the reference page. Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2020-8625/ (Markdown: https://insights.sbomify.com/CVE-2020-8625/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2020-8625 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-8625 - OSV: https://osv.dev/vulnerability/CVE-2020-8625 --- From sbomify Insights: https://insights.sbomify.com/CVE-2020-8625/ Summaries are generated and may contain mistakes; the official description above is the record.