Test ID:	1.3.6.1.4.1.25623.1.0.892568
Category:	Debian Local Security Checks
Title:	Debian: Security Advisory (DLA-2568-1)
Summary:	The remote host is missing an update for the Debian 'bind9' package(s) announced via the DLA-2568-1 advisory.
Description:	Summary: The remote host is missing an update for the Debian 'bind9' package(s) announced via the DLA-2568-1 advisory. Vulnerability Insight: It was discovered that there was a buffer overflow attack in the bind9 DNS server caused by an issue in the GSSAPI ('Generic Security Services') security policy negotiation. CVE-2020-8625 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 For Debian 9 Stretch, these problems have been fixed in version 1:9.10.3.dfsg.P4-12.3+deb9u8. We recommend that you upgrade your bind9 packages. Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: [link moved to references] Affected Software/OS: 'bind9' package(s) on Debian 9. Solution: Please install the updated package(s). CVSS Score: 6.8 CVSS Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2020-8625 https://kb.isc.org/v1/docs/cve-2020-8625 Debian Security Information: DSA-4857 (Google Search) https://www.debian.org/security/2021/dsa-4857 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QWCMBOSZOJIIET7BWTRYS3HLX5TSDKHX/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KYXAF7G45RXDVNUTWWCI2CVTHRZ67LST/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EBTPWRQWRQEJNWY4NHO4WLS4KLJ3ERHZ/ https://www.zerodayinitiative.com/advisories/ZDI-21-195/ https://lists.debian.org/debian-lts-announce/2021/02/msg00029.html http://www.openwall.com/lists/oss-security/2021/02/19/1 http://www.openwall.com/lists/oss-security/2021/02/20/2
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