Debian: Security Advisory (DLA-2568-1)

# SPDX-FileCopyrightText: 2021 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.892568");
  script_cve_id("CVE-2020-8625");
  script_tag(name:"creation_date", value:"2021-02-20 04:00:08 +0000 (Sat, 20 Feb 2021)");
  script_version("2024-02-02T05:06:07+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:07 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"6.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-02-26 13:14:53 +0000 (Fri, 26 Feb 2021)");

  script_name("Debian: Security Advisory (DLA-2568-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2021 Greenbone AG");
  script_family("Debian Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/debian_linux", "ssh/login/packages", re:"ssh/login/release=DEB9");

  script_xref(name:"Advisory-ID", value:"DLA-2568-1");
  script_xref(name:"URL", value:"https://www.debian.org/lts/security/2021/DLA-2568-1");
  script_xref(name:"URL", value:"https://wiki.debian.org/LTS");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'bind9' package(s) announced via the DLA-2568-1 advisory.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable package version is present on the target host.");

  script_tag(name:"insight", value:"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]");

  script_tag(name:"affected", value:"'bind9' package(s) on Debian 9.");

  script_tag(name:"solution", value:"Please install the updated package(s).");

  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"package");

  exit(0);
}

include("revisions-lib.inc");
include("pkg-lib-deb.inc");

release = dpkg_get_ssh_release();
if(!release)
  exit(0);

res = "";
report = "";

if(release == "DEB9") {

  if(!isnull(res = isdpkgvuln(pkg:"bind9", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"bind9-doc", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"bind9-host", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"bind9utils", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"dnsutils", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"host", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libbind-dev", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libbind-export-dev", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libbind9-140", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libdns-export162", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libdns-export162-udeb", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libdns162", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libirs-export141", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libirs-export141-udeb", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libirs141", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libisc-export160", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libisc-export160-udeb", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libisc160", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libisccc-export140", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libisccc-export140-udeb", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libisccc140", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libisccfg-export140", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libisccfg-export140-udeb", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libisccfg140", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"liblwres141", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"lwresd", ver:"1:9.10.3.dfsg.P4-12.3+deb9u8", rls:"DEB9"))) {
    report += res;
  }

  if(report != "") {
    security_message(data:report);
  } else if(__pkg_match) {
    exit(99);
  }
  exit(0);
}

exit(0);