SUSE: Security Advisory (SUSE-SU-2021:1845-1)

# 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("1.3.6.1.4.1.25623.1.1.4.2021.1845.1");
  script_cve_id("CVE-2021-26720", "CVE-2021-3468");
  script_tag(name:"creation_date", value:"2021-06-09 14:56:37 +0000 (Wed, 09 Jun 2021)");
  script_version("2025-08-15T15:42:25+0000");
  script_tag(name:"last_modification", value:"2025-08-15 15:42:25 +0000 (Fri, 15 Aug 2025)");
  script_tag(name:"cvss_base", value:"4.6");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:P/I:P/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-02-25 21:27:11 +0000 (Thu, 25 Feb 2021)");

  script_name("SUSE: Security Advisory (SUSE-SU-2021:1845-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2021 Greenbone AG");
  script_family("SuSE Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/suse_sles", "ssh/login/rpms", re:"ssh/login/release=(SLES15\.0)");

  script_xref(name:"Advisory-ID", value:"SUSE-SU-2021:1845-1");
  script_xref(name:"URL", value:"https://www.suse.com/support/update/announcement/2021/suse-su-20211845-1.html");
  script_xref(name:"URL", value:"https://bugzilla.suse.com/1180827");
  script_xref(name:"URL", value:"https://bugzilla.suse.com/1184521");
  script_xref(name:"URL", value:"https://lists.suse.com/pipermail/sle-security-updates/2021-June/008925.html");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'avahi' package(s) announced via the SUSE-SU-2021:1845-1 advisory.");

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

  script_tag(name:"insight", value:"This update for avahi fixes the following issues:

- CVE-2021-3468: avoid infinite loop by handling HUP event in client_work (bsc#1184521).
- CVE-2021-26720: drop privileges when invoking avahi-daemon-check-dns.sh (bsc#1180827)
- Update avahi-daemon-check-dns.sh from Debian. Our previous version relied on ifconfig, route, and init.d.
- Add sudo to requires: used to drop privileges.");

  script_tag(name:"affected", value:"'avahi' package(s) on SUSE Linux Enterprise Server 15, SUSE Linux Enterprise Server for SAP Applications 15.");

  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-rpm.inc");

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

res = "";
report = "";

if(release == "SLES15.0") {

  if(!isnull(res = isrpmvuln(pkg:"avahi", rpm:"avahi~0.6.32~5.13.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"avahi-autoipd", rpm:"avahi-autoipd~0.6.32~5.13.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"avahi-compat-howl-devel", rpm:"avahi-compat-howl-devel~0.6.32~5.13.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"avahi-compat-mDNSResponder-devel", rpm:"avahi-compat-mDNSResponder-devel~0.6.32~5.13.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"avahi-lang", rpm:"avahi-lang~0.6.32~5.13.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"avahi-utils", rpm:"avahi-utils~0.6.32~5.13.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"avahi-utils-gtk", rpm:"avahi-utils-gtk~0.6.32~5.13.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libavahi-client3", rpm:"libavahi-client3~0.6.32~5.13.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libavahi-client3-32bit", rpm:"libavahi-client3-32bit~0.6.32~5.13.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libavahi-common3", rpm:"libavahi-common3~0.6.32~5.13.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libavahi-common3-32bit", rpm:"libavahi-common3-32bit~0.6.32~5.13.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libavahi-core7", rpm:"libavahi-core7~0.6.32~5.13.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libavahi-devel", rpm:"libavahi-devel~0.6.32~5.13.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libavahi-glib-devel", rpm:"libavahi-glib-devel~0.6.32~5.13.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libavahi-glib1", rpm:"libavahi-glib1~0.6.32~5.13.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libavahi-gobject-devel", rpm:"libavahi-gobject-devel~0.6.32~5.13.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libavahi-gobject0", rpm:"libavahi-gobject0~0.6.32~5.13.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libavahi-ui-gtk3-0", rpm:"libavahi-ui-gtk3-0~0.6.32~5.13.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libavahi-ui0", rpm:"libavahi-ui0~0.6.32~5.13.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libdns_sd", rpm:"libdns_sd~0.6.32~5.13.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libhowl0", rpm:"libhowl0~0.6.32~5.13.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"typelib-1_0-Avahi-0_6", rpm:"typelib-1_0-Avahi-0_6~0.6.32~5.13.1", rls:"SLES15.0"))) {
    report += res;
  }

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

exit(0);