SUSE: Security Advisory (SUSE-SU-2021:1822-1)

# 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("1.3.6.1.4.1.25623.1.1.4.2021.1822.1");
  script_cve_id("CVE-2021-25217");
  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:"3.3");
  script_tag(name:"cvss_base_vector", value:"AV:A/AC:L/Au:N/C:N/I:N/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-06-09 16:47:32 +0000 (Wed, 09 Jun 2021)");

  script_name("SUSE: Security Advisory (SUSE-SU-2021:1822-1)");
  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=(SLES12\.0SP2|SLES12\.0SP3|SLES12\.0SP4|SLES12\.0SP5)");

  script_xref(name:"Advisory-ID", value:"SUSE-SU-2021:1822-1");
  script_xref(name:"URL", value:"https://www.suse.com/support/update/announcement/2021/suse-su-20211822-1.html");
  script_xref(name:"URL", value:"https://bugzilla.suse.com/1186382");
  script_xref(name:"URL", value:"https://lists.suse.com/pipermail/sle-security-updates/2021-June/008906.html");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'dhcp' package(s) announced via the SUSE-SU-2021:1822-1 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 dhcp fixes the following issues:

- CVE-2021-25217: A buffer overrun in lease file parsing code can be used to exploit a common vulnerability shared by dhcpd and dhclient (bsc#1186382)");

  script_tag(name:"affected", value:"'dhcp' package(s) on SUSE Linux Enterprise Server 12-SP2, SUSE Linux Enterprise Server 12-SP3, SUSE Linux Enterprise Server 12-SP4, SUSE Linux Enterprise Server 12-SP5, SUSE Linux Enterprise Server for SAP Applications 12-SP3, SUSE Linux Enterprise Server for SAP Applications 12-SP4, SUSE Linux Enterprise Server for SAP Applications 12-SP5.");

  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 == "SLES12.0SP2") {

  if(!isnull(res = isrpmvuln(pkg:"dhcp", rpm:"dhcp~4.3.3~10.22.1", rls:"SLES12.0SP2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"dhcp-client", rpm:"dhcp-client~4.3.3~10.22.1", rls:"SLES12.0SP2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"dhcp-relay", rpm:"dhcp-relay~4.3.3~10.22.1", rls:"SLES12.0SP2"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"dhcp-server", rpm:"dhcp-server~4.3.3~10.22.1", rls:"SLES12.0SP2"))) {
    report += res;
  }

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

if(release == "SLES12.0SP3") {

  if(!isnull(res = isrpmvuln(pkg:"dhcp", rpm:"dhcp~4.3.3~10.22.1", rls:"SLES12.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"dhcp-client", rpm:"dhcp-client~4.3.3~10.22.1", rls:"SLES12.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"dhcp-relay", rpm:"dhcp-relay~4.3.3~10.22.1", rls:"SLES12.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"dhcp-server", rpm:"dhcp-server~4.3.3~10.22.1", rls:"SLES12.0SP3"))) {
    report += res;
  }

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

if(release == "SLES12.0SP4") {

  if(!isnull(res = isrpmvuln(pkg:"dhcp", rpm:"dhcp~4.3.3~10.22.1", rls:"SLES12.0SP4"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"dhcp-client", rpm:"dhcp-client~4.3.3~10.22.1", rls:"SLES12.0SP4"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"dhcp-relay", rpm:"dhcp-relay~4.3.3~10.22.1", rls:"SLES12.0SP4"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"dhcp-server", rpm:"dhcp-server~4.3.3~10.22.1", rls:"SLES12.0SP4"))) {
    report += res;
  }

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

if(release == "SLES12.0SP5") {

  if(!isnull(res = isrpmvuln(pkg:"dhcp", rpm:"dhcp~4.3.3~10.22.1", rls:"SLES12.0SP5"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"dhcp-client", rpm:"dhcp-client~4.3.3~10.22.1", rls:"SLES12.0SP5"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"dhcp-relay", rpm:"dhcp-relay~4.3.3~10.22.1", rls:"SLES12.0SP5"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"dhcp-server", rpm:"dhcp-server~4.3.3~10.22.1", rls:"SLES12.0SP5"))) {
    report += res;
  }

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

exit(0);