SUSE: Security Advisory (SUSE-SU-2019:0875-1)

# 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("1.3.6.1.4.1.25623.1.1.4.2019.0875.1");
  script_cve_id("CVE-2018-19967");
  script_tag(name:"creation_date", value:"2021-06-09 14:57:26 +0000 (Wed, 09 Jun 2021)");
  script_version("2024-02-02T14:37:50+0000");
  script_tag(name:"last_modification", value:"2024-02-02 14:37:50 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"4.9");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:N/I:N/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-02-04 20:33:38 +0000 (Mon, 04 Feb 2019)");

  script_name("SUSE: Security Advisory (SUSE-SU-2019:0875-1)");
  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-2019:0875-1");
  script_xref(name:"URL", value:"https://www.suse.com/support/update/announcement/2019/suse-su-20190875-1/");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'xen' package(s) announced via the SUSE-SU-2019:0875-1 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 xen fixes the following issues:

Security issues fixed:
CVE-2018-19967: Fixed HLE constructs that allowed guests to lock up the
 host, resulting in a Denial of Service (DoS). (XSA-282) (bsc#1114988)

Fixed an issue which could allow malicious PV guests may cause a host
 crash or gain access to data pertaining to other guests.Additionally,
 vulnerable configurations are likely to be unstable even in the absence
 of an attack (bsc#1126198).

Fixed multiple access violations introduced by XENMEM_exchange hypercall
 which could allow a single PV guest to leak arbitrary amounts of memory,
 leading to a denial of service (bsc#1126192).

Fixed an issue which could allow a malicious unprivileged guest
 userspace process to escalate its privilege to that of other userspace
 processes in the same guest and potentially thereby to that
 of the guest operating system (bsc#1126201).

Fixed an issue which could allow malicious or buggy x86 PV guest kernels
 to mount a Denial of Service attack affecting the whole system
 (bsc#1126197).

Fixed an issue which could allow an untrusted PV domain with access to a
 physical device to DMA into its own pagetables leading to privilege
 escalation (bsc#1126195).

Fixed an issue which could allow a malicious or buggy x86 PV guest
 kernels can mount a Denial of Service attack affecting the whole system
 (bsc#1126196).

Fixed an issue which could allow malicious 64bit PV guests to cause a
 host crash (bsc#1127400).

Fixed an issue which could allow malicious or buggy guests with passed
 through PCI devices to be able to escalate their privileges, crash the
 host, or access data belonging to other guests. Additionally memory
 leaks were also possible (bsc#1126140).

Fixed a race condition issue which could allow malicious PV guests to
 escalate their privilege to that
 of the hypervisor (bsc#1126141).

Other issues fixed:
Upstream bug fixes (bsc#1027519)

Fixed an issue where setup of grant_tables and other variables may fail
 (bsc#1126325).

Added a requirement for xen, xl.cfg firmware='pvgrub32<pipe>pvgrub64
 (bsc#1127620).

Added Xen cmdline option 'suse_vtsc_tolerance' to avoid TSC emulation
 for HVM domUs (bsc#1026236).");

  script_tag(name:"affected", value:"'xen' package(s) on SUSE Linux Enterprise Module for Basesystem 15, SUSE Linux Enterprise Module for Server 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:"xen-debugsource", rpm:"xen-debugsource~4.10.3_02~3.14.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"xen-libs", rpm:"xen-libs~4.10.3_02~3.14.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"xen-libs-debuginfo", rpm:"xen-libs-debuginfo~4.10.3_02~3.14.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"xen-tools-domU", rpm:"xen-tools-domU~4.10.3_02~3.14.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"xen-tools-domU-debuginfo", rpm:"xen-tools-domU-debuginfo~4.10.3_02~3.14.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"xen", rpm:"xen~4.10.3_02~3.14.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"xen-devel", rpm:"xen-devel~4.10.3_02~3.14.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"xen-tools", rpm:"xen-tools~4.10.3_02~3.14.1", rls:"SLES15.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"xen-tools-debuginfo", rpm:"xen-tools-debuginfo~4.10.3_02~3.14.1", rls:"SLES15.0"))) {
    report += res;
  }

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

exit(0);