SUSE: Security Advisory (SUSE-SU-2018:1308-1)

# 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("1.3.6.1.4.1.25623.1.1.4.2018.1308.1");
  script_cve_id("CVE-2017-18030", "CVE-2017-5715", "CVE-2018-5683", "CVE-2018-7550");
  script_tag(name:"creation_date", value:"2021-06-09 14:57:44 +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:"4.6");
  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:C/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2018-03-22 16:50:31 +0000 (Thu, 22 Mar 2018)");

  script_name("SUSE: Security Advisory (SUSE-SU-2018:1308-1)");
  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=(SLES11\.0SP3)");

  script_xref(name:"Advisory-ID", value:"SUSE-SU-2018:1308-1");
  script_xref(name:"URL", value:"https://www.suse.com/support/update/announcement/2018/suse-su-20181308-1/");
  script_xref(name:"URL", value:"https://www.qemu.org/2018/02/14/qemu-2-11-1-and-spectre-update/");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'kvm' package(s) announced via the SUSE-SU-2018:1308-1 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 kvm fixes the following issues:
This update has the next round of Spectre v2 related patches, which now integrates with corresponding changes in libvirt. A January 2018 release of qemu initially addressed the Spectre v2 vulnerability for KVM guests by exposing the spec-ctrl feature for all x86 vcpu types, which was the quick and dirty approach, but not the proper solution. We remove that initial patch and now rely on patches from upstream. This update defines spec_ctrl and ibpb cpu feature flags as well as new cpu models which are clones of existing models with either -IBRS or -IBPB added to the end of the
 model name. These new vcpu models explicitly include the new feature(s),
 whereas the feature flags can be added to the cpu parameter as with other
 features. In short, for continued Spectre v2 protection, ensure that
 either the appropriate cpu feature flag is added to the QEMU
 command-line, or one of the new cpu models is used. Although migration
 from older versions is supported, the new cpu features won't be properly
 exposed to the guest until it is restarted with the cpu features
 explicitly added. A reboot is insufficient.
A warning patch is added which attempts to detect a migration from a qemu version which had the quick and dirty fix (it only detects certain cases,
but hopefully is helpful.)
For additional information on Spectre v2 as it relates to QEMU, see:
[link moved to references]
(CVE-2017-5715 bsc#1068032)
A patch is added to continue to detect Spectre v2 mitigation features (as shown by cpuid), and if found provide that feature to guests, even if running on older KVM (kernel) versions which do not yet expose that feature to QEMU. (bsc#1082276)
Additional security fixes:
- CVE-2018-5683: An out-of-bounds read in vga_draw_text routine was fixed
 which could lead to crashes or information leakage. (bsc#1076114)
- CVE-2018-7550: multiboot OOB access while loading kernel image was fixed
 that could lead to crashes (bsc#1083291)
- CVE-2017-18030: An out-of-bounds access in cirrus_invalidate_region
 routine could lead to crashes or information leakage (bsc#1076179)
- Eliminate bogus use of CPUID_7_0_EDX_PRED_CMD which we've carried since
 the initial Spectre v2 patch was added. EDX bit 27 of CPUID Leaf 07H,
 Sub-leaf 0 provides status on STIBP, and not the PRED_CMD MSR. Exposing
 the STIBP CPUID feature bit to the guest is wrong in general, since the
 VM doesn't directly control the scheduling of physical hyperthreads.
 This is left strictly to the L0 hypervisor.");

  script_tag(name:"affected", value:"'kvm' package(s) on SUSE Linux Enterprise Point of Sale 11-SP3, SUSE Linux Enterprise Server 11-SP3.");

  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 == "SLES11.0SP3") {

  if(!isnull(res = isrpmvuln(pkg:"kvm", rpm:"kvm~1.4.2~53.17.1", rls:"SLES11.0SP3"))) {
    report += res;
  }

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

exit(0);