SUSE: Security Advisory (SUSE-SU-2018:1545-1)

# 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("1.3.6.1.4.1.25623.1.1.4.2018.1545.1");
  script_cve_id("CVE-2017-13166", "CVE-2018-1087", "CVE-2018-8781", "CVE-2018-8897");
  script_tag(name:"creation_date", value:"2021-04-19 00:00:00 +0000 (Mon, 19 Apr 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:"7.2");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.0/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:"2018-06-20 14:00:15 +0000 (Wed, 20 Jun 2018)");

  script_name("SUSE: Security Advisory (SUSE-SU-2018:1545-1)");
  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)");

  script_xref(name:"Advisory-ID", value:"SUSE-SU-2018:1545-1");
  script_xref(name:"URL", value:"https://www.suse.com/support/update/announcement/2018/suse-su-20181545-1/");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'Linux Kernel (Live Patch 13 for SLE 12 SP2)' package(s) announced via the SUSE-SU-2018:1545-1 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 the Linux Kernel 4.4.74-92_38 fixes several issues.
The following security issues were fixed:
- CVE-2017-13166: An elevation of privilege vulnerability in the kernel
 v4l2 video driver was fixed. (bsc#1085447).
- CVE-2018-8897: A statement in the System Programming Guide of the Intel
 64 and IA-32 Architectures Software Developer's Manual (SDM) was
 mishandled in the development of some or all operating-system kernels,
 resulting in unexpected behavior for #DB exceptions that are deferred by
 MOV SS or POP SS, as demonstrated by (for example) privilege escalation
 in Windows, macOS, some Xen configurations, or FreeBSD, or a Linux
 kernel crash. The MOV to SS and POP SS instructions inhibit interrupts
 (including NMIs), data breakpoints, and single step trap exceptions
 until the instruction boundary following the next instruction (SDM Vol.
 3A, section 6.8.3). (The inhibited data breakpoints are those on memory
 accessed by the MOV to SS or POP to SS instruction itself.) Note that
 debug exceptions are not inhibited by the interrupt enable (EFLAGS.IF)
 system flag (SDM Vol. 3A, section 2.3). If the instruction following the
 MOV to SS or POP to SS instruction is an instruction like SYSCALL,
 SYSENTER, INT 3, etc. that transfers control to the operating system at
 CPL
 is complete. OS kernels may not expect this order of events and may
 therefore experience unexpected behavior when it occurs (bsc#1090368).
- CVE-2018-8781: The udl_fb_mmap function in drivers/gpu/drm/udl/udl_fb.c
 had an integer-overflow vulnerability allowing local users with access
 to the udldrmfb driver to obtain full read and write permissions on
 kernel physical pages, resulting in a code execution in kernel space
 (bsc#1090646).
- bsc#1083125: Fixed kgraft: small race in reversion code
- CVE-2018-1087: kernel KVM was vulnerable to a flaw in the way the Linux
 kernel's KVM hypervisor handled exceptions delivered after a stack
 switch operation via Mov SS or Pop SS instructions. During the stack
 switch operation, the processor did not deliver interrupts and
 exceptions, rather they are delivered once the first instruction after
 the stack switch is executed. An unprivileged KVM guest user could use
 this flaw to crash the guest or, potentially, escalate their privileges
 in the guest (bsc#1090869) before");

  script_tag(name:"affected", value:"'Linux Kernel (Live Patch 13 for SLE 12 SP2)' package(s) on SUSE Linux Enterprise Server 12-SP2, SUSE Linux Enterprise Server for SAP 12-SP2.");

  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:"kgraft-patch-4_4_74-92_38-default", rpm:"kgraft-patch-4_4_74-92_38-default~9~2.1", rls:"SLES12.0SP2"))) {
    report += res;
  }

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

exit(0);