SUSE: Security Advisory (SUSE-SU-2019:1851-1)

# 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("1.3.6.1.4.1.25623.1.1.4.2019.1851.1");
  script_cve_id("CVE-2018-16871", "CVE-2018-20836", "CVE-2019-10126", "CVE-2019-10638", "CVE-2019-10639", "CVE-2019-11478", "CVE-2019-11599", "CVE-2019-12456", "CVE-2019-12614", "CVE-2019-12818", "CVE-2019-12819");
  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:"9.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-06-17 14:11:17 +0000 (Mon, 17 Jun 2019)");

  script_name("SUSE: Security Advisory (SUSE-SU-2019:1851-1)");
  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\.0SP4)");

  script_xref(name:"Advisory-ID", value:"SUSE-SU-2019:1851-1");
  script_xref(name:"URL", value:"https://www.suse.com/support/update/announcement/2019/suse-su-20191851-1/");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'Linux Kernel' package(s) announced via the SUSE-SU-2019:1851-1 advisory.");

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

  script_tag(name:"insight", value:"The SUSE Linux Enterprise 12 SP4 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:
CVE-2019-10638: A device could have been tracked by an attacker using
 the IP ID values the kernel produces for connection-less protocols
 (e.g., UDP and ICMP). When such traffic was sent to multiple destination
 IP addresses, it was possible to obtain hash collisions (of indices to
 the counter array) and thereby obtain the hashing key (via enumeration).
 An attack may have been conducted by hosting a crafted web page that
 uses WebRTC or gQUIC to force UDP traffic to attacker-controlled IP
 addresses. (bnc#1140575)

CVE-2019-10639: Information Exposure (partial kernel address
 disclosure), leading to a KASLR bypass. Specifically, it was possible to
 extract the KASLR kernel image offset using the IP ID values the kernel
 produces for connection-less protocols (e.g., UDP and ICMP). When such
 traffic was sent to multiple destination IP addresses, it was possible
 to obtain hash collisions (of indices to the counter array) and thereby
 obtain the hashing key (via enumeration). This key contains enough bits
 from a kernel address (of a static variable) so when the key is
 extracted (via enumeration), the offset of the kernel image was exposed.
 This attack could have been carried out remotely, by the attacker
 forcing the target device to send UDP or ICMP (or certain other) traffic
 to attacker-controlled IP addresses. Forcing a server to send UDP
 traffic is trivial if the server is a DNS server. ICMP traffic was
 trivial if the server answered ICMP Echo requests (ping). For client
 targets, if the target visited the attacker's web page, then WebRTC or
 gQUIC could be used to force UDP traffic to attacker-controlled IP
 addresses. (bnc#1140577)

CVE-2018-20836: A race condition in smp_task_timedout() and
 smp_task_done() in drivers/scsi/libsas/sas_expander.c, could have lead
 to a use-after-free. (bnc#1134395)

CVE-2019-11599: The coredump implementation in the Linux kernel did not
 use locking or other mechanisms to prevent vma layout or vma flags
 changes while it runs, which allowed local users to obtain sensitive
 information, cause a denial of service, or possibly have unspecified
 other impact by triggering a race condition with mmget_not_zero or
 get_task_mm calls. This is related to fs/userfaultfd.c, mm/mmap.c,
 fs/proc/task_mmu.c, and drivers/infiniband/core/uverbs_main.c.
 (bnc#1133738)

CVE-2019-12614: An unchecked kstrdup might have allowed an attacker to
 cause denial of service (a NULL pointer dereference and system crash).
 (bnc#1137194)

CVE-2019-12819: The function __mdiobus_register() in
 drivers/net/phy/mdio_bus.c called put_device() which would trigger a
 fixed_mdio_bus_init use-after-free. This would cause a denial of
 service. (bnc#1138291)

CVE-2019-12818: The nfc_llcp_build_tlv function in
 net/nfc/llcp_commands.c ... [Please see the references for more information on the vulnerabilities]");

  script_tag(name:"affected", value:"'Linux Kernel' package(s) on SUSE Linux Enterprise Desktop 12-SP4, SUSE Linux Enterprise High Availability 12-SP4, SUSE Linux Enterprise Live Patching 12-SP4, SUSE Linux Enterprise Server 12-SP4, SUSE Linux Enterprise Software Development Kit 12-SP4, SUSE Linux Enterprise Workstation Extension 12-SP4.");

  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 == "SLES12.0SP4") {

  if(!isnull(res = isrpmvuln(pkg:"kernel-default", rpm:"kernel-default~4.12.14~95.24.1", rls:"SLES12.0SP4"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-default-base", rpm:"kernel-default-base~4.12.14~95.24.1", rls:"SLES12.0SP4"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-default-base-debuginfo", rpm:"kernel-default-base-debuginfo~4.12.14~95.24.1", rls:"SLES12.0SP4"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-default-debuginfo", rpm:"kernel-default-debuginfo~4.12.14~95.24.1", rls:"SLES12.0SP4"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-default-debugsource", rpm:"kernel-default-debugsource~4.12.14~95.24.1", rls:"SLES12.0SP4"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-default-devel", rpm:"kernel-default-devel~4.12.14~95.24.1", rls:"SLES12.0SP4"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-default-devel-debuginfo", rpm:"kernel-default-devel-debuginfo~4.12.14~95.24.1", rls:"SLES12.0SP4"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-default-man", rpm:"kernel-default-man~4.12.14~95.24.1", rls:"SLES12.0SP4"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-devel", rpm:"kernel-devel~4.12.14~95.24.1", rls:"SLES12.0SP4"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-macros", rpm:"kernel-macros~4.12.14~95.24.1", rls:"SLES12.0SP4"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-source", rpm:"kernel-source~4.12.14~95.24.1", rls:"SLES12.0SP4"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-syms", rpm:"kernel-syms~4.12.14~95.24.1", rls:"SLES12.0SP4"))) {
    report += res;
  }

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

exit(0);