SUSE: Security Advisory (SUSE-SU-2021:3941-1)

# 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("1.3.6.1.4.1.25623.1.1.4.2021.3941.1");
  script_cve_id("CVE-2021-0941", "CVE-2021-20322", "CVE-2021-31916", "CVE-2021-34981");
  script_tag(name:"creation_date", value:"2021-12-07 08:23:32 +0000 (Tue, 07 Dec 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:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2022-03-01 19:33:11 +0000 (Tue, 01 Mar 2022)");

  script_name("SUSE: Security Advisory (SUSE-SU-2021:3941-1)");
  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\.0SP3)");

  script_xref(name:"Advisory-ID", value:"SUSE-SU-2021:3941-1");
  script_xref(name:"URL", value:"https://www.suse.com/support/update/announcement/2021/suse-su-20213941-1/");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'Linux Kernel' package(s) announced via the SUSE-SU-2021:3941-1 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 15 SP3 kernel was updated to receive various security and bugfixes.

The following security bugs were fixed:

Unprivileged BPF has been disabled by default to reduce attack surface
 as too many security issues have happened in the past (jsc#SLE-22573)

 You can re-enable via systemctl setting
/proc/sys/kernel/unprivileged_bpf_disabled to 0.
(kernel.unprivileged_bpf_disabled = 0)

CVE-2021-0941: In bpf_skb_change_head of filter.c, there is a possible
 out of bounds read due to a use after free. This could lead to local
 escalation of privilege with System execution privileges needed. User
 interaction is not needed for exploitation (bnc#1192045 ).

CVE-2021-31916: An out-of-bounds (OOB) memory write flaw was found in
 list_devices in drivers/md/dm-ioctl.c in the Multi-device driver module
 in the Linux kernel A bound check failure allowed an attacker with
 special user (CAP_SYS_ADMIN) privilege to gain access to out-of-bounds
 memory leading to a system crash or a leak of internal kernel
 information. The highest threat from this vulnerability is to system
 availability (bnc#1192781).

CVE-2021-20322: Make the ipv4 and ipv6 ICMP exception caches less
 predictive to avoid information leaks about UDP ports in use.
 (bsc#1191790)

CVE-2021-34981: Fixed file refcounting in cmtp when cmtp_attach_device
 fails (bsc#1191961).

The following non-security bugs were fixed:

ABI: sysfs-kernel-slab: Document some stats (git-fixes).

ALSA: hda: fix general protection fault in azx_runtime_idle (git-fixes).

ALSA: hda: Free card instance properly at probe errors (git-fixes).

ALSA: usb-audio: Add Audient iD14 to mixer map quirk table (git-fixes).

ALSA: usb-audio: Add minimal-mute notion in dB mapping table
 (bsc#1192375).

ALSA: usb-audio: Add Schiit Hel device to mixer map quirk table
 (git-fixes).

ALSA: usb-audio: Fix dB level of Bose Revolve+ SoundLink (bsc#1192375).

ALSA: usb-audio: Use int for dB map values (bsc#1192375).

ARM: socfpga: Fix crash with CONFIG_FORTIRY_SOURCE (bsc#1192473).

auxdisplay: ht16k33: Connect backlight to fbdev (git-fixes).

auxdisplay: ht16k33: Fix frame buffer device blanking (git-fixes).

auxdisplay: img-ascii-lcd: Fix lock-up when displaying empty string
 (git-fixes).

bpf: Add kconfig knob for disabling unpriv bpf by default (jsc#SLE-22573)

bpf: Add kconfig knob for disabling unpriv bpf by default (jsc#SLE-22574)

bpf: Disallow unprivileged bpf by default (jsc#SLE-22573).

bpf: Disallow unprivileged bpf by default (jsc#SLE-22574).

bpf: Fix BPF_JIT kconfig symbol dependency (git-fixes jsc#SLE-22574).

bpf: Fix potential race in tail call compatibility check (git-fixes).

bpf, kconfig: Add consolidated menu entry for bpf with core options
 (jsc#SLE-22574).

btrfs: block-group: Rework documentation of check_system_chunk function
 (bsc#1192896).

btrfs: fix deadlock between chunk allocation and chunk btree
 modifications ... [Please see the references for more information on the vulnerabilities]");

  script_tag(name:"affected", value:"'Linux Kernel' package(s) on SUSE Linux Enterprise High Availability 15-SP3, SUSE Linux Enterprise Module for Basesystem 15-SP3, SUSE Linux Enterprise Module for Development Tools 15-SP3, SUSE Linux Enterprise Module for Legacy Software 15-SP3, SUSE Linux Enterprise Module for Live Patching 15-SP3, SUSE Linux Enterprise Workstation Extension 15-SP3, SUSE MicroOS 5.1.");

  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 == "SLES15.0SP3") {

  if(!isnull(res = isrpmvuln(pkg:"kernel-64kb", rpm:"kernel-64kb~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-64kb-debuginfo", rpm:"kernel-64kb-debuginfo~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-64kb-debugsource", rpm:"kernel-64kb-debugsource~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-64kb-devel", rpm:"kernel-64kb-devel~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-64kb-devel-debuginfo", rpm:"kernel-64kb-devel-debuginfo~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-default", rpm:"kernel-default~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-default-base", rpm:"kernel-default-base~5.3.18~59.37.2.18.23.3", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-default-debuginfo", rpm:"kernel-default-debuginfo~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-default-debugsource", rpm:"kernel-default-debugsource~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-default-devel", rpm:"kernel-default-devel~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-default-devel-debuginfo", rpm:"kernel-default-devel-debuginfo~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-devel", rpm:"kernel-devel~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-macros", rpm:"kernel-macros~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-preempt", rpm:"kernel-preempt~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-preempt-debuginfo", rpm:"kernel-preempt-debuginfo~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-preempt-debugsource", rpm:"kernel-preempt-debugsource~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-zfcpdump", rpm:"kernel-zfcpdump~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-zfcpdump-debuginfo", rpm:"kernel-zfcpdump-debuginfo~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-zfcpdump-debugsource", rpm:"kernel-zfcpdump-debugsource~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-docs", rpm:"kernel-docs~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-obs-build", rpm:"kernel-obs-build~5.3.18~59.37.3", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-obs-build-debugsource", rpm:"kernel-obs-build-debugsource~5.3.18~59.37.3", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-preempt-devel", rpm:"kernel-preempt-devel~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-preempt-devel-debuginfo", rpm:"kernel-preempt-devel-debuginfo~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-source", rpm:"kernel-source~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-syms", rpm:"kernel-syms~5.3.18~59.37.1", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"reiserfs-kmp-default", rpm:"reiserfs-kmp-default~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"reiserfs-kmp-default-debuginfo", rpm:"reiserfs-kmp-default-debuginfo~5.3.18~59.37.2", rls:"SLES15.0SP3"))) {
    report += res;
  }

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

exit(0);