Mageia: Security Advisory (MGASA-2021-0348)

# SPDX-FileCopyrightText: 2022 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("1.3.6.1.4.1.25623.1.1.10.2021.0348");
  script_cve_id("CVE-2020-26541", "CVE-2021-22543", "CVE-2021-35039");
  script_tag(name:"creation_date", value:"2022-01-28 10:58:44 +0000 (Fri, 28 Jan 2022)");
  script_version("2024-02-02T05:06:09+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:09 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"6.9");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:M/Au:N/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/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:"2021-07-15 15:16:19 +0000 (Thu, 15 Jul 2021)");

  script_name("Mageia: Security Advisory (MGASA-2021-0348)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2022 Greenbone AG");
  script_family("Mageia Linux Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/mageia_linux", "ssh/login/release", re:"ssh/login/release=MAGEIA8");

  script_xref(name:"Advisory-ID", value:"MGASA-2021-0348");
  script_xref(name:"URL", value:"https://advisories.mageia.org/MGASA-2021-0348.html");
  script_xref(name:"URL", value:"https://bugs.mageia.org/show_bug.cgi?id=29236");
  script_xref(name:"URL", value:"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.47");
  script_xref(name:"URL", value:"https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.48");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'kernel-linus' package(s) announced via the MGASA-2021-0348 advisory.");

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

  script_tag(name:"insight", value:"This kernel-linus update is based on upstream 5.10.48 and fixes at least the
following security issues:

The Linux kernel through 5.8.13 does not properly enforce the Secure Boot
Forbidden Signature Database (aka dbx) protection mechanism. This affects
certs/blacklist.c and certs/system_keyring.c (CVE-2020-26541).

An issue was discovered in Linux: KVM through Improper handling of VM_IO<pipe>
VM_PFNMAP vmas in KVM can bypass RO checks and can lead to pages being
freed while still accessible by the VMM and guest. This allows users with
the ability to start and control a VM to read/write random pages of memory
and can result in local privilege escalation (CVE-2021-22543).

kernel/module.c in the Linux kernel before 5.12.14 mishandles Signature
Verification. Without CONFIG_MODULE_SIG, verification that a kernel module
is signed, for loading via init_module, does not occur for a
module.sig_enforce=1 command-line argument (CVE-2021-35039).

For other upstream fixes, see the referenced changelogs.");

  script_tag(name:"affected", value:"'kernel-linus' package(s) on Mageia 8.");

  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 == "MAGEIA8") {

  if(!isnull(res = isrpmvuln(pkg:"kernel-linus-5.10.48-1.mga8", rpm:"kernel-linus-5.10.48-1.mga8~1~1.mga8", rls:"MAGEIA8"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-linus", rpm:"kernel-linus~5.10.48~1.mga8", rls:"MAGEIA8"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-linus-devel-5.10.48-1.mga8", rpm:"kernel-linus-devel-5.10.48-1.mga8~1~1.mga8", rls:"MAGEIA8"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-linus-devel-latest", rpm:"kernel-linus-devel-latest~5.10.48~1.mga8", rls:"MAGEIA8"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-linus-doc", rpm:"kernel-linus-doc~5.10.48~1.mga8", rls:"MAGEIA8"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-linus-latest", rpm:"kernel-linus-latest~5.10.48~1.mga8", rls:"MAGEIA8"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-linus-source-5.10.48-1.mga8", rpm:"kernel-linus-source-5.10.48-1.mga8~1~1.mga8", rls:"MAGEIA8"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"kernel-linus-source-latest", rpm:"kernel-linus-source-latest~5.10.48~1.mga8", rls:"MAGEIA8"))) {
    report += res;
  }

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

exit(0);