Huawei EulerOS: Security Advisory for grub2 (EulerOS-SA-2023-1407)

# SPDX-FileCopyrightText: 2023 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("1.3.6.1.4.1.25623.1.1.2.2023.1407");
  script_cve_id("CVE-2022-2601", "CVE-2022-3775");
  script_tag(name:"creation_date", value:"2023-03-07 14:04:56 +0000 (Tue, 07 Mar 2023)");
  script_version("2024-02-05T14:36:57+0000");
  script_tag(name:"last_modification", value:"2024-02-05 14:36:57 +0000 (Mon, 05 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:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2022-12-16 21:29:14 +0000 (Fri, 16 Dec 2022)");

  script_name("Huawei EulerOS: Security Advisory for grub2 (EulerOS-SA-2023-1407)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2023 Greenbone AG");
  script_family("Huawei EulerOS Local Security Checks");
  script_dependencies("gb_huawei_euleros_consolidation.nasl");
  script_mandatory_keys("ssh/login/euleros", "ssh/login/rpms", re:"ssh/login/release=EULEROS\-2\.0SP11");

  script_xref(name:"Advisory-ID", value:"EulerOS-SA-2023-1407");
  script_xref(name:"URL", value:"https://developer.huaweicloud.com/intl/en-us/euleros/securitydetail.html?secId=EulerOS-SA-2023-1407");

  script_tag(name:"summary", value:"The remote host is missing an update for the Huawei EulerOS 'grub2' package(s) announced via the EulerOS-SA-2023-1407 advisory.");

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

  script_tag(name:"insight", value:"A buffer overflow was found in grub_font_construct_glyph(). A malicious crafted pf2 font can lead to an overflow when calculating the max_glyph_size value, allocating a smaller than needed buffer for the glyph, this further leads to a buffer overflow and a heap based out-of-bounds write. An attacker may use this vulnerability to circumvent the secure boot mechanism.(CVE-2022-2601)

When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded.(CVE-2022-3775)");

  script_tag(name:"affected", value:"'grub2' package(s) on Huawei EulerOS V2.0SP11.");

  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 == "EULEROS-2.0SP11") {

  if(!isnull(res = isrpmvuln(pkg:"grub2-common", rpm:"grub2-common~2.06~3.h19.eulerosv2r11", rls:"EULEROS-2.0SP11"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"grub2-efi-aa64", rpm:"grub2-efi-aa64~2.06~3.h19.eulerosv2r11", rls:"EULEROS-2.0SP11"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"grub2-efi-aa64-modules", rpm:"grub2-efi-aa64-modules~2.06~3.h19.eulerosv2r11", rls:"EULEROS-2.0SP11"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"grub2-tools", rpm:"grub2-tools~2.06~3.h19.eulerosv2r11", rls:"EULEROS-2.0SP11"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"grub2-tools-extra", rpm:"grub2-tools-extra~2.06~3.h19.eulerosv2r11", rls:"EULEROS-2.0SP11"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"grub2-tools-minimal", rpm:"grub2-tools-minimal~2.06~3.h19.eulerosv2r11", rls:"EULEROS-2.0SP11"))) {
    report += res;
  }

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

exit(0);