Huawei EulerOS: Security Advisory for libxml2 (EulerOS-SA-2025-2017)

# SPDX-FileCopyrightText: 2025 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("1.3.6.1.4.1.25623.1.1.2.2025.2017");
  script_cve_id("CVE-2025-49794", "CVE-2025-49796", "CVE-2025-6021", "CVE-2025-6170");
  script_tag(name:"creation_date", value:"2025-09-10 04:27:54 +0000 (Wed, 10 Sep 2025)");
  script_version("2025-09-10T05:38:24+0000");
  script_tag(name:"last_modification", value:"2025-09-10 05:38:24 +0000 (Wed, 10 Sep 2025)");
  script_tag(name:"cvss_base", value:"9.4");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2025-06-16 16:15:19 +0000 (Mon, 16 Jun 2025)");

  script_name("Huawei EulerOS: Security Advisory for libxml2 (EulerOS-SA-2025-2017)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2025 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\.0SP12\-X86_64");

  script_xref(name:"Advisory-ID", value:"EulerOS-SA-2025-2017");
  script_xref(name:"URL", value:"https://developer.huaweicloud.com/intl/en-us/euleros/securitydetail.html?secId=EulerOS-SA-2025-2017");

  script_tag(name:"summary", value:"The remote host is missing an update for the Huawei EulerOS 'libxml2' package(s) announced via the EulerOS-SA-2025-2017 advisory.");

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

  script_tag(name:"insight", value:"A flaw was found in the interactive shell of the xmllint command-line tool, used for parsing XML files. When a user inputs an overly long command, the program does not check the input size properly, which can cause it to crash. This issue might allow attackers to run harmful code in rare configurations without modern protections.(CVE-2025-6170)

A flaw was found in libxml2's xmlBuildQName function, where integer overflows in buffer size calculations can lead to a stack-based buffer overflow. This issue can result in memory corruption or a denial of service when processing crafted input.(CVE-2025-6021)

A use-after-free vulnerability was found in libxml2. This issue occurs when parsing XPath elements under certain circumstances when the XML schematron has the <sch:name path='...'/> schema elements. This flaw allows a malicious actor to craft a malicious XML document used as input for libxml, resulting in the program's crash using libxml or other possible undefined behaviors.(CVE-2025-49794)

A vulnerability was found in libxml2. Processing certain sch:name elements from the input XML file can trigger a memory corruption issue. This flaw allows an attacker to craft a malicious XML input file that can lead libxml to crash, resulting in a denial of service or other possible undefined behavior due to sensitive data being corrupted in memory.(CVE-2025-49796)");

  script_tag(name:"affected", value:"'libxml2' package(s) on Huawei EulerOS V2.0SP12(x86_64).");

  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-2.0SP12-x86_64") {

  if(!isnull(res = isrpmvuln(pkg:"libxml2", rpm:"libxml2~2.9.14~4.h29.eulerosv2r12", rls:"EULEROS-2.0SP12-x86_64"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"python3-libxml2", rpm:"python3-libxml2~2.9.14~4.h29.eulerosv2r12", rls:"EULEROS-2.0SP12-x86_64"))) {
    report += res;
  }

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

exit(0);