Huawei EulerOS: Security Advisory for pam (EulerOS-SA-2025-2591)

# 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("1.3.6.1.4.1.25623.1.1.2.2025.2591");
  script_cve_id("CVE-2025-6020", "CVE-2025-8941");
  script_tag(name:"creation_date", value:"2025-12-19 04:38:02 +0000 (Fri, 19 Dec 2025)");
  script_version("2025-12-19T05:45:49+0000");
  script_tag(name:"last_modification", value:"2025-12-19 05:45:49 +0000 (Fri, 19 Dec 2025)");
  script_tag(name:"cvss_base", value:"6.8");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:S/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:"2025-08-13 15:15:41 +0000 (Wed, 13 Aug 2025)");

  script_name("Huawei EulerOS: Security Advisory for pam (EulerOS-SA-2025-2591)");
  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=EULEROSVIRT\-2\.13\.0");

  script_xref(name:"Advisory-ID", value:"EulerOS-SA-2025-2591");
  script_xref(name:"URL", value:"https://developer.huaweicloud.com/intl/en-us/euleros/securitydetail.html?secId=EulerOS-SA-2025-2591");

  script_tag(name:"summary", value:"The remote host is missing an update for the Huawei EulerOS 'pam' package(s) announced via the EulerOS-SA-2025-2591 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 linux-pam. The pam_namespace module may improperly handle user-controlled paths, allowing local users to exploit symlink attacks and race conditions to elevate their privileges to root. This CVE provides a 'complete' fix for CVE-2025-6020.(CVE-2025-8941)

A flaw was found in linux-pam. The module pam_namespace may use access user-controlled paths without proper protection, allowing local users to elevate their privileges to root via multiple symlink attacks and race conditions.(CVE-2025-6020)");

  script_tag(name:"affected", value:"'pam' package(s) on Huawei EulerOS Virtualization release 2.13.0.");

  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 == "EULEROSVIRT-2.13.0") {

  if(!isnull(res = isrpmvuln(pkg:"pam", rpm:"pam~1.5.2~6.h24.eulerosv2r13", rls:"EULEROSVIRT-2.13.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"pam-hsm", rpm:"pam-hsm~1.5.2~6.h24.eulerosv2r13", rls:"EULEROSVIRT-2.13.0"))) {
    report += res;
  }

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

exit(0);