Huawei EulerOS: Security Advisory for libssh (EulerOS-SA-2025-2437)

# 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("1.3.6.1.4.1.25623.1.1.2.2025.2437");
  script_cve_id("CVE-2025-4877", "CVE-2025-5372");
  script_tag(name:"creation_date", value:"2025-11-21 04:26:30 +0000 (Fri, 21 Nov 2025)");
  script_version("2025-12-03T05:40:19+0000");
  script_tag(name:"last_modification", value:"2025-12-03 05:40:19 +0000 (Wed, 03 Dec 2025)");
  script_tag(name:"cvss_base", value:"9.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/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:"2025-08-22 14:01:21 +0000 (Fri, 22 Aug 2025)");

  script_name("Huawei EulerOS: Security Advisory for libssh (EulerOS-SA-2025-2437)");
  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\.0SP13\-X86_64");

  script_xref(name:"Advisory-ID", value:"EulerOS-SA-2025-2437");
  script_xref(name:"URL", value:"https://developer.huaweicloud.com/intl/en-us/euleros/securitydetail.html?secId=EulerOS-SA-2025-2437");

  script_tag(name:"summary", value:"The remote host is missing an update for the Huawei EulerOS 'libssh' package(s) announced via the EulerOS-SA-2025-2437 advisory.");

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

  script_tag(name:"insight", value:"There's a vulnerability in the libssh package where when a libssh consumer passes in an unexpectedly large input buffer to ssh_get_fingerprint_hash() function. In such cases the bin_to_base64() function can experience an integer overflow leading to a memory under allocation, when that happens it's possible that the program perform out of bounds write leading to a heap corruption.
This issue affects only 32-bits builds of libssh.(CVE-2025-4877)

A vulnerability, which was classified as problematic, was found in libssh up to 0.11.1.This is going to have an impact on confidentiality, integrity, and availability.Upgrading to version 0.11.2 eliminates this vulnerability.(CVE-2025-5372)");

  script_tag(name:"affected", value:"'libssh' package(s) on Huawei EulerOS V2.0SP13(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-2.0SP13-x86_64") {

  if(!isnull(res = isrpmvuln(pkg:"libssh", rpm:"libssh~0.9.6~7.h5.eulerosv2r13", rls:"EULEROS-2.0SP13-x86_64"))) {
    report += res;
  }

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

exit(0);