Huawei EulerOS: Security Advisory for bash (EulerOS-SA-2020-1343)

# SPDX-FileCopyrightText: 2020 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("1.3.6.1.4.1.25623.1.1.2.2020.1343");
  script_cve_id("CVE-2019-18276");
  script_tag(name:"creation_date", value:"2020-04-01 13:54:19 +0000 (Wed, 01 Apr 2020)");
  script_version("2024-02-05T14:36:56+0000");
  script_tag(name:"last_modification", value:"2024-02-05 14:36:56 +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:L/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-01-22 14:27:39 +0000 (Wed, 22 Jan 2020)");

  script_name("Huawei EulerOS: Security Advisory for bash (EulerOS-SA-2020-1343)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2020 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=EULEROSVIRTARM64\-3\.0\.6\.0");

  script_xref(name:"Advisory-ID", value:"EulerOS-SA-2020-1343");
  script_xref(name:"URL", value:"https://developer.huaweicloud.com/intl/en-us/euleros/securitydetail.html?secId=EulerOS-SA-2020-1343");

  script_tag(name:"summary", value:"The remote host is missing an update for the Huawei EulerOS 'bash' package(s) announced via the EulerOS-SA-2020-1343 advisory.");

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

  script_tag(name:"insight", value:"A privilege escalation vulnerability was found in bash in the way it dropped privileges when started with an effective user id not equal to the real user id. Bash may be vulnerable to this flaw if the setuid permission is set and the owner of the bash program itself is a non-root user. A local attacker could exploit this flaw to escalate their privileges on the system.(CVE-2019-18276)");

  script_tag(name:"affected", value:"'bash' package(s) on Huawei EulerOS Virtualization for ARM 64 3.0.6.0.");

  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 == "EULEROSVIRTARM64-3.0.6.0") {

  if(!isnull(res = isrpmvuln(pkg:"bash", rpm:"bash~4.4.23~5.h8.eulerosv2r8", rls:"EULEROSVIRTARM64-3.0.6.0"))) {
    report += res;
  }

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

exit(0);