Huawei EulerOS: Security Advisory for perl-Encode (EulerOS-SA-2022-2420)

# SPDX-FileCopyrightText: 2022 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("1.3.6.1.4.1.25623.1.1.2.2022.2420");
  script_cve_id("CVE-2021-36770");
  script_tag(name:"creation_date", value:"2022-10-10 07:55:28 +0000 (Mon, 10 Oct 2022)");
  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:"6.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-08-20 18:53:30 +0000 (Fri, 20 Aug 2021)");

  script_name("Huawei EulerOS: Security Advisory for perl-Encode (EulerOS-SA-2022-2420)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2022 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\.0SP10");

  script_xref(name:"Advisory-ID", value:"EulerOS-SA-2022-2420");
  script_xref(name:"URL", value:"https://developer.huaweicloud.com/intl/en-us/euleros/securitydetail.html?secId=EulerOS-SA-2022-2420");

  script_tag(name:"summary", value:"The remote host is missing an update for the Huawei EulerOS 'perl-Encode' package(s) announced via the EulerOS-SA-2022-2420 advisory.");

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

  script_tag(name:"insight", value:"Encode.pm, as distributed in Perl through 5.34.0, allows local users to gain privileges via a Trojan horse Encode::ConfigLocal library (in the current working directory) that preempts dynamic module loading. Exploitation requires an unusual configuration, and certain 2021 versions of Encode.pm (3.05 through 3.11). This issue occurs because the <pipe><pipe> operator evaluates @INC in a scalar context, and thus @INC has only an integer value.(CVE-2021-36770)");

  script_tag(name:"affected", value:"'perl-Encode' package(s) on Huawei EulerOS V2.0SP10.");

  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-2.0SP10") {

  if(!isnull(res = isrpmvuln(pkg:"perl-Encode", rpm:"perl-Encode~3.06~1.h4.eulerosv2r10", rls:"EULEROS-2.0SP10"))) {
    report += res;
  }

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

exit(0);