Huawei EulerOS: Security Advisory for tpm2-tss (EulerOS-SA-2023-1773)

# SPDX-FileCopyrightText: 2023 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("1.3.6.1.4.1.25623.1.1.2.2023.1773");
  script_cve_id("CVE-2023-22745");
  script_tag(name:"creation_date", value:"2023-05-08 04:14:25 +0000 (Mon, 08 May 2023)");
  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:"5.9");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:H/Au:M/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2023-01-26 20:25:23 +0000 (Thu, 26 Jan 2023)");

  script_name("Huawei EulerOS: Security Advisory for tpm2-tss (EulerOS-SA-2023-1773)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2023 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\.0SP11");

  script_xref(name:"Advisory-ID", value:"EulerOS-SA-2023-1773");
  script_xref(name:"URL", value:"https://developer.huaweicloud.com/intl/en-us/euleros/securitydetail.html?secId=EulerOS-SA-2023-1773");

  script_tag(name:"summary", value:"The remote host is missing an update for the Huawei EulerOS 'tpm2-tss' package(s) announced via the EulerOS-SA-2023-1773 advisory.");

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

  script_tag(name:"insight", value:"tpm2-tss is an open source software implementation of the Trusted Computing Group (TCG) Trusted Platform Module (TPM) 2 Software Stack (TSS2). In affected versions `Tss2_RC_SetHandler` and `Tss2_RC_Decode` both index into `layer_handler` with an 8 bit layer number, but the array only has `TPM2_ERROR_TSS2_RC_LAYER_COUNT` entries, so trying to add a handler for higher-numbered layers or decode a response code with such a layer number reads/writes past the end of the buffer. This Buffer overrun, could result in arbitrary code execution. An example attack would be a MiTM bus attack that returns 0xFFFFFFFF for the RC. Given the common use case of TPM modules an attacker must have local access to the target machine with local system privileges which allows access to the TPM system. Usually TPM access requires administrative privilege(CVE-2023-22745)");

  script_tag(name:"affected", value:"'tpm2-tss' package(s) on Huawei EulerOS V2.0SP11.");

  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-2.0SP11") {

  if(!isnull(res = isrpmvuln(pkg:"tpm2-tss", rpm:"tpm2-tss~3.1.0~1.h1.eulerosv2r11", rls:"EULEROS-2.0SP11"))) {
    report += res;
  }

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

exit(0);