Huawei EulerOS: Security Advisory for nss (EulerOS-SA-2021-1744)

# SPDX-FileCopyrightText: 2021 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("1.3.6.1.4.1.25623.1.1.2.2021.1744");
  script_cve_id("CVE-2020-12401", "CVE-2020-12402");
  script_tag(name:"creation_date", value:"2021-04-13 06:15:59 +0000 (Tue, 13 Apr 2021)");
  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:"1.9");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:M/Au:N/C:P/I:N/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-10-26 16:05:51 +0000 (Mon, 26 Oct 2020)");

  script_name("Huawei EulerOS: Security Advisory for nss (EulerOS-SA-2021-1744)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2021 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\.9\.0");

  script_xref(name:"Advisory-ID", value:"EulerOS-SA-2021-1744");
  script_xref(name:"URL", value:"https://developer.huaweicloud.com/intl/en-us/euleros/securitydetail.html?secId=EulerOS-SA-2021-1744");

  script_tag(name:"summary", value:"The remote host is missing an update for the Huawei EulerOS 'nss' package(s) announced via the EulerOS-SA-2021-1744 advisory.");

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

  script_tag(name:"insight", value:"During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean Algorithm which entailed significantly input-dependent flow. This allowed an attacker able to perform electromagnetic-based side channel attacks to record traces leading to the recovery of the secret primes. *Note:* An unmodified Firefox browser does not generate RSA keys in normal operation and is not affected, but products built on top of it might.(CVE-2020-12402)

A flaw was found in nss. Using the EM side-channel, it is possible to extract the position of zero and non-zero wNAF digits while nss-certutil tool performs scalar multiplication during the ECDSA signature generation, leaking partial information about the ECDSA nonce. Given a small number of ECDSA signatures, this information can be used to steal the private key. The highest threat from this vulnerability is to data confidentiality.(CVE-2020-12401)");

  script_tag(name:"affected", value:"'nss' package(s) on Huawei EulerOS Virtualization release 2.9.0.");

  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-2.9.0") {

  if(!isnull(res = isrpmvuln(pkg:"nss", rpm:"nss~3.40.1~11.h11.eulerosv2r9", rls:"EULEROSVIRT-2.9.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"nss-softokn", rpm:"nss-softokn~3.40.1~11.h11.eulerosv2r9", rls:"EULEROSVIRT-2.9.0"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"nss-util", rpm:"nss-util~3.40.1~11.h11.eulerosv2r9", rls:"EULEROSVIRT-2.9.0"))) {
    report += res;
  }

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

exit(0);