Mageia: Security Advisory (MGASA-2021-0300)

# 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("1.3.6.1.4.1.25623.1.1.10.2021.0300");
  script_cve_id("CVE-2021-20305", "CVE-2021-3580");
  script_tag(name:"creation_date", value:"2022-01-28 10:58:44 +0000 (Fri, 28 Jan 2022)");
  script_version("2024-02-02T05:06:09+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:09 +0000 (Fri, 02 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:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-04-12 18:12:37 +0000 (Mon, 12 Apr 2021)");

  script_name("Mageia: Security Advisory (MGASA-2021-0300)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2022 Greenbone AG");
  script_family("Mageia Linux Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/mageia_linux", "ssh/login/release", re:"ssh/login/release=MAGEIA(7|8)");

  script_xref(name:"Advisory-ID", value:"MGASA-2021-0300");
  script_xref(name:"URL", value:"https://advisories.mageia.org/MGASA-2021-0300.html");
  script_xref(name:"URL", value:"https://bugs.mageia.org/show_bug.cgi?id=28800");
  script_xref(name:"URL", value:"https://lists.lysator.liu.se/pipermail/nettle-bugs/2021/009458.html");
  script_xref(name:"URL", value:"https://lists.lysator.liu.se/pipermail/nettle-bugs/2021/009545.html");
  script_xref(name:"URL", value:"https://ubuntu.com/security/notices/USN-4906-1");
  script_xref(name:"URL", value:"https://ubuntu.com/security/notices/USN-4990-1");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'nettle' package(s) announced via the MGASA-2021-0300 advisory.");

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

  script_tag(name:"insight", value:"Remote crash in RSA decryption via manipulated ciphertext (CVE-2021-3580).

A flaw was found in Nettle in versions before 3.7.2, where several Nettle
signature verification functions (GHOST DSA, EDDSA & ECDSA) result in the
Elliptic Curve Cryptography point (ECC) multiply function being called with
out-of-range scalers, possibly resulting in incorrect results. This flaw
allows an attacker to force an invalid signature, causing an assertion
failure or possible validation (CVE-2021-20305).

The Mageia 8 nettle package has been updated to version 3.7.3 and the Mageia 7
nettle package has been patched to fix these issues.");

  script_tag(name:"affected", value:"'nettle' package(s) on Mageia 7, Mageia 8.");

  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 == "MAGEIA7") {

  if(!isnull(res = isrpmvuln(pkg:"lib64hogweed4", rpm:"lib64hogweed4~3.4.1~1.1.mga7", rls:"MAGEIA7"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"lib64nettle-devel", rpm:"lib64nettle-devel~3.4.1~1.1.mga7", rls:"MAGEIA7"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"lib64nettle6", rpm:"lib64nettle6~3.4.1~1.1.mga7", rls:"MAGEIA7"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libhogweed4", rpm:"libhogweed4~3.4.1~1.1.mga7", rls:"MAGEIA7"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libnettle-devel", rpm:"libnettle-devel~3.4.1~1.1.mga7", rls:"MAGEIA7"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libnettle6", rpm:"libnettle6~3.4.1~1.1.mga7", rls:"MAGEIA7"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"nettle", rpm:"nettle~3.4.1~1.1.mga7", rls:"MAGEIA7"))) {
    report += res;
  }

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

if(release == "MAGEIA8") {

  if(!isnull(res = isrpmvuln(pkg:"lib64hogweed6", rpm:"lib64hogweed6~3.7.3~1.mga8", rls:"MAGEIA8"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"lib64nettle-devel", rpm:"lib64nettle-devel~3.7.3~1.mga8", rls:"MAGEIA8"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"lib64nettle8", rpm:"lib64nettle8~3.7.3~1.mga8", rls:"MAGEIA8"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libhogweed6", rpm:"libhogweed6~3.7.3~1.mga8", rls:"MAGEIA8"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libnettle-devel", rpm:"libnettle-devel~3.7.3~1.mga8", rls:"MAGEIA8"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"libnettle8", rpm:"libnettle8~3.7.3~1.mga8", rls:"MAGEIA8"))) {
    report += res;
  }

  if(!isnull(res = isrpmvuln(pkg:"nettle", rpm:"nettle~3.7.3~1.mga8", rls:"MAGEIA8"))) {
    report += res;
  }

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

exit(0);