Fedora 28 : botan2 (2018-eaa7de17ae)

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Fedora Security Advisory FEDORA-2018-eaa7de17ae.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(120879);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/28");

  script_cve_id("CVE-2018-0495", "CVE-2018-12435");
  script_xref(name:"FEDORA", value:"2018-eaa7de17ae");

  script_name(english:"Fedora 28 : botan2 (2018-eaa7de17ae)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Fedora host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"Update Botan2 to 2.7.0.

Focus of this release is on performance and side channel hardening.

  - Address side channels in RSA key generation and ECDSA
    signing

  - Side channel hardening in many core algorithms (modular
    exponentiation, ECC scalar multiply, Karatsuba
    multiplication, Barrett reduction, etc) to reduce the
    risk of future exploitable side channels.

  - Many optimizations for ECC operations, RSA (including
    key gen), DSA, DH, and XMSS. Typical speedups vs 2.6.0
    is 10 to 40% depending on operation and key size.

  - Add Scrypt password hashing. Also supported is using
    Scrypt to derive keys for private key encryption (format
    compatible with upcoming OpenSSL 1.1.1)

  - Add base32 encoding/decoding

  - Plus many bug fixes and smaller enhancements documented
    in the [release
    notes](https://botan.randombit.net/news.html#version-2-7
    -0-2018-07-02)

Note that Tenable Network Security has extracted the preceding
description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as
possible without introducing additional issues.");
  script_set_attribute(attribute:"see_also", value:"https://bodhi.fedoraproject.org/updates/FEDORA-2018-eaa7de17ae");
  script_set_attribute(attribute:"see_also", value:"https://botan.randombit.net/news.html#version-2-7-0-2018-07-02");
  script_set_attribute(attribute:"solution", value:
"Update the affected botan2 package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:P/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-12435");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/06/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/07/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/01/03");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:botan2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:28");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Fedora Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2019-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/RedHat/release");
if (isnull(release) || "Fedora" >!< release) audit(AUDIT_OS_NOT, "Fedora");
os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Fedora");
os_ver = os_ver[1];
if (! preg(pattern:"^28([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, "Fedora 28", "Fedora " + os_ver);

if (!get_kb_item("Host/RedHat/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);


cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Fedora", cpu);


flag = 0;
if (rpm_check(release:"FC28", reference:"botan2-2.7.0-1.fc28")) flag++;


if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_NOTE,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "botan2");
}