Debian DLA-2020-1 : libonig security update

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-2020-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(131705);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/05");

  script_cve_id("CVE-2019-19012", "CVE-2019-19204", "CVE-2019-19246");

  script_name(english:"Debian DLA-2020-1 : libonig security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"Several vulnerabilities were discovered in the Oniguruma regular
expressions library, notably used in PHP mbstring.

CVE-2019-19012

An integer overflow in the search_in_range function in regexec.c leads
to an out-of-bounds read, in which the offset of this read is under
the control of an attacker. (This only affects the 32-bit compiled
version). Remote attackers can cause a denial of service or
information disclosure, or possibly have unspecified other impact, via
a crafted regular expression.

CVE-2019-19204

In the function fetch_range_quantifier in regparse.c, PFETCH is called
without checking PEND. This leads to a heap-based buffer over-read and
lead to denial of service via a crafted regular expression.

CVE-2019-19246

Heap-based buffer over-read in str_lower_case_match in regexec.c can
lead to denial of service via a crafted regular expression.

For Debian 8 'Jessie', these problems have been fixed in version
5.9.5-3.2+deb8u4.

We recommend that you upgrade your libonig packages.

NOTE: Tenable Network Security has extracted the preceding description
block directly from the DLA security advisory. 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://lists.debian.org/debian-lts-announce/2019/12/msg00002.html");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/jessie/libonig");
  script_set_attribute(attribute:"solution", value:
"Upgrade the affected libonig-dev, libonig2, and libonig2-dbg packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-19012");

  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:"2019/11/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/12/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/12/05");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libonig-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libonig2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libonig2-dbg");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:8.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Debian 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/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"8.0", prefix:"libonig-dev", reference:"5.9.5-3.2+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"libonig2", reference:"5.9.5-3.2+deb8u4")) flag++;
if (deb_check(release:"8.0", prefix:"libonig2-dbg", reference:"5.9.5-3.2+deb8u4")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");