Debian DLA-2365-1 : netty-3.9 security update

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-2365-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(140296);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/21");

  script_cve_id("CVE-2019-16869", "CVE-2019-20444", "CVE-2019-20445");

  script_name(english:"Debian DLA-2365-1 : netty-3.9 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 have been discovered in netty-3.9, a Java NIO
client/server socket framework.

CVE-2019-16869

Netty before 4.1.42.Final mishandles whitespace before the colon in
HTTP headers (such as a 'Transfer-Encoding : chunked' line), which
leads to HTTP request smuggling.

CVE-2019-20444

HttpObjectDecoder.java in Netty before 4.1.44 allows an HTTP header
that lacks a colon, which might be interpreted as a separate header
with an incorrect syntax, or might be interpreted as an 'invalid
fold.'

CVE-2019-20445

HttpObjectDecoder.java in Netty before 4.1.44 allows a Content-Length
header to be accompanied by a second Content-Length header, or by a
Transfer-Encoding header.

For Debian 9 stretch, these problems have been fixed in version
3.9.9.Final-1+deb9u1.

We recommend that you upgrade your netty-3.9 packages.

For the detailed security status of netty-3.9 please refer to its
security tracker page at:
https://security-tracker.debian.org/tracker/netty-3.9

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/2020/09/msg00004.html");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/stretch/netty-3.9");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/netty-3.9");
  script_set_attribute(attribute:"solution", value:
"Upgrade the affected libnetty-3.9-java package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N");
  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:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-20445");

  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:"2019/09/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/09/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/09/08");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libnetty-3.9-java");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
  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) 2020-2024 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:"9.0", prefix:"libnetty-3.9-java", reference:"3.9.9.Final-1+deb9u1")) flag++;

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