Debian DLA-2565-1 : openssl1.0 security update

2021-02-19T00:00:00
ID DEBIAN_DLA-2565.NASL
Type nessus
Reporter This script is Copyright (C) 2021 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2021-02-19T00:00:00

Description

It was discovered that there were two issues in the 1.0 branch of the OpenSSL cryptographic system :

  • CVE-2021-23840: Prevent an issue where 'Digital EnVeloPe' EVP-related calls could cause applications to behave incorrectly or even crash.

  • CVE-2021-23841: Prevent an issue in the X509 certificate handling caused by the lack of error handling whilst parsing 'issuer' fields.

For Debian 9 'Stretch', these problems have been fixed in version 1.0.2u-1~deb9u4. For the equivalent changes for the 1.1 branch of OpenSSL, please see DLA-2563-1.

We recommend that you upgrade your openssl1.0 packages.

For the detailed security status of openssl1.0 please refer to its security tracker page at: https://security-tracker.debian.org/tracker/openssl1.0

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.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DLA-2565-1. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(146604);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/02/19");

  script_name(english:"Debian DLA-2565-1 : openssl1.0 security update");
  script_summary(english:"Checks dpkg output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis",
    value:"The remote Debian host is missing a security update."
  );
  script_set_attribute(
    attribute:"description",
    value:
"It was discovered that there were two issues in the 1.0 branch of the
OpenSSL cryptographic system :

  - CVE-2021-23840: Prevent an issue where 'Digital
    EnVeloPe' EVP-related calls could cause applications to
    behave incorrectly or even crash.

  - CVE-2021-23841: Prevent an issue in the X509 certificate
    handling caused by the lack of error handling whilst
    parsing 'issuer' fields.

For Debian 9 'Stretch', these problems have been fixed in version
1.0.2u-1~deb9u4. For the equivalent changes for the 1.1 branch of
OpenSSL, please see DLA-2563-1.

We recommend that you upgrade your openssl1.0 packages.

For the detailed security status of openssl1.0 please refer to its
security tracker page at:
https://security-tracker.debian.org/tracker/openssl1.0

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/2021/02/msg00025.html"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/stretch/openssl1.0"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/source-package/openssl1.0"
  );
  script_set_attribute(
    attribute:"solution",
    value:"Upgrade the affected libssl1.0-dev, and libssl1.0.2 packages."
  );
  script_set_attribute(attribute:"risk_factor", value:"High");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libssl1.0-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libssl1.0.2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/02/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/02/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/02/19");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  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:"libssl1.0-dev", reference:"1.0.2u-1~deb9u4")) flag++;
if (deb_check(release:"9.0", prefix:"libssl1.0.2", reference:"1.0.2u-1~deb9u4")) 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");