Ubuntu: Security Advisory (USN-3087-2)

# SPDX-FileCopyrightText: 2016 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("1.3.6.1.4.1.25623.1.0.842898");
  script_cve_id("CVE-2016-2177", "CVE-2016-2178", "CVE-2016-2179", "CVE-2016-2180", "CVE-2016-2181", "CVE-2016-2182", "CVE-2016-2183", "CVE-2016-6302", "CVE-2016-6303", "CVE-2016-6304", "CVE-2016-6306");
  script_tag(name:"creation_date", value:"2016-09-24 03:38:36 +0000 (Sat, 24 Sep 2016)");
  script_version("2024-02-02T05:06:06+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:06 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"7.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/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:"2016-09-27 12:42:02 +0000 (Tue, 27 Sep 2016)");

  script_name("Ubuntu: Security Advisory (USN-3087-2)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2016 Greenbone AG");
  script_family("Ubuntu Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/ubuntu_linux", "ssh/login/packages", re:"ssh/login/release=UBUNTU(12\.04\ LTS|14\.04\ LTS|16\.04\ LTS)");

  script_xref(name:"Advisory-ID", value:"USN-3087-2");
  script_xref(name:"URL", value:"https://ubuntu.com/security/notices/USN-3087-2");
  script_xref(name:"URL", value:"https://launchpad.net/bugs/1626883");

  script_tag(name:"summary", value:"The remote host is missing an update for the 'openssl' package(s) announced via the USN-3087-2 advisory.");

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

  script_tag(name:"insight", value:"USN-3087-1 fixed vulnerabilities in OpenSSL. The fix for CVE-2016-2182 was
incomplete and caused a regression when parsing certificates. This update
fixes the problem.

We apologize for the inconvenience.

Original advisory details:

 Shi Lei discovered that OpenSSL incorrectly handled the OCSP Status Request
 extension. A remote attacker could possibly use this issue to cause memory
 consumption, resulting in a denial of service. (CVE-2016-6304)

 Guido Vranken discovered that OpenSSL used undefined behaviour when
 performing pointer arithmetic. A remote attacker could possibly use this
 issue to cause OpenSSL to crash, resulting in a denial of service. This
 issue has only been addressed in Ubuntu 16.04 LTS in this update.
 (CVE-2016-2177)

 Cesar Pereida, Billy Brumley, and Yuval Yarom discovered that OpenSSL
 did not properly use constant-time operations when performing DSA signing.
 A remote attacker could possibly use this issue to perform a cache-timing
 attack and recover private DSA keys. (CVE-2016-2178)

 Quan Luo discovered that OpenSSL did not properly restrict the lifetime
 of queue entries in the DTLS implementation. A remote attacker could
 possibly use this issue to consume memory, resulting in a denial of
 service. (CVE-2016-2179)

 Shi Lei discovered that OpenSSL incorrectly handled memory in the
 TS_OBJ_print_bio() function. A remote attacker could possibly use this
 issue to cause a denial of service. (CVE-2016-2180)

 It was discovered that the OpenSSL incorrectly handled the DTLS anti-replay
 feature. A remote attacker could possibly use this issue to cause a denial
 of service. (CVE-2016-2181)

 Shi Lei discovered that OpenSSL incorrectly validated division results. A
 remote attacker could possibly use this issue to cause a denial of service.
 (CVE-2016-2182)

 Karthik Bhargavan and Gaetan Leurent discovered that the DES and Triple DES
 ciphers were vulnerable to birthday attacks. A remote attacker could
 possibly use this flaw to obtain clear text data from long encrypted
 sessions. This update moves DES from the HIGH cipher list to MEDIUM.
 (CVE-2016-2183)

 Shi Lei discovered that OpenSSL incorrectly handled certain ticket lengths.
 A remote attacker could use this issue to cause a denial of service.
 (CVE-2016-6302)

 Shi Lei discovered that OpenSSL incorrectly handled memory in the
 MDC2_Update() function. A remote attacker could possibly use this issue to
 cause a denial of service. (CVE-2016-6303)

 Shi Lei discovered that OpenSSL incorrectly performed certain message
 length checks. A remote attacker could possibly use this issue to cause a
 denial of service. (CVE-2016-6306)");

  script_tag(name:"affected", value:"'openssl' package(s) on Ubuntu 12.04, Ubuntu 14.04, Ubuntu 16.04.");

  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-deb.inc");

release = dpkg_get_ssh_release();
if(!release)
  exit(0);

res = "";
report = "";

if(release == "UBUNTU12.04 LTS") {

  if(!isnull(res = isdpkgvuln(pkg:"libssl1.0.0", ver:"1.0.1-4ubuntu5.38", rls:"UBUNTU12.04 LTS"))) {
    report += res;
  }

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

if(release == "UBUNTU14.04 LTS") {

  if(!isnull(res = isdpkgvuln(pkg:"libssl1.0.0", ver:"1.0.1f-1ubuntu2.21", rls:"UBUNTU14.04 LTS"))) {
    report += res;
  }

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

if(release == "UBUNTU16.04 LTS") {

  if(!isnull(res = isdpkgvuln(pkg:"libssl1.0.0", ver:"1.0.2g-1ubuntu4.5", rls:"UBUNTU16.04 LTS"))) {
    report += res;
  }

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

exit(0);