Debian: Security Advisory (DSA-851-1)

# SPDX-FileCopyrightText: 2008 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("1.3.6.1.4.1.25623.1.0.55602");
  script_cve_id("CVE-2005-2531", "CVE-2005-2532", "CVE-2005-2533", "CVE-2005-2534");
  script_tag(name:"creation_date", value:"2008-01-17 22:03:37 +0000 (Thu, 17 Jan 2008)");
  script_version("2024-02-01T14:37:10+0000");
  script_tag(name:"last_modification", value:"2024-02-01 14:37:10 +0000 (Thu, 01 Feb 2024)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");

  script_name("Debian: Security Advisory (DSA-851-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2008 Greenbone AG");
  script_family("Debian Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/debian_linux", "ssh/login/packages", re:"ssh/login/release=DEB3\.1");

  script_xref(name:"Advisory-ID", value:"DSA-851-1");
  script_xref(name:"URL", value:"https://www.debian.org/security/2005/DSA-851-1");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/DSA-851");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'openvpn' package(s) announced via the DSA-851-1 advisory.");

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

  script_tag(name:"insight", value:"Several security related problems have been discovered in openvpn, a Virtual Private Network daemon. The Common Vulnerabilities and Exposures project identifies the following problems:

CAN-2005-2531

Wrong processing of failed certificate authentication when running with 'verb 0' and without TLS authentication can lead to a denial of service by disconnecting the wrong client.

CAN-2005-2532

Wrong handling of packets that can't be decrypted on the server can lead to the disconnection of unrelated clients.

CAN-2005-2533

When running in 'dev tap' Ethernet bridging mode, openvpn can exhaust its memory by receiving a large number of spoofed MAC addresses and hence denying service.

CAN-2005-2534

Simultaneous TCP connections from multiple clients with the same client certificate can cause a denial of service when --duplicate-cn is not enabled.

The old stable distribution (woody) does not contain openvpn packages.

For the stable distribution (sarge) these problems have been fixed in version 2.0-1sarge1.

For the unstable distribution (sid) these problems have been fixed in version 2.0.2-1.

We recommend that you upgrade your openvpn package.");

  script_tag(name:"affected", value:"'openvpn' package(s) on Debian 3.1.");

  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 == "DEB3.1") {

  if(!isnull(res = isdpkgvuln(pkg:"openvpn", ver:"2.0-1sarge1", rls:"DEB3.1"))) {
    report += res;
  }

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

exit(0);