Debian: Security Advisory (DSA-2548-1)

# SPDX-FileCopyrightText: 2012 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("1.3.6.1.4.1.25623.1.0.72177");
  script_cve_id("CVE-2012-3518", "CVE-2012-3519", "CVE-2012-4419", "CVE-2012-4922");
  script_tag(name:"creation_date", value:"2012-09-15 08:24:59 +0000 (Sat, 15 Sep 2012)");
  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-2548-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2012 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=DEB6");

  script_xref(name:"Advisory-ID", value:"DSA-2548-1");
  script_xref(name:"URL", value:"https://www.debian.org/security/2012/DSA-2548-1");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/DSA-2548");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'tor' package(s) announced via the DSA-2548-1 advisory.");

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

  script_tag(name:"insight", value:"Several vulnerabilities have been discovered in Tor, an online privacy tool.

CVE-2012-3518

Avoid an uninitialised memory read when reading a vote or consensus document that has an unrecognized flavour name. This could lead to a remote crash, resulting in denial of service.

CVE-2012-3519

Try to leak less information about what relays a client is choosing to a side-channel attacker.

CVE-2012-4419

By providing specially crafted date strings to a victim tor instance, an attacker can cause it to run into an assertion and shut down.

Additionally the update to stable includes the following fixes: when waiting for a client to renegotiate, don't allow it to add any bytes to the input buffer. This fixes a potential DoS issue [tor-5934, tor-6007].

For the stable distribution (squeeze), these problems have been fixed in version 0.2.2.39-1.

For the unstable distribution, these problems have been fixed in version 0.2.3.22-rc-1.

We recommend that you upgrade your tor packages.");

  script_tag(name:"affected", value:"'tor' package(s) on Debian 6.");

  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 == "DEB6") {

  if(!isnull(res = isdpkgvuln(pkg:"tor", ver:"0.2.2.39-1", rls:"DEB6"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"tor-dbg", ver:"0.2.2.39-1", rls:"DEB6"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"tor-geoipdb", ver:"0.2.2.39-1", rls:"DEB6"))) {
    report += res;
  }

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

exit(0);