Debian: Security Advisory (DSA-3653-2)

# 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("1.3.6.1.4.1.25623.1.0.703653");
  script_cve_id("CVE-2016-6354");
  script_tag(name:"creation_date", value:"2016-08-24 22:00:00 +0000 (Wed, 24 Aug 2016)");
  script_version("2024-02-02T05:06:05+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:05 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"7.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.0/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:"2016-09-22 00:58:06 +0000 (Thu, 22 Sep 2016)");

  script_name("Debian: Security Advisory (DSA-3653-2)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2016 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=DEB8");

  script_xref(name:"Advisory-ID", value:"DSA-3653-2");
  script_xref(name:"URL", value:"https://www.debian.org/security/2016/DSA-3653-2");
  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/DSA-3653");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'flex' package(s) announced via the DSA-3653-2 advisory.");

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

  script_tag(name:"insight", value:"Alexander Sulfrian discovered a buffer overflow in the yy_get_next_buffer() function generated by Flex, which may result in denial of service and potentially the execution of code if operating on data from untrusted sources.

Affected applications need to be rebuild. bogofilter will be rebuild against the updated flex in a followup update. Further affected applications should be reported at the bug referenced above.

For the stable distribution (jessie), this problem has been fixed in version 2.5.39-8+deb8u1.

For the testing distribution (stretch), this problem has been fixed in version 2.6.1-1.

For the unstable distribution (sid), this problem has been fixed in version 2.6.1-1.

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

  script_tag(name:"affected", value:"'flex' package(s) on Debian 8.");

  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 == "DEB8") {

  if(!isnull(res = isdpkgvuln(pkg:"flex", ver:"2.5.39-8+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"flex-doc", ver:"2.5.39-8+deb8u2", rls:"DEB8"))) {
    report += res;
  }

  if(!isnull(res = isdpkgvuln(pkg:"libfl-dev", ver:"2.5.39-8+deb8u2", rls:"DEB8"))) {
    report += res;
  }

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

exit(0);