Debian: Security Advisory (DLA-323-1)

# SPDX-FileCopyrightText: 2023 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("1.3.6.1.4.1.25623.1.1.1.2.2015.323");
  script_cve_id("CVE-2015-8836", "CVE-2015-8837");
  script_tag(name:"creation_date", value:"2023-03-08 12:56:44 +0000 (Wed, 08 Mar 2023)");
  script_version("2024-02-02T05:06:10+0000");
  script_tag(name:"last_modification", value:"2024-02-02 05:06:10 +0000 (Fri, 02 Feb 2024)");
  script_tag(name:"cvss_base", value:"6.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2016-03-30 15:01:41 +0000 (Wed, 30 Mar 2016)");

  script_name("Debian: Security Advisory (DLA-323-1)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2023 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:"DLA-323-1");
  script_xref(name:"URL", value:"https://www.debian.org/lts/security/2015/DLA-323-1");

  script_tag(name:"summary", value:"The remote host is missing an update for the Debian 'fuseiso' package(s) announced via the DLA-323-1 advisory.");

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

  script_tag(name:"insight", value:"The following two issues have recently been fixed in Debian LTS (squeeze) for the fuseiso package.

Issue 1

An integer overflow, leading to a heap-based buffer overflow flaw was found in the way FuseISO, a FUSE module to mount ISO filesystem images, performed reading of certain ZF blocks of particular inodes. A remote attacker could provide a specially-crafted ISO file that, when mounted via the fuseiso tool would lead to fuseiso binary crash.

This issue was discovered by Florian Weimer of Red Hat Product Security Team.

The issue got resolve by bailing out before ZF blocks that exceed the supported block size of 2^17 are to be read.

Issue 2

A stack-based buffer overflow flaw was found in the way FuseISO, a FUSE module to mount ISO filesystem images, performed expanding of directory portions for absolute path filename entries. A remote attacker could provide a specially-crafted ISO file that, when mounted via fuseiso tool would lead to fuseiso binary crash or, potentially, arbitrary code execution with the privileges of the user running the fuseiso executable.

This issue was discovered by Florian Weimer of Red Hat Product Security Team.

The issue got resolved by checking the resulting length of an absolute path name and by bailing out if the platform's PATH_MAX value gets exceeded.");

  script_tag(name:"affected", value:"'fuseiso' 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:"fuseiso", ver:"20070708-2+deb6u1", rls:"DEB6"))) {
    report += res;
  }

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

exit(0);