Vulnerabilities > CVE-2017-7519 - Use of Externally-Controlled Format String vulnerability in multiple products

047910
CVSS 4.4 - MEDIUM
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
HIGH
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
HIGH
local
low complexity
ceph
debian
CWE-134
nessus
NVD
Published: 2018-07-27
Updated: 2019-10-09

Summary

In Ceph, a format string flaw was found in the way libradosstriper parses input from user. A user could crash an application or service using the libradosstriper library.

Vulnerable Configurations

Part Description Count
Application
Ceph
1
OS
Debian
1

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Format String Injection
    An attacker includes formatting characters in a string input field on the target application. Most applications assume that users will provide static text and may respond unpredictably to the presence of formatting character. For example, in certain functions of the C programming languages such as printf, the formatting character %s will print the contents of a memory location expecting this location to identify a string and the formatting character %n prints the number of DWORD written in the memory. An attacker can use this to read or write to memory locations or files, or simply to manipulate the value of the resulting text in unexpected ways. Reading or writing memory may result in program crashes and writing memory could result in the execution of arbitrary code if the attacker can write to the program stack.
  • String Format Overflow in syslog()
    This attack targets the format string vulnerabilities in the syslog() function. An attacker would typically inject malicious input in the format string parameter of the syslog function. This is a common problem, and many public vulnerabilities and associated exploits have been posted.

Nessus

NASL familyDebian Local Security Checks
NASL idDEBIAN_DSA-4339.NASL
descriptionMultiple vulnerabilities were discovered in Ceph, a distributed storage and file system: The cephx authentication protocol was suspectible to replay attacks and calculated signatures incorrectly,
last seen2020-06-01
modified2020-06-02
plugin id118939
published2018-11-14
reporterThis script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/118939
titleDebian DSA-4339-1 : ceph - security update
code
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-4339. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(118939);
  script_version("1.1");
  script_cvs_date("Date: 2018/11/14 14:36:20");

  script_cve_id("CVE-2017-7519", "CVE-2018-10861", "CVE-2018-1128", "CVE-2018-1129");
  script_xref(name:"DSA", value:"4339");

  script_name(english:"Debian DSA-4339-1 : ceph - security update");
  script_summary(english:"Checks dpkg output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Multiple vulnerabilities were discovered in Ceph, a distributed
storage and file system: The cephx authentication protocol was
suspectible to replay attacks and calculated signatures incorrectly,
'ceph mon' did not validate capabilities for pool operations
(resulting in potential corruption or deletion of snapshot images) and
a format string vulnerability in libradosstriper could result in
denial of service."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/source-package/ceph"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/stretch/ceph"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2018/dsa-4339"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the ceph packages.

For the stable distribution (stretch), these problems have been fixed
in version 10.2.11-1."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:ceph");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2018/11/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/11/14");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"9.0", prefix:"ceph", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"ceph-base", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"ceph-common", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"ceph-fs-common", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"ceph-fuse", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"ceph-mds", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"ceph-mon", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"ceph-osd", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"ceph-resource-agents", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"ceph-test", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"libcephfs-dev", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"libcephfs-java", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"libcephfs-jni", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"libcephfs1", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"librados-dev", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"librados2", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"libradosstriper-dev", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"libradosstriper1", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"librbd-dev", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"librbd1", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"librgw-dev", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"librgw2", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"python-ceph", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"python-cephfs", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"python-rados", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"python-rbd", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"radosgw", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"rbd-fuse", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"rbd-mirror", reference:"10.2.11-1")) flag++;
if (deb_check(release:"9.0", prefix:"rbd-nbd", reference:"10.2.11-1")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

References