Vulnerabilities > CVE-2017-6139 - Information Exposure Through Log Files vulnerability in F5 Big-Ip Access Policy Manager 12.1.2/13.0.0

047910
CVSS 5.9 - MEDIUM
Attack vector
NETWORK
Attack complexity
HIGH
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
NONE
Availability impact
NONE
network
high complexity
f5
CWE-532
nessus
NVD
Published: 2017-12-21
Updated: 2019-04-12

Summary

In F5 BIG-IP APM software version 13.0.0 and 12.1.2, under rare conditions, the BIG-IP APM system appends log details when responding to client requests. Details in the log file can vary; customers running debug mode logging with BIG-IP APM are at highest risk.

Vulnerable Configurations

Part Description Count
Application
F5
2

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Fuzzing and observing application log data/errors for application mapping
    An attacker sends random, malformed, or otherwise unexpected messages to a target application and observes the application's log or error messages returned. Fuzzing techniques involve sending random or malformed messages to a target and monitoring the target's response. The attacker does not initially know how a target will respond to individual messages but by attempting a large number of message variants they may find a variant that trigger's desired behavior. In this attack, the purpose of the fuzzing is to observe the application's log and error messages, although fuzzing a target can also sometimes cause the target to enter an unstable state, causing a crash. By observing logs and error messages, the attacker can learn details about the configuration of the target application and might be able to cause the target to disclose sensitive information.

Nessus

NASL familyF5 Networks Local Security Checks
NASL idF5_BIGIP_SOL45432295.NASL
descriptionUnder rare conditions, the BIG-IP APM system appends log details when responding to client requests. Details in the log file can vary; customers running debug mode logging with BIG-IP APM are at highest risk. (CVE-2017-6139) Impact A vulnerable BIG-IP APM system may append sensitivelogging information when responding to client requests.
last seen2020-06-01
modified2020-06-02
plugin id118609
published2018-11-02
reporterThis script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/118609
titleF5 Networks BIG-IP : BIG-IP APM logging disclosure vulnerability (K45432295)
code
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from F5 Networks BIG-IP Solution K45432295.
#
# The text description of this plugin is (C) F5 Networks.
#

include("compat.inc");

if (description)
{
  script_id(118609);
  script_version("1.2");
  script_cvs_date("Date: 2019/01/04 10:03:41");

  script_cve_id("CVE-2017-6139");

  script_name(english:"F5 Networks BIG-IP : BIG-IP APM logging disclosure vulnerability (K45432295)");
  script_summary(english:"Checks the BIG-IP version.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote device is missing a vendor-supplied security patch."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Under rare conditions, the BIG-IP APM system appends log details when
responding to client requests. Details in the log file can vary;
customers running debug mode logging with BIG-IP APM are at highest
risk. (CVE-2017-6139)

Impact

A vulnerable BIG-IP APM system may append sensitivelogging information
when responding to client requests."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://support.f5.com/csp/article/K45432295"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade to one of the non-vulnerable versions listed in the F5
Solution K45432295."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N");

  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:f5:big-ip_access_policy_manager");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:f5:big-ip");

  script_set_attribute(attribute:"patch_publication_date", value:"2017/12/20");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/11/02");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"F5 Networks Local Security Checks");

  script_dependencies("f5_bigip_detect.nbin");
  script_require_keys("Host/local_checks_enabled", "Host/BIG-IP/hotfix", "Host/BIG-IP/modules", "Host/BIG-IP/version", "Settings/ParanoidReport");

  exit(0);
}


include("f5_func.inc");

if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
version = get_kb_item("Host/BIG-IP/version");
if ( ! version ) audit(AUDIT_OS_NOT, "F5 Networks BIG-IP");
if ( isnull(get_kb_item("Host/BIG-IP/hotfix")) ) audit(AUDIT_KB_MISSING, "Host/BIG-IP/hotfix");
if ( ! get_kb_item("Host/BIG-IP/modules") ) audit(AUDIT_KB_MISSING, "Host/BIG-IP/modules");

sol = "K45432295";
vmatrix = make_array();

if (report_paranoia < 2) audit(AUDIT_PARANOID);

# APM
vmatrix["APM"] = make_array();
vmatrix["APM"]["affected"  ] = make_list("13.0.0","12.1.1-12.1.2");
vmatrix["APM"]["unaffected"] = make_list("13.1.0","13.0.1","12.1.3");


if (bigip_is_affected(vmatrix:vmatrix, sol:sol))
{
  if (report_verbosity > 0) security_warning(port:0, extra:bigip_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = bigip_get_tested_modules();
  audit_extra = "For BIG-IP module(s) " + tested + ",";
  if (tested) audit(AUDIT_INST_VER_NOT_VULN, audit_extra, version);
  else audit(AUDIT_HOST_NOT, "running the affected module APM");
}

References