Vulnerabilities > CVE-2012-1344 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Cisco IOS 15.1/15.2

047910
CVSS 0.0 - NONE
Attack vector
UNKNOWN
Attack complexity
UNKNOWN
Privileges required
UNKNOWN
Confidentiality impact
UNKNOWN
Integrity impact
UNKNOWN
Availability impact
UNKNOWN
cisco
CWE-119
nessus
NVD
Published: 2012-08-06
Updated: 2013-04-02

Summary

Cisco IOS 15.1 and 15.2, when a clientless SSL VPN is configured, allows remote authenticated users to cause a denial of service (device reload) by using a web browser to refresh the SSL VPN portal page, as demonstrated by the Android browser, aka Bug ID CSCtr86328.

Vulnerable Configurations

Part Description Count
OS
Cisco
2

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Nessus

NASL familyCISCO
NASL idCISCO_IOS_CSCTR86328.NASL
descriptionThe remote Cisco IOS device is configured for clientless SSL VPN. It is, therefore, affected by a denial of service vulnerability due to an unspecified flaw that causes a device reload when using a web browser to refresh the SSL VPN portal page. A remote, authenticated attacker can exploit this to cause a denial of service.
last seen2020-06-01
modified2020-06-02
plugin id61576
published2012-08-17
reporterThis script is Copyright (C) 2012-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
sourcehttps://www.tenable.com/plugins/nessus/61576
titleCisco IOS Clientless SSL VPN DoS
code
#TRUSTED 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
#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(61576);
  script_version("1.11");
  script_cvs_date("Date: 2019/12/04");

  script_cve_id("CVE-2012-1344");
  script_bugtraq_id(54835);
  script_xref(name:"CISCO-BUG-ID", value:"CSCtr86328");

  script_name(english:"Cisco IOS Clientless SSL VPN DoS");
  script_summary(english:"Checks IOS version");

  script_set_attribute(attribute:"synopsis", value:
"The remote device is missing a vendor-supplied security patch.");
  script_set_attribute(attribute:"description", value:
"The remote Cisco IOS device is configured for clientless SSL VPN. It
is, therefore, affected by a denial of service vulnerability due to an 
unspecified flaw that causes a device reload when using a web browser
to refresh the SSL VPN portal page. A remote, authenticated attacker
can exploit this to cause a denial of service.");
  script_set_attribute(attribute:"see_also", value:"https://tools.cisco.com/security/center/viewAlert.x?alertId=26602");
  script_set_attribute(attribute:"solution", value:
"Contact Cisco for updated software.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2012-1344");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2012/08/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2012/08/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2012/08/17");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ios");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CISCO");

  script_copyright(english:"This script is Copyright (C) 2012-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("cisco_ios_version.nasl");
  script_require_keys("Host/Cisco/IOS/Version");

  exit(0);
}

include("audit.inc");
include("cisco_func.inc");
include("cisco_kb_cmd_func.inc");

ver = get_kb_item_or_exit("Host/Cisco/IOS/Version");

flag = 0;

if (ver =='15.1(2)T') flag++;
if (ver =='15.1(2)EY') flag++;
if (ver =='15.1(2)EY1') flag++;
if (ver =='15.1(2)EY1a') flag++;
if (ver =='15.1(2)EY2') flag++;
if (ver =='15.1(2)EY2a') flag++;
if (ver =='15.1(2)EY3') flag++;
if (ver =='15.1(2)EY4') flag++;
if (ver =='15.1(2)GC') flag++;
if (ver =='15.1(2)GC1') flag++;
if (ver =='15.1(2)GC2') flag++;
if (ver =='15.1(4)M') flag++;
if (ver =='15.1(4)M0a') flag++;
if (ver =='15.1(4)M0b') flag++;
if (ver =='15.1(4)M1') flag++;
if (ver =='15.1(4)M2') flag++;
if (ver =='15.1(4)M3') flag++;
if (ver =='15.1(4)M3a') flag++;
if (ver =='15.1(1)MR') flag++;
if (ver =='15.1(1)MR1') flag++;
if (ver =='15.1(1)MR2') flag++;
if (ver =='15.1(1)MR3') flag++;
if (ver =='15.1(1)MR4') flag++;
if (ver =='15.1(3)MR') flag++;
if (ver =='15.1(3)MR1') flag++;
if (ver =='15.1(2)MWR') flag++;
if (ver =='15.1(1)S') flag++;
if (ver =='15.1(1)S1') flag++;
if (ver =='15.1(1)S2') flag++;
if (ver =='15.1(2)S') flag++;
if (ver =='15.1(2)S1') flag++;
if (ver =='15.1(2)S2') flag++;
if (ver =='15.1(3)S') flag++;
if (ver =='15.1(3)S0a') flag++;
if (ver =='15.1(3)S1') flag++;
if (ver =='15.1(3)S2') flag++;
if (ver =='15.1(3)S3') flag++;
if (ver =='15.1(3)S4') flag++;
if (ver =='15.1(1)SA') flag++;
if (ver =='15.1(1)SA1') flag++;
if (ver =='15.1(1)SA2') flag++;
if (ver =='15.1(1)SG') flag++;
if (ver =='15.1(1)SG1') flag++;
if (ver =='15.1(2)SG') flag++;
if (ver =='15.1(2)SNH') flag++;
if (ver =='15.1(2)SNH1') flag++;
if (ver =='15.1(2)SNI') flag++;
if (ver =='15.1(3)SVA') flag++;
if (ver =='15.1(1)SY') flag++;
if (ver =='15.1(1)SY1') flag++;
if (ver =='15.1(1)T') flag++;
if (ver =='15.1(1)T1') flag++;
if (ver =='15.1(1)T2') flag++;
if (ver =='15.1(1)T3') flag++;
if (ver =='15.1(1)T4') flag++;
if (ver =='15.1(1)T5') flag++;
if (ver =='15.1(100)T') flag++;
if (ver =='15.1(2)T0a') flag++;
if (ver =='15.1(2)T1') flag++;
if (ver =='15.1(2)T10') flag++;
if (ver =='15.1(2)T2') flag++;
if (ver =='15.1(2)T2a') flag++;
if (ver =='15.1(2)T3') flag++;
if (ver =='15.1(2)T4') flag++;
if (ver =='15.1(2)T5') flag++;
if (ver =='15.1(3)T') flag++;
if (ver =='15.1(3)T1') flag++;
if (ver =='15.1(3)T2') flag++;
if (ver =='15.1(3)T3') flag++;
if (ver =='15.1(3)T4') flag++;
if (ver =='15.1(4)T') flag++;
if (ver =='15.1(1)XB') flag++;
if (ver =='15.1(1)XB1') flag++;
if (ver =='15.1(1)XB2') flag++;
if (ver =='15.1(1)XB3') flag++;
if (ver =='15.1(4)XB4') flag++;
if (ver =='15.1(4)XB5') flag++;
if (ver =='15.1(4)XB5a') flag++;
if (ver =='15.1(4)XB6') flag++;
if (ver =='15.1(4)XB7') flag++;
if (ver =='15.1(4)XB8') flag++;
if (ver =='15.1(4)XB8a') flag++;
if (ver =='15.2(1)E') flag++;
if (ver =='15.2(1)GC') flag++;
if (ver =='15.2(1)GC1') flag++;
if (ver =='15.2(1)GC2') flag++;
if (ver =='15.2(2)GC') flag++;
if (ver =='15.2(3)GC') flag++;
if (ver =='15.2(2)JA') flag++;
if (ver =='15.2(4)M') flag++;
if (ver =='15.2(4)M0a') flag++;
if (ver =='15.2(4)M1') flag++;
if (ver =='15.2(4)M10') flag++;
if (ver =='15.2(4)M2') flag++;
if (ver =='15.2(4)M3') flag++;
if (ver =='15.2(4)M4') flag++;
if (ver =='15.2(4)M5') flag++;
if (ver =='15.2(4)M6') flag++;
if (ver =='15.2(4)M7') flag++;
if (ver =='15.2(4)M8') flag++;
if (ver =='15.2(4)M9') flag++;
if (ver =='15.2(1)S') flag++;
if (ver =='15.2(1)S1') flag++;
if (ver =='15.2(1)S2') flag++;
if (ver =='15.2(1s)S1') flag++;
if (ver =='15.2(2)S') flag++;
if (ver =='15.2(2)S0a') flag++;
if (ver =='15.2(2)S0b') flag++;
if (ver =='15.2(2)S0c') flag++;
if (ver =='15.2(2)S0d') flag++;
if (ver =='15.2(2)S1') flag++;
if (ver =='15.2(2)S2') flag++;
if (ver =='15.2(3)S') flag++;
if (ver =='15.2(4)S') flag++;
if (ver =='15.2(4)S1') flag++;
if (ver =='15.2(4)S2') flag++;
if (ver =='15.2(4)S3') flag++;
if (ver =='15.2(4)S4') flag++;
if (ver =='15.2(4)S5') flag++;
if (ver =='15.2(4)S6') flag++;
if (ver =='15.2(1)SB') flag++;
if (ver =='15.2(1)SB1') flag++;
if (ver =='15.2(2)SNG') flag++;
if (ver =='15.2(1)T') flag++;
if (ver =='15.2(1)T1') flag++;
if (ver =='15.2(1)T2') flag++;
if (ver =='15.2(1)T3') flag++;
if (ver =='15.2(1)T4') flag++;
if (ver =='15.2(2)T') flag++;
if (ver =='15.2(2)T1') flag++;
if (ver =='15.2(2)T2') flag++;
if (ver =='15.2(2)T3') flag++;
if (ver =='15.2(2)T4') flag++;
if (ver =='15.2(3)T') flag++;
if (ver =='15.2(3)T1') flag++;
if (ver =='15.2(3)T2') flag++;
if (ver =='15.2(3)T3') flag++;
if (ver =='15.2(3)T4') flag++;
if (ver =='15.2(3)XA') flag++;

if (get_kb_item("Host/local_checks_enabled") && flag)
{
  flag = 0;
  buf = cisco_command_kb_item("Host/Cisco/Config/show_running-config", "show running-config");
  if (check_cisco_result(buf))
  {
    if ("webvpn" >< buf) flag = 1;
  }
  else if (cisco_needs_enable(buf))
  {
    flag = 1;
    override = 1;
  }
}

if (flag)
{
  if (report_verbosity > 0)
  {
    report =
      '\n  Cisco bug IDs     : CSCtr86328' +
      '\n  Installed release : ' + ver +
      '\n';
    security_note(port:0, extra:report + cisco_caveat(override));
  }
  else security_note(port:0, extra:cisco_caveat(override));
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

References