Vulnerabilities > CVE-2009-0628 - Information Exposure vulnerability in Cisco IOS 12.3/12.4

047910
CVSS 9.0 - CRITICAL
Attack vector
NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
PARTIAL
Integrity impact
PARTIAL
Availability impact
COMPLETE
network
low complexity
cisco
CWE-200
critical
nessus
NVD
Published: 2009-03-27
Updated: 2017-09-29

Summary

Memory leak in the SSLVPN feature in Cisco IOS 12.3 through 12.4 allows remote attackers to cause a denial of service (memory consumption and device crash) by disconnecting an SSL session in an abnormal manner, leading to a Transmission Control Block (TCB) leak.

Vulnerable Configurations

Part Description Count
OS
Cisco
67

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Subverting Environment Variable Values
    The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.
  • Footprinting
    An attacker engages in probing and exploration activity to identify constituents and properties of the target. Footprinting is a general term to describe a variety of information gathering techniques, often used by attackers in preparation for some attack. It consists of using tools to learn as much as possible about the composition, configuration, and security mechanisms of the targeted application, system or network. Information that might be collected during a footprinting effort could include open ports, applications and their versions, network topology, and similar information. While footprinting is not intended to be damaging (although certain activities, such as network scans, can sometimes cause disruptions to vulnerable applications inadvertently) it may often pave the way for more damaging attacks.
  • Exploiting Trust in Client (aka Make the Client Invisible)
    An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
  • Browser Fingerprinting
    An attacker carefully crafts small snippets of Java Script to efficiently detect the type of browser the potential victim is using. Many web-based attacks need prior knowledge of the web browser including the version of browser to ensure successful exploitation of a vulnerability. Having this knowledge allows an attacker to target the victim with attacks that specifically exploit known or zero day weaknesses in the type and version of the browser used by the victim. Automating this process via Java Script as a part of the same delivery system used to exploit the browser is considered more efficient as the attacker can supply a browser fingerprinting method and integrate it with exploit code, all contained in Java Script and in response to the same web page request by the browser.
  • Session Credential Falsification through Prediction
    This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.

Nessus

NASL familyCISCO
NASL idCISCO-SA-20090325-WEBVPNHTTP.NASL
descriptionCisco IOS software contains two vulnerabilities within the Cisco IOS WebVPN or Cisco IOS SSLVPN feature (SSLVPN) that can be remotely exploited without authentication to cause a denial of service condition. Both vulnerabilities affect both Cisco IOS WebVPN and Cisco IOS SSLVPN features: - Crafted HTTPS packet will crash device. (CVE-2009-0626) - SSLVPN sessions cause a memory leak in the device. (CVE-2009-0628) Cisco has released free software updates that address these vulnerabilities. There are no workarounds that mitigate these vulnerabilities.
last seen2020-03-17
modified2010-09-01
plugin id49036
published2010-09-01
reporterThis script is (C) 2010-2018 Tenable Network Security, Inc.
sourcehttps://www.tenable.com/plugins/nessus/49036
titleCisco IOS Software WebVPN and SSLVPN Vulnerabilities - Cisco Systems
code
#TRUSTED 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
#
# (C) Tenable Network Security, Inc.
#
# Security advisory is (C) CISCO, Inc.
# See https://www.cisco.com/en/US/products/products_security_advisory09186a0080a96c1f.shtml

if (NASL_LEVEL < 3000) exit(0);

include("compat.inc");

if (description)
{
 script_id(49036);
 script_version("1.21");
 script_set_attribute(attribute:"plugin_modification_date", value:"2018/11/15");
 script_cve_id("CVE-2009-0626", "CVE-2009-0628");
 script_bugtraq_id(34239);
 script_xref(name:"CISCO-BUG-ID", value:"CSCsk62253");
 script_xref(name:"CISCO-BUG-ID", value:"CSCsw24700");
 script_xref(name:"CISCO-SA", value:"cisco-sa-20090325-webvpn");
 script_name(english:"Cisco IOS Software WebVPN and SSLVPN Vulnerabilities - Cisco Systems");
 script_summary(english:"Checks the IOS version.");
 script_set_attribute(attribute:"synopsis", value:"The remote device is missing a vendor-supplied security patch.");
 script_set_attribute(attribute:"description", value:
'Cisco IOS software contains two vulnerabilities within the Cisco IOS
WebVPN or Cisco IOS SSLVPN feature (SSLVPN) that can be remotely
exploited without authentication to cause a denial of service
condition. Both vulnerabilities affect both Cisco IOS WebVPN and Cisco
IOS SSLVPN features:

  - Crafted HTTPS packet will crash device.
    (CVE-2009-0626)

  - SSLVPN sessions cause a memory leak in the device.
    (CVE-2009-0628)

Cisco has released free software updates that address these
vulnerabilities.
There are no workarounds that mitigate these vulnerabilities.
');
 script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?604ac742");
 # https://www.cisco.com/en/US/products/products_security_advisory09186a0080a96c1f.shtml
 script_set_attribute(attribute:"see_also", value: "http://www.nessus.org/u?a91cd0e5");
 script_set_attribute(attribute:"solution", value:
"Apply the relevant patch referenced in Cisco Security Advisory
cisco-sa-20090325-webvpn.");
 script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
 script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
 script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
 script_set_attribute(attribute:"exploit_available", value:"false");
 script_cwe_id(200);
 script_set_attribute(attribute:"plugin_type", value:"combined");
 script_set_attribute(attribute:"cpe", value:"cpe:/o:cisco:ios");

 script_set_attribute(attribute:"vuln_publication_date", value:"2009/03/25");
 script_set_attribute(attribute:"patch_publication_date", value:"2009/03/25");
 script_set_attribute(attribute:"plugin_publication_date", value:"2010/09/01");

 script_end_attributes();
 script_category(ACT_GATHER_INFO);
 script_copyright(english:"This script is (C) 2010-2018 Tenable Network Security, Inc.");
 script_family(english:"CISCO");
 script_dependencie("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");

flag = 0;
override = 0;
version = get_kb_item_or_exit("Host/Cisco/IOS/Version");

if (version == '12.4(15)XZ') flag++;
else if (version == '12.4(15)XY3') flag++;
else if (version == '12.4(15)XY2') flag++;
else if (version == '12.4(15)XY1') flag++;
else if (version == '12.4(15)XY') flag++;
else if (version == '12.4(11)XW9') flag++;
else if (version == '12.4(11)XW8') flag++;
else if (version == '12.4(11)XW7') flag++;
else if (version == '12.4(11)XW6') flag++;
else if (version == '12.4(11)XW5') flag++;
else if (version == '12.4(11)XW4') flag++;
else if (version == '12.4(11)XW3') flag++;
else if (version == '12.4(11)XW2') flag++;
else if (version == '12.4(11)XW1') flag++;
else if (version == '12.4(11)XW') flag++;
else if (version == '12.4(11)XV1') flag++;
else if (version == '12.4(11)XV') flag++;
else if (version == '12.4(6)XT2') flag++;
else if (version == '12.4(6)XT1') flag++;
else if (version == '12.4(6)XT') flag++;
else if (version == '12.4(6)XP') flag++;
else if (version == '12.4(11)XJ4') flag++;
else if (version == '12.4(11)XJ3') flag++;
else if (version == '12.4(11)XJ2') flag++;
else if (version == '12.4(11)XJ') flag++;
else if (version == '12.4(6)XE3') flag++;
else if (version == '12.4(6)XE2') flag++;
else if (version == '12.4(6)XE1') flag++;
else if (version == '12.4(6)XE') flag++;
else if (version == '12.4(4)XD9') flag++;
else if (version == '12.4(4)XD8') flag++;
else if (version == '12.4(4)XD7') flag++;
else if (version == '12.4(4)XD5') flag++;
else if (version == '12.4(4)XD4') flag++;
else if (version == '12.4(4)XD2') flag++;
else if (version == '12.4(4)XD11') flag++;
else if (version == '12.4(4)XD10') flag++;
else if (version == '12.4(4)XD1') flag++;
else if (version == '12.4(4)XD') flag++;
else if (version == '12.4(4)XC7') flag++;
else if (version == '12.4(4)XC6') flag++;
else if (version == '12.4(4)XC5') flag++;
else if (version == '12.4(4)XC4') flag++;
else if (version == '12.4(4)XC3') flag++;
else if (version == '12.4(4)XC2') flag++;
else if (version == '12.4(4)XC1') flag++;
else if (version == '12.4(4)XC') flag++;
else if (version == '12.4(2)XB9') flag++;
else if (version == '12.4(2)XB8') flag++;
else if (version == '12.4(2)XB7') flag++;
else if (version == '12.4(2)XB6') flag++;
else if (version == '12.4(2)XB5') flag++;
else if (version == '12.4(2)XB4') flag++;
else if (version == '12.4(2)XB3') flag++;
else if (version == '12.4(2)XB2') flag++;
else if (version == '12.4(2)XB10') flag++;
else if (version == '12.4(2)XB1') flag++;
else if (version == '12.4(2)XB') flag++;
else if (version == '12.4(2)XA2') flag++;
else if (version == '12.4(2)XA1') flag++;
else if (version == '12.4(2)XA') flag++;
else if (version == '12.4(15)T6') flag++;
else if (version == '12.4(15)T5') flag++;
else if (version == '12.4(15)T4') flag++;
else if (version == '12.4(15)T3') flag++;
else if (version == '12.4(15)T2') flag++;
else if (version == '12.4(15)T1') flag++;
else if (version == '12.4(15)T') flag++;
else if (version == '12.4(11)T4') flag++;
else if (version == '12.4(11)T3') flag++;
else if (version == '12.4(11)T2') flag++;
else if (version == '12.4(11)T1') flag++;
else if (version == '12.4(11)T') flag++;
else if (version == '12.4(9)T7') flag++;
else if (version == '12.4(9)T6') flag++;
else if (version == '12.4(9)T5') flag++;
else if (version == '12.4(9)T4') flag++;
else if (version == '12.4(9)T3') flag++;
else if (version == '12.4(9)T2') flag++;
else if (version == '12.4(9)T1') flag++;
else if (version == '12.4(9)T') flag++;
else if (version == '12.4(6)T9') flag++;
else if (version == '12.4(6)T8') flag++;
else if (version == '12.4(6)T7') flag++;
else if (version == '12.4(6)T6') flag++;
else if (version == '12.4(6)T5') flag++;
else if (version == '12.4(6)T4') flag++;
else if (version == '12.4(6)T3') flag++;
else if (version == '12.4(6)T2') flag++;
else if (version == '12.4(6)T11') flag++;
else if (version == '12.4(6)T10') flag++;
else if (version == '12.4(6)T1') flag++;
else if (version == '12.4(6)T') flag++;
else if (version == '12.4(4)T8') flag++;
else if (version == '12.4(4)T7') flag++;
else if (version == '12.4(4)T6') flag++;
else if (version == '12.4(4)T5') flag++;
else if (version == '12.4(4)T4') flag++;
else if (version == '12.4(4)T3') flag++;
else if (version == '12.4(4)T2') flag++;
else if (version == '12.4(4)T1') flag++;
else if (version == '12.4(4)T') flag++;
else if (version == '12.4(2)T6') flag++;
else if (version == '12.4(2)T5') flag++;
else if (version == '12.4(2)T4') flag++;
else if (version == '12.4(2)T3') flag++;
else if (version == '12.4(2)T2') flag++;
else if (version == '12.4(2)T1') flag++;
else if (version == '12.4(2)T') flag++;
else if (version == '12.4(16)MR2') flag++;
else if (version == '12.4(16)MR1') flag++;
else if (version == '12.4(23)') flag++;
else if (version == '12.4(21a)') flag++;
else if (version == '12.4(21)') flag++;
else if (version == '12.4(19b)') flag++;
else if (version == '12.4(19a)') flag++;
else if (version == '12.4(19)') flag++;
else if (version == '12.4(18c)') flag++;
else if (version == '12.4(18b)') flag++;
else if (version == '12.4(18a)') flag++;
else if (version == '12.4(18)') flag++;
else if (version == '12.4(17b)') flag++;
else if (version == '12.4(17a)') flag++;
else if (version == '12.4(17)') flag++;
else if (version == '12.4(16b)') flag++;
else if (version == '12.4(16a)') flag++;
else if (version == '12.4(16)') flag++;
else if (version == '12.4(13f)') flag++;
else if (version == '12.4(13e)') flag++;
else if (version == '12.4(13d)') flag++;
else if (version == '12.4(13c)') flag++;
else if (version == '12.4(13b)') flag++;
else if (version == '12.4(13a)') flag++;
else if (version == '12.4(13)') flag++;
else if (version == '12.4(12c)') flag++;
else if (version == '12.4(12b)') flag++;
else if (version == '12.4(12a)') flag++;
else if (version == '12.4(12)') flag++;
else if (version == '12.4(10c)') flag++;
else if (version == '12.4(10b)') flag++;
else if (version == '12.4(10a)') flag++;
else if (version == '12.4(10)') flag++;
else if (version == '12.4(8d)') flag++;
else if (version == '12.4(8c)') flag++;
else if (version == '12.4(8b)') flag++;
else if (version == '12.4(8a)') flag++;
else if (version == '12.4(8)') flag++;
else if (version == '12.4(7h)') flag++;
else if (version == '12.4(7g)') flag++;
else if (version == '12.4(7f)') flag++;
else if (version == '12.4(7e)') flag++;
else if (version == '12.4(7d)') flag++;
else if (version == '12.4(7c)') flag++;
else if (version == '12.4(7b)') flag++;
else if (version == '12.4(7a)') flag++;
else if (version == '12.4(7)') flag++;
else if (version == '12.4(5c)') flag++;
else if (version == '12.4(5b)') flag++;
else if (version == '12.4(5a)') flag++;
else if (version == '12.4(5)') flag++;
else if (version == '12.4(3j)') flag++;
else if (version == '12.4(3i)') flag++;
else if (version == '12.4(3h)') flag++;
else if (version == '12.4(3g)') flag++;
else if (version == '12.4(3f)') flag++;
else if (version == '12.4(3e)') flag++;
else if (version == '12.4(3d)') flag++;
else if (version == '12.4(3c)') flag++;
else if (version == '12.4(3b)') flag++;
else if (version == '12.4(3a)') flag++;
else if (version == '12.4(3)') flag++;
else if (version == '12.4(1c)') flag++;
else if (version == '12.4(1b)') flag++;
else if (version == '12.4(1a)') flag++;
else if (version == '12.4(1)') flag++;
else if (version == '12.3(14)YU1') flag++;
else if (version == '12.3(14)YU') flag++;
else if (version == '12.3(14)YT1') flag++;
else if (version == '12.3(14)YT') flag++;
else if (version == '12.3(11)YS2') flag++;
else if (version == '12.3(14)YQ8') flag++;
else if (version == '12.3(14)YQ7') flag++;
else if (version == '12.3(14)YQ6') flag++;
else if (version == '12.3(14)YQ5') flag++;
else if (version == '12.3(14)YQ4') flag++;
else if (version == '12.3(14)YQ3') flag++;
else if (version == '12.3(14)YQ2') flag++;
else if (version == '12.3(14)YQ1') flag++;
else if (version == '12.3(14)YQ') flag++;
else if (version == '12.3(11)YK2') flag++;
else if (version == '12.3(11)YK1') flag++;
else if (version == '12.3(11)YK') flag++;
else if (version == '12.3(14)T7') flag++;
else if (version == '12.3(14)T6') flag++;
else if (version == '12.3(14)T5') flag++;
else if (version == '12.3(14)T3') flag++;
else if (version == '12.3(14)T2') flag++;
else if (version == '12.3(14)T1') flag++;
else if (version == '12.3(14)T') flag++;


if (get_kb_item("Host/local_checks_enabled"))
{
  if (flag)
  {
    flag = 0;
    buf = cisco_command_kb_item("Host/Cisco/Config/show_running-config", "show running-config");
    if (check_cisco_result(buf))
    {
      m = eregmatch(pattern:"webvpn gateway([^!]+)!", string:buf);
      if ( (!isnull(m)) && ("inservice" >< m[1]) && ("ssl" >< m[1]) ) { flag = 1; }
    } else if (cisco_needs_enable(buf)) { flag = 1; override = 1; }
  }
}


if (flag)
{
  security_hole(port:0, extra:cisco_caveat(override));
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

Oval

accepted2011-05-09T04:00:23.855-04:00
classvulnerability
contributors
nameKASHIF LATIF
organizationDTCC
descriptionMemory leak in the SSLVPN feature in Cisco IOS 12.3 through 12.4 allows remote attackers to cause a denial of service (memory consumption and device crash) by disconnecting an SSL session in an abnormal manner, leading to a Transmission Control Block (TCB) leak.
familyios
idoval:org.mitre.oval:def:12092
statusaccepted
submitted2010-05-12T12:00:00.000-04:00
titleCisco IOS Memory leak in the SSLVPN
version7

Seebug

bulletinFamilyexploit
descriptionBUGTRAQ ID: 34239 CVE(CAN) ID: CVE-2009-0628,CVE-2009-0627 Cisco IOS是思科网络设备所使用的互联网操作系统。 Cisco SSLVPN功能是增强版本的WebVPN功能，允许Internet中任意位置的用户远程访问企业站点。 如果接收到了特制的HPPTS报文，配置了SSLVPN功能的设备可能重载或挂起。必须完成SSLVPN功能相关TCP端口的三重握手才可以成功利用这个漏洞，但无需认证。SSLVPN默认的TCP端口号为443。 配置了SSLVPN的设备在处理异常断开的SSL会话时可能泄露TCB，持续攻击可能导致设备耗尽内存资源而崩溃。无需认证便可利用这个漏洞。 Cisco IOS 12.4 Cisco IOS 12.3 厂商补丁： Cisco ----- Cisco已经为此发布了一个安全公告（cisco-sa-20090325-webvpn）以及相应补丁: cisco-sa-20090325-webvpn：Cisco IOS Software WebVPN and SSLVPN Vulnerabilities 链接：<a href=http://www.cisco.com/warp/public/707/cisco-sa-20090325-webvpn.shtml target=_blank rel=external nofollow>http://www.cisco.com/warp/public/707/cisco-sa-20090325-webvpn.shtml</a>
idSSV:4963
last seen2017-11-19
modified2009-03-28
published2009-03-28
reporterRoot
titleCisco IOS WebVPN/SSLVPN远程拒绝服务漏洞

References