Vulnerabilities > CVE-2012-0723 - Improper Input Validation vulnerability in IBM AIX and Vios

047910
CVSS 4.9 - MEDIUM
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
COMPLETE
local
low complexity
ibm
CWE-20
nessus

Summary

The kernel in IBM AIX 5.3, 6.1, and 7.1, and VIOS 2.2.1.4-FP-25 SP-02, does not properly implement the dupmsg system call, which allows local users to cause a denial of service (system crash) via a crafted application.

Vulnerable Configurations

Part Description Count
OS
Ibm
3
Application
Ibm
1

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.
  • Server Side Include (SSI) Injection
    An attacker can use Server Side Include (SSI) Injection to send code to a web application that then gets executed by the web server. Doing so enables the attacker to achieve similar results to Cross Site Scripting, viz., arbitrary code execution and information disclosure, albeit on a more limited scale, since the SSI directives are nowhere near as powerful as a full-fledged scripting language. Nonetheless, the attacker can conveniently gain access to sensitive files, such as password files, and execute shell commands.
  • Cross Zone Scripting
    An attacker is able to cause a victim to load content into their web-browser that bypasses security zone controls and gain access to increased privileges to execute scripting code or other web objects such as unsigned ActiveX controls or applets. This is a privilege elevation attack targeted at zone-based web-browser security. In a zone-based model, pages belong to one of a set of zones corresponding to the level of privilege assigned to that page. Pages in an untrusted zone would have a lesser level of access to the system and/or be restricted in the types of executable content it was allowed to invoke. In a cross-zone scripting attack, a page that should be assigned to a less privileged zone is granted the privileges of a more trusted zone. This can be accomplished by exploiting bugs in the browser, exploiting incorrect configuration in the zone controls, through a cross-site scripting attack that causes the attackers' content to be treated as coming from a more trusted page, or by leveraging some piece of system functionality that is accessible from both the trusted and less trusted zone. This attack differs from "Restful Privilege Escalation" in that the latter correlates to the inadequate securing of RESTful access methods (such as HTTP DELETE) on the server, while cross-zone scripting attacks the concept of security zones as implemented by a browser.
  • Cross Site Scripting through Log Files
    An attacker may leverage a system weakness where logs are susceptible to log injection to insert scripts into the system's logs. If these logs are later viewed by an administrator through a thin administrative interface and the log data is not properly HTML encoded before being written to the page, the attackers' scripts stored in the log will be executed in the administrative interface with potentially serious consequences. This attack pattern is really a combination of two other attack patterns: log injection and stored cross site scripting.
  • Command Line Execution through SQL Injection
    An attacker uses standard SQL injection methods to inject data into the command line for execution. This could be done directly through misuse of directives such as MSSQL_xp_cmdshell or indirectly through injection of data into the database that would be interpreted as shell commands. Sometime later, an unscrupulous backend application (or could be part of the functionality of the same application) fetches the injected data stored in the database and uses this data as command line arguments without performing proper validation. The malicious data escapes that data plane by spawning new commands to be executed on the host.

Nessus

  • NASL familyAIX Local Security Checks
    NASL idAIX_IV22694.NASL
    descriptionA kernel extension call is exported to user space without proper sanity checks causing a system crash.
    last seen2020-06-01
    modified2020-06-02
    plugin id63726
    published2013-01-24
    reporterThis script is Copyright (C) 2013-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/63726
    titleAIX 5.3 TL 12 : syscall (IV22694)
    code
    #%NASL_MIN_LEVEL 80502
    #
    # (C) Tenable Network Security, Inc.
    #
    # The text in the description was extracted from AIX Security
    # Advisory syscall_advisory.asc.
    #
    
    include("compat.inc");
    
    if (description)
    {
      script_id(63726);
      script_version("1.3");
      script_cvs_date("Date: 2019/09/16 14:13:08");
    
      script_cve_id("CVE-2012-0723");
    
      script_name(english:"AIX 5.3 TL 12 : syscall (IV22694)");
      script_summary(english:"Check for APAR IV22694");
    
      script_set_attribute(
        attribute:"synopsis", 
        value:"The remote AIX host is missing a security patch."
      );
      script_set_attribute(
        attribute:"description", 
        value:
    "A kernel extension call is exported to user space without proper
    sanity checks causing a system crash."
      );
      script_set_attribute(
        attribute:"see_also",
        value:"http://aix.software.ibm.com/aix/efixes/security/syscall_advisory.asc"
      );
      script_set_attribute(
        attribute:"solution", 
        value:"Install the appropriate interim fix."
      );
      script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C");
    
      script_set_attribute(attribute:"plugin_type", value:"local");
      script_set_attribute(attribute:"cpe", value:"cpe:/o:ibm:aix:5.3");
    
      script_set_attribute(attribute:"vuln_publication_date", value:"2012/07/26");
      script_set_attribute(attribute:"patch_publication_date", value:"2012/07/26");
      script_set_attribute(attribute:"plugin_publication_date", value:"2013/01/24");
      script_end_attributes();
    
      script_category(ACT_GATHER_INFO);
      script_copyright(english:"This script is Copyright (C) 2013-2019 Tenable Network Security, Inc.");
      script_family(english:"AIX Local Security Checks");
    
      script_dependencies("ssh_get_info.nasl");
      script_require_keys("Host/AIX/lslpp", "Host/local_checks_enabled", "Host/AIX/version");
    
      exit(0);
    }
    
    
    
    include("audit.inc");
    include("global_settings.inc");
    include("aix.inc");
    include("misc_func.inc");
    
    if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
    if ( ! get_kb_item("Host/AIX/version") ) audit(AUDIT_OS_NOT, "AIX");
    if ( ! get_kb_item("Host/AIX/lslpp") ) audit(AUDIT_PACKAGE_LIST_MISSING);
    
    if ( get_kb_item("Host/AIX/emgr_failure" ) ) exit(0, "This iFix check is disabled because : "+get_kb_item("Host/AIX/emgr_failure") );
    
    flag = 0;
    
    if (aix_check_ifix(release:"5.3", ml:"12", sp:"06", patch:"IV22694s06", package:"bos.rte.tty", minfilesetver:"5.3.12.0", maxfilesetver:"5.3.12.4") < 0) flag++;
    
    if (flag)
    {
      if (report_verbosity > 0) security_warning(port:0, extra:aix_report_get());
      else security_warning(0);
      exit(0);
    }
    else audit(AUDIT_HOST_NOT, "affected");
    
  • NASL familyAIX Local Security Checks
    NASL idAIX_IV22695.NASL
    descriptionA kernel extension call is exported to user space without proper sanity checks causing a system crash.
    last seen2020-06-01
    modified2020-06-02
    plugin id63727
    published2013-01-24
    reporterThis script is Copyright (C) 2013-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/63727
    titleAIX 6.1 TL 7 : syscall (IV22695)
  • NASL familyAIX Local Security Checks
    NASL idAIX_IV22693.NASL
    descriptionA kernel extension call is exported to user space without proper sanity checks causing a system crash.
    last seen2020-06-01
    modified2020-06-02
    plugin id63725
    published2013-01-24
    reporterThis script is Copyright (C) 2013-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/63725
    titleAIX 6.1 TL 6 : syscall (IV22693)
  • NASL familyAIX Local Security Checks
    NASL idAIX_IV22697.NASL
    descriptionA kernel extension call is exported to user space without proper sanity checks causing a system crash.
    last seen2020-06-01
    modified2020-06-02
    plugin id63729
    published2013-01-24
    reporterThis script is Copyright (C) 2013-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/63729
    titleAIX 7.1 TL 1 : syscall (IV22697)
  • NASL familyAIX Local Security Checks
    NASL idAIX_IV22696.NASL
    descriptionA kernel extension call is exported to user space without proper sanity checks causing a system crash.
    last seen2020-06-01
    modified2020-06-02
    plugin id63728
    published2013-01-24
    reporterThis script is Copyright (C) 2013-2019 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/63728
    titleAIX 7.1 TL 0 : syscall (IV22696)

Seebug

bulletinFamilyexploit
descriptionBUGTRAQ ID: 54706 CVE ID: CVE-2012-0723 AIX是一个基于开放标准的UNIX操作系统,为用户提供企业信息技术基础架构。Virtual I/O Server 提供了命令行的管理方式,通过命令行可以管理VIOS。 IBM AIX和Virtual I/O Server在导出&quot;dupmsg&quot;内核扩展调用到用户空间时存在错误,在实现上存在本地拒绝服务漏洞,攻击者可利用此漏洞使受影响计算机崩溃。 0 IBM AIX 7.x IBM AIX 6.x IBM AIX 5.x IBM Virtual I/O Server (VIOS) 2.x 厂商补丁: IBM --- IBM已经为此发布了一个安全公告(syscall_advisory)以及相应补丁: syscall_advisory:Vulnerability in AIX system call 链接:http://aix.software.ibm.com/aix/efixes/security/syscall_advisory.asc
idSSV:60304
last seen2017-11-19
modified2012-07-31
published2012-07-31
reporterRoot
titleIBM AIX和Virtual I/O Server 'dupmsg'系统呼叫本地拒绝服务漏洞