Vulnerabilities > CVE-2008-1748 - Improper Input Validation vulnerability in Cisco Unified Communications Manager

Attack vector
Attack complexity
Privileges required
Confidentiality impact
Integrity impact
Availability impact
low complexity


Cisco Unified Communications Manager 4.1 before 4.1(3)SR7, 4.2 before 4.2(3)SR4, 4.3 before 4.3(2), 5.x before 5.1(3), and 6.x before 6.1(1) does not properly validate SIP URLs, which allows remote attackers to cause a denial of service (service interruption) via a SIP INVITE message, aka Bug ID CSCsl22355.

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.


descriptionBUGTRAQ ID: 29221 CVE(CAN) ID: CVE-2008-1744,CVE-2008-1745,CVE-2008-1746,CVE-2008-1747,CVE-2008-1748,CVE-2008-1742,CVE-2008-1743 Cisco Unified Communications Manager(CUCM,之前被称为CallManager)是Cisco IP电话解决方案中的呼叫处理组件。 CUCM中存在多个拒绝服务漏洞,可能导致语音服务中断。 以下Cisco Unified Communications Manager服务受影响: * 证书信任列表(CTL)供应程序 * 证书权威代理功能(CAPF) * 会话初始协议(SIP) * 简单网络管理协议(SNMP)Trap 证书信任列表供应程序相关漏洞 当有漏洞的Cisco Unified Communications Manager系统接收到一系列畸形TCP报文时,Cisco Unified Communications Manager 5.x版本的证书信任列表(CTL)供应程序中的内存耗尽漏洞可能导致拒绝服务。CTL Provider服务默认监听在TCP 2444端口上,是用户可配置的,也是默认启用的。这个漏洞在Cisco Bug ID中记录为CSCsj80609,所分配的CVE标识为CVE-2008-1742。 当有漏洞的Cisco Unified Communications Manager系统接收到一系列畸形TCP报文时,Cisco Unified Communications Manager 5.x和6.x版本的CTL Provider服务的内存耗尽漏洞可能导致拒绝服务。CTL Provider服务默认监听在TCP 2444端口上,是用户可配置的。这个漏洞在Cisco Bug ID中记录为CSCsi98433,所分配的CVE标识为CVE-2008-1743。 证书权威代理功能相关漏洞 Unified Communications Manager 4.1、4.2和4.3版本的证书权威代理功能(CAPF)服务在处理畸形输入时存在拒绝服务漏洞。CAPF服务默认监听在TCP 3804端口,是用户可配置的。CAPF服务默认下为禁用。这个漏洞在Cisco Bug ID中记录为CSCsk46770,所分配的CVE标识为CVE-2008-1744。 SIP相关漏洞 Cisco Unified Communications Manager的5.x和6.x在处理畸形SIP JOIN消息时存在拒绝服务漏洞。无法在Cisco Unified Communications Manager中禁用SIP处理。这个漏洞在Cisco Bug ID中记录为CSCsi48115,所分配的CVE标识为CVE-2008-1745。 Cisco Unified Communications Manager 4.1、4.2、4.3、5.x和6.x版本在处理SIP INVITE消息时存在拒绝服务漏洞。无法在Cisco Unified Communications Manager中禁用SIP处理。这个漏洞在Cisco Bug ID中记录为CSCsk46944,所分配的CVE标识为CVE-2008-1747。 Cisco Unified Communications Manager 4.1、4.2、4.3、5.x和6.x版本在处理SIP INVITE消息时存在拒绝服务漏洞。无法在Cisco Unified Communications Manager中禁用SIP处理。这个漏洞在Cisco Bug ID中记录为CSCsl22355,所分配的CVE标识为CVE-2008-1748。 SNMP Trap相关漏洞 当有漏洞的Cisco Unified Communications Manager系统接收到畸形UDP报文时,Cisco Unified Communications Manager 4.1、4.2、4.3、5.x和6.x版本的SNMP Trap代理服务会出现拒绝服务漏洞。这个漏洞在Cisco Bug ID中记录为CSCsj24113,所分配的CVE标识为CVE-2008-1746。 Cisco Unified CallManager 4.1 Cisco Unified Communications Manager 6.x Cisco Unified Communications Manager 5.x Cisco Unified Communications Manager 4.3 Cisco Unified Communications Manager 4.2 临时解决方法: * 禁用有漏洞的服务。 厂商补丁: Cisco ----- Cisco已经为此发布了一个安全公告(cisco-sa-20080514-cucmdos)以及相应补丁: cisco-sa-20080514-cucmdos:Cisco Unified Communications Manager Denial of Service Vulnerabilities 链接:<a href= target=_blank></a> 补丁下载: <a href= target=_blank></a> <a href= target=_blank></a> <a href= target=_blank></a> <a href= target=_blank></a> <a href= target=_blank></a>
last seen2017-11-19
titleCisco Unified Communications Manager多个拒绝服务漏洞