发布时间 :2006-02-13 06:06:00
修订时间 :2017-07-19 21:29:27

[原文]squid_redirect script in adzapper before 2006-01-29 allows remote attackers to cause a denial of service (CPU consumption) via a URL with a large number of trailing / (forward slashes), which might produce inefficient regular expressions.

[CNNVD]Adzapper Squid_Redirect URI处理远程拒绝服务漏洞(CNNVD-200602-152)

        adzapper 2006-01-29之前版本中的squid_redirect脚本可使远程攻击者借助带有大量后缀/(前斜线)(可能产生低效率的正则表达式)的URL造成拒绝服务(CPU占用率高)。

- CVSS (基础分值)

CVSS分值: 7.8 [严重(HIGH)]
机密性影响: [--]
完整性影响: [--]
可用性影响: [--]
攻击复杂度: [--]
攻击向量: [--]
身份认证: [--]

- CPE (受影响的平台与产品)


- OVAL (用于检测的技术细节)


- 官方数据库链接
(官方数据源) MITRE
(官方数据源) NVD
(官方数据源) CNNVD

- 其它链接及资源
(UNKNOWN)  CONFIRM;msg=5;att=1
(UNKNOWN)  MISC;msg=5;att=1
(UNKNOWN)  BID  16558
(UNKNOWN)  VUPEN  ADV-2006-0491
(UNKNOWN)  XF  adzapper-squid-redirect-dos(24640)

- 漏洞信息

Adzapper Squid_Redirect URI处理远程拒绝服务漏洞
高危 其他
2006-02-13 00:00:00 2006-02-14 00:00:00
        adzapper 2006-01-29之前版本中的squid_redirect脚本可使远程攻击者借助带有大量后缀/(前斜线)(可能产生低效率的正则表达式)的URL造成拒绝服务(CPU占用率高)。

- 公告与补丁


- 漏洞信息 (F43701)

Debian Linux Security Advisory 966-1 (PacketStormID:F43701)
2006-02-10 00:00:00
advisory,denial of service

Debian Security Advisory DSA 966-1 - Thomas Reifferscheid discovered that adzapper, a proxy advertisement zapper add-on, when installed as plugin in squid, the Internet object cache, can consume a lot of CPU resources and hence cause a denial of service on the proxy host.

Hash: SHA1

- --------------------------------------------------------------------------
Debian Security Advisory DSA 966-1                                        Martin Schulze
February 9th, 2006            
- --------------------------------------------------------------------------

Package        : adzapper
Vulnerability  : denial of service
Problem type   : remote
Debian-specific: no
CVE ID         : CVE-2006-0046
Debian Bug     : 350308

Thomas Reifferscheid discovered that adzapper, a proxy advertisement
zapper add-on, when installed as plugin in squid, the Internet object
cache, can consume a lot of CPU resources and hence cause a denial of
service on the proxy host.

The old stable distribution (woody) does not contain an adzapper package.

For the stable distribution (sarge) this problem has been fixed in
version 20050316-1sarge1.

For the unstable distribution (sid) this problem has been fixed in
version 20060115-1.

We recommend that you upgrade your adzapper package.

Upgrade Instructions
- --------------------

wget url
        will fetch the file for you
dpkg -i file.deb
        will install the referenced file.

If you are using the apt-get package manager, use the line for
sources.list as given below:

apt-get update
        will update the internal database
apt-get upgrade
        will install corrected packages

You may use an automated update by adding the resources from the
footer to the proper configuration.

Debian GNU/Linux 3.1 alias sarge
- --------------------------------

  Source archives:
      Size/MD5 checksum:      593 46351acfe636a0fa3bb74353708ba841
      Size/MD5 checksum:     5525 0fc182315da374cac8c370d536caf1de
      Size/MD5 checksum:    49003 c5e85d7664b873deea48f8ad16a5f68e

  Architecture independent components:
      Size/MD5 checksum:    53932 1e3b19a4b4a8fc8ad9b681829de0d9f2

  These files will probably be moved into the stable distribution on
  its next update.

- ---------------------------------------------------------------------------------
For apt-get: deb stable/updates main
For dpkg-ftp: dists/stable/updates/main
Mailing list:
Package info: `apt-cache show <pkg>' and<pkg>

Version: GnuPG v1.4.2 (GNU/Linux)



- 漏洞信息

Ad Zapping With Squid squid_redirect Crafted URL DoS
Remote / Network Access Denial of Service, Input Manipulation
Loss of Availability
Exploit Unknown Vendor Verified

- 漏洞描述

Ad Zapper for squid contains a flaw that may allow a remote denial of service. The issue is triggered when sending a URL to the squid_redirect script with a large number of forward slashes. This can cause the remote host to consume CPU resources, potentially causing a denial of service.

- 时间线

2006-01-29 Unknow
Unknow Unknow

- 解决方案

Upgrade to version 3.5 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

- 相关参考

- 漏洞作者

- 漏洞信息

Adzapper Squid_Redirect URI Handling Remote Denial of Service Vulnerability
Failure to Handle Exceptional Conditions 16558
Yes No
2006-02-09 12:00:00 2006-02-09 05:03:00
Discovered by Thomas Reifferscheid <>.

- 受影响的程序版本

Debian Linux 3.1 sparc
Debian Linux 3.1 s/390
Debian Linux 3.1 ppc
Debian Linux 3.1 mipsel
Debian Linux 3.1 mips
Debian Linux 3.1 m68k
Debian Linux 3.1 ia-64
Debian Linux 3.1 ia-32
Debian Linux 3.1 hppa
Debian Linux 3.1 arm
Debian Linux 3.1 amd64
Debian Linux 3.1 alpha
Debian Linux 3.1
adzapper adzapper 20060115
adzapper adzapper 20050316
adzapper adzapper 20030726
adzapper adzapper 20060129

- 不受影响的程序版本

adzapper adzapper 20060129

- 漏洞讨论

Adzapper is prone to a remote denial-of-service vulnerability when installed as a plugin in squid.

The vulnerability presents itself when a specially crafted URI is handled.

Adzapper versions prior to 2006-01-29 are vulnerable.

- 漏洞利用

An exploit is not required.

- 解决方案

The vendor has addressed this issue in adzapper 20060129 and subsequent versions. Please see the referenced vendor advisories for more information.

- 相关参考