CVE-2005-2534
CVSS2.6
发布时间 :2005-08-24 00:00:00
修订时间 :2008-09-05 16:52:01
NMCOPS    

[原文]Race condition in OpenVPN before 2.0.1, when --duplicate-cn is not enabled, allows remote attackers to cause a denial of service (server crash) via simultaneous TCP connections from multiple clients that use the same client certificate.


[CNNVD]OpenVPN多个拒绝服务漏洞(CNNVD-200508-276)

        OpenVPN是一个基于OpenSSL库的应用层VPN实现。
        OpenVPN中存在多个拒绝服务漏洞,具体如下:
        如果到服务器的客户端连接证书认证失败的话,就无法刷新OpenSSL错误队列,导致服务器上另一个无关的客户端例程看到错误并响应该错误,这样无关的客户端就会断开连接。(CAN-2005-2531)
        如果无法在服务器上解密客户端发送的报文的话,就无法刷新OpenSSL错误队列,导致服务器上另一个无关的客户端例程看到错误并响应该错误,这样无关的客户端就会断开连接。(CAN-2005-2532)
        理论上"dev tap"以太网桥接模式中的恶意客户端可以用看起来好像来自很多不同MAC地址的报文充斥服务器,导致OpenVPN进程在扩展其内部路由表时耗尽系统虚拟内存。(CAN-2005-2533)
        如果服务器中没有启用--duplicate-cn,则在两个或多个客户端机器同时通过TCP使用相同的客户端证书试图连接到服务器时,竞争条件会导致服务器"Assertion failed at mtcp.c:411"崩溃。(CAN-2005-2534)

- CVSS (基础分值)

CVSS分值: 2.6 [轻微(LOW)]
机密性影响: NONE [对系统的机密性无影响]
完整性影响: NONE [不会对系统完整性产生影响]
可用性影响: PARTIAL [可能会导致性能下降或中断资源访问]
攻击复杂度: HIGH [漏洞利用存在特定的访问条件]
攻击向量: [--]
身份认证: NONE [漏洞利用无需身份认证]

- CPE (受影响的平台与产品)

cpe:/a:openvpn:openvpn:2.0_rc11
cpe:/a:openvpn:openvpn:2.0_rc14
cpe:/a:openvpn:openvpn:2.0_rc4
cpe:/a:openvpn:openvpn:2.0_test21
cpe:/a:openvpn:openvpn:2.0_test22
cpe:/a:openvpn:openvpn:2.0_beta19
cpe:/a:openvpn:openvpn:2.0_rc5
cpe:/a:openvpn:openvpn:2.0_test27
cpe:/a:openvpn:openvpn:2.0_beta28
cpe:/a:openvpn:openvpn:2.0_rc16
cpe:/a:openvpn:openvpn:2.0_test1
cpe:/a:openvpn:openvpn:2.0_rc15
cpe:/a:openvpn:openvpn:2.0_beta6
cpe:/a:openvpn:openvpn:2.0_beta18
cpe:/a:openvpn:openvpn:2.0_beta8
cpe:/a:openvpn:openvpn:2.0_beta13
cpe:/a:openvpn:openvpn:2.0_test11
cpe:/a:openvpn:openvpn:2.0_rc9
cpe:/a:openvpn:openvpn:2.0.1_rc2
cpe:/a:openvpn:openvpn:2.0_rc1
cpe:/a:openvpn:openvpn:2.0_test6
cpe:/a:openvpn:openvpn:2.0_beta9
cpe:/a:openvpn:openvpn:2.0.1_rc1
cpe:/a:openvpn:openvpn:2.0_rc12
cpe:/a:openvpn:openvpn:2.0_test5
cpe:/a:openvpn:openvpn:2.0_test9
cpe:/a:openvpn:openvpn:2.0_rc2
cpe:/a:openvpn:openvpn:2.0.1_rc3
cpe:/a:openvpn:openvpn:2.0_test3
cpe:/a:openvpn:openvpn:2.0_test10
cpe:/a:openvpn:openvpn:2.0_test20
cpe:/a:openvpn:openvpn:2.0_test8
cpe:/a:openvpn:openvpn:2.0_rc6
cpe:/a:openvpn:openvpn:2.0_rc13
cpe:/a:openvpn:openvpn:2.0_beta16
cpe:/a:openvpn:openvpn:2.0_rc17
cpe:/a:openvpn:openvpn:2.0_rc10
cpe:/a:openvpn:openvpn:2.0_beta12
cpe:/a:openvpn:openvpn:2.0_test7
cpe:/a:openvpn:openvpn:2.0_beta20
cpe:/a:openvpn:openvpn:2.0.1_rc4
cpe:/a:openvpn:openvpn:2.0_beta7
cpe:/a:openvpn:openvpn:2.0_rc20
cpe:/a:openvpn:openvpn:2.0_test23
cpe:/a:openvpn:openvpn:2.0.1_rc6
cpe:/a:openvpn:openvpn:2.0_beta1
cpe:/a:openvpn:openvpn:2.0_test18
cpe:/a:openvpn:openvpn:2.0_rc21
cpe:/a:openvpn:openvpn:2.0_test17
cpe:/a:openvpn:openvpn:2.0_test14
cpe:/a:openvpn:openvpn:2.0_beta4
cpe:/a:openvpn:openvpn:2.0_rc19
cpe:/a:openvpn:openvpn:2.0_test2
cpe:/a:openvpn:openvpn:2.0_beta11
cpe:/a:openvpn:openvpn:2.0_beta3
cpe:/a:openvpn:openvpn:2.0_rc8
cpe:/a:openvpn:openvpn:2.0_beta15
cpe:/a:openvpn:openvpn:2.0_test15
cpe:/a:openvpn:openvpn:2.0_test29
cpe:/a:openvpn:openvpn:2.0_beta5
cpe:/a:openvpn:openvpn:2.0
cpe:/a:openvpn:openvpn:2.0_test26
cpe:/a:openvpn:openvpn:2.0_beta10
cpe:/a:openvpn:openvpn:2.0_test24
cpe:/a:openvpn:openvpn:2.0_test16
cpe:/a:openvpn:openvpn:2.0_rc18
cpe:/a:openvpn:openvpn:2.0_beta17
cpe:/a:openvpn:openvpn:2.0_test12
cpe:/a:openvpn:openvpn:2.0_test19
cpe:/a:openvpn:openvpn:2.0.1_rc5
cpe:/a:openvpn:openvpn:2.0.1_rc7
cpe:/a:openvpn:openvpn:2.0_beta2
cpe:/a:openvpn:openvpn:2.0_rc3
cpe:/a:openvpn:openvpn:2.0_rc7

- OVAL (用于检测的技术细节)

未找到相关OVAL定义

- 官方数据库链接

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2534
(官方数据源) MITRE
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2005-2534
(官方数据源) NVD
http://www.cnnvd.org.cn/vulnerability/show/cv_cnnvdid/CNNVD-200508-276
(官方数据源) CNNVD

- 其它链接及资源

http://www.mandriva.com/security/advisories?name=MDKSA-2005:145
(VENDOR_ADVISORY)  MANDRIVA  MDKSA-2005:145
http://www.securityfocus.com/bid/14610
(UNKNOWN)  BID  14610
http://www.debian.org/security/2005/dsa-851
(UNKNOWN)  DEBIAN  DSA-851
http://secunia.com/advisories/17103
(UNKNOWN)  SECUNIA  17103
http://secunia.com/advisories/16463
(UNKNOWN)  SECUNIA  16463
http://openvpn.net/changelog.html
(UNKNOWN)  CONFIRM  http://openvpn.net/changelog.html

- 漏洞信息

OpenVPN多个拒绝服务漏洞
低危 竞争条件
2005-08-24 00:00:00 2005-10-20 00:00:00
远程  
        OpenVPN是一个基于OpenSSL库的应用层VPN实现。
        OpenVPN中存在多个拒绝服务漏洞,具体如下:
        如果到服务器的客户端连接证书认证失败的话,就无法刷新OpenSSL错误队列,导致服务器上另一个无关的客户端例程看到错误并响应该错误,这样无关的客户端就会断开连接。(CAN-2005-2531)
        如果无法在服务器上解密客户端发送的报文的话,就无法刷新OpenSSL错误队列,导致服务器上另一个无关的客户端例程看到错误并响应该错误,这样无关的客户端就会断开连接。(CAN-2005-2532)
        理论上"dev tap"以太网桥接模式中的恶意客户端可以用看起来好像来自很多不同MAC地址的报文充斥服务器,导致OpenVPN进程在扩展其内部路由表时耗尽系统虚拟内存。(CAN-2005-2533)
        如果服务器中没有启用--duplicate-cn,则在两个或多个客户端机器同时通过TCP使用相同的客户端证书试图连接到服务器时,竞争条件会导致服务器"Assertion failed at mtcp.c:411"崩溃。(CAN-2005-2534)

- 公告与补丁

        目前厂商已经发布了升级补丁以修复这个安全问题,补丁下载链接:
        http://openvpn.net/release/openvpn-2.0.1.tar.gz

- 漏洞信息 (F40556)

Debian Linux Security Advisory 851-1 (PacketStormID:F40556)
2005-10-11 00:00:00
Debian  security.debian.org
advisory
linux,debian
CVE-2005-2531,CVE-2005-2532,CVE-2005-2533,CVE-2005-2534
[点击下载]

Debian Security Advisory DSA 851-1 - Several security related problems have been discovered in openvpn, a Virtual Private Network daemon.

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

- --------------------------------------------------------------------------
Debian Security Advisory DSA 851-1                     security@debian.org
http://www.debian.org/security/                             Martin Schulze
October 9th, 2005                       http://www.debian.org/security/faq
- --------------------------------------------------------------------------

Package        : openvpn
Vulnerability  : programming errors
Problem type   : remote
Debian-specific: no
CVE ID         : CAN-2005-2531 CAN-2005-2532 CAN-2005-2533 CAN-2005-2534
Debian Bug     : 324167

Several security related problems have been discovered in openvpn, a
Virtual Private Network daemon.  The Common Vulnerabilities and
Exposures project identifies the following problems:

CAN-2005-2531

    Wrong processing of failed certificate authentication when running
    with "verb 0" and without TLS authentication can lead to a denial
    of service by disconnecting the wrong client.

CAN-2005-2532

    Wrong handling of packets that can't be decrypted on the server
    can lead to the disconnection of unrelated clients.

CAN-2005-2533

    When running in "dev tap" Ethernet bridging mode, openvpn can
    exhaust its memory by receiving a large number of spoofed MAC
    addresses and hence denying service.

CAN-2005-2534

    Simultaneous TCP connections from multiple clients with the same
    client certificate can cause a denial of service when
    --duplicate-cn is not enabled.

The old stable distribution (woody) does not contain openvpn packages.

For the stable distribution (sarge) these problems have been fixed in
version 2.0-1sarge1.

For the unstable distribution (sid) these problems have been fixed in
version 2.0.2-1.

We recommend that you upgrade your openvpn 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:

    http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1.dsc
      Size/MD5 checksum:      629 1fee867074a153eac1f82d11e75aa833
    http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1.diff.gz
      Size/MD5 checksum:    51566 578da11dd408ea72e4791646e700dac4
    http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0.orig.tar.gz
      Size/MD5 checksum:   639201 7401faebc6baee9add32608709c54eec

  Alpha architecture:

    http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_alpha.deb
      Size/MD5 checksum:   347184 ed8f3706d9f7af8b4baf148786141e5a

  AMD64 architecture:

    http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_amd64.deb
      Size/MD5 checksum:   316422 3dfdd5a007c62ceb28153e63677a884a

  ARM architecture:

    http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_arm.deb
      Size/MD5 checksum:   296464 20f23e0a9f251eedc340e926f455c8e0

  Intel IA-32 architecture:

    http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_i386.deb
      Size/MD5 checksum:   302424 fe92352695fd5fdfa85a4ffea6b7cffe

  Intel IA-64 architecture:

    http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_ia64.deb
      Size/MD5 checksum:   395514 04207a2bfd92cd56c79a4d434f514bee

  HP Precision architecture:

    http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_hppa.deb
      Size/MD5 checksum:   316716 8065982ef523c653e8d25bedf716fb03

  Motorola 680x0 architecture:

    http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_m68k.deb
      Size/MD5 checksum:   276388 33de460a73afad6cb44a6753ea862c27

  Big endian MIPS architecture:

    http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_mips.deb
      Size/MD5 checksum:   317632 d8f4dd1ea4fce2c4c48a3e096d3da12c

  Little endian MIPS architecture:

    http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_mipsel.deb
      Size/MD5 checksum:   319404 c9a918128a56462a98049b160bfeb9d0

  PowerPC architecture:

    http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_powerpc.deb
      Size/MD5 checksum:   308772 1f7300816c44924fc10b5ba6e59ff00c

  IBM S/390 architecture:

    http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_s390.deb
      Size/MD5 checksum:   307220 bf9b59dab82ff1bd49ce7b4a3c9f2d7f

  Sun Sparc architecture:

    http://security.debian.org/pool/updates/main/o/openvpn/openvpn_2.0-1sarge1_sparc.deb
      Size/MD5 checksum:   294696 503317cf10f2976dffa8d25056517925


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

- ---------------------------------------------------------------------------------
For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
Mailing list: debian-security-announce@lists.debian.org
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>

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Version: GnuPG v1.4.1 (GNU/Linux)

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_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/
    

- 漏洞信息

18885
OpenVPN Client Connection Saturation Duplicate Certificate DoS
Denial of Service
Loss of Availability

- 漏洞描述

Unknown or Incomplete

- 时间线

2005-08-16 Unknow
Unknow Unknow

- 解决方案

Unknown or Incomplete

- 相关参考

- 漏洞作者

Unknown or Incomplete

- 漏洞信息

OpenVPN Same Client Certificate Denial Of Service Vulnerability
Race Condition Error 14610
Yes No
2005-08-19 12:00:00 2009-07-12 05:06:00
The vendor has released this vulnerability.

- 受影响的程序版本

ProZIlla ProZilla Download Accelarator 1.4 .0
ProZIlla ProZilla Download Accelarator 1.3.2
ProZIlla ProZilla Download Accelarator 1.2.1
OpenVPN OpenVPN 2.0
+ 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
OpenVPN OpenVPN 1.6 .0
OpenVPN OpenVPN 1.5 .0
OpenVPN OpenVPN 1.4.3
OpenVPN OpenVPN 1.4.2
OpenVPN OpenVPN 1.4.1
MandrakeSoft Multi Network Firewall 2.0
OpenVPN OpenVPN 2.0.1

- 不受影响的程序版本

OpenVPN OpenVPN 2.0.1

- 漏洞讨论

OpenVPN is prone to a denial of service vulnerability. This vulnerability results in a race condition crashing the affected server.

This vulnerability will allow an authenticated attacker to deny service to legitimate users and to crash the affected server application.

- 漏洞利用

No exploit is required.

- 解决方案

The vendor has released version 2.0.1 to resolve this issue.

Mandriva has released advisory MDKSA-2005:145, along with fixes to address various issues in OpenVPN. Please see the referenced advisory for further information.

Debian has released advisory DSA 851-1 to address this issue. Please see the referenced advisory for more information.


ProZIlla ProZilla Download Accelarator 1.2.1

ProZIlla ProZilla Download Accelarator 1.3.2

ProZIlla ProZilla Download Accelarator 1.4 .0

OpenVPN OpenVPN 1.4.1

OpenVPN OpenVPN 1.4.2

OpenVPN OpenVPN 1.4.3

OpenVPN OpenVPN 1.5 .0

OpenVPN OpenVPN 1.6 .0

OpenVPN OpenVPN 2.0

MandrakeSoft Multi Network Firewall 2.0

- 相关参考

 

 

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