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CVE-2013-1762

Status Candidate

Overview

stunnel 4.21 through 4.54, when CONNECT protocol negotiation and NTLM authentication are enabled, does not correctly perform integer conversion, which allows remote proxy servers to execute arbitrary code via a crafted request that triggers a buffer overflow.

Related Files

Gentoo Linux Security Advisory 201402-08
Posted Feb 7, 2014
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201402-8 - Multiple vulnerabilities have been found in stunnel, the worst of which may cause a Denial of Service condition. Versions less than 4.56-r1 are affected.

tags | advisory, denial of service, vulnerability
systems | linux, gentoo
advisories | CVE-2012-2686, CVE-2013-0166, CVE-2013-0169, CVE-2013-1762
MD5 | 36b86d02329d940a3e684bc002db9528
Debian Security Advisory 2664-1
Posted May 2, 2013
Authored by Debian | Site debian.org

Debian Linux Security Advisory 2664-1 - Stunnel, a program designed to work as an universal SSL tunnel for network daemons, is prone to a buffer overflow vulnerability when using the Microsoft NT LAN Manager (NTLM) authentication ("protocolAuthentication = NTLM") together with the 'connect' protocol method ("protocol = connect"). With these prerequisites and using stunnel4 in SSL client mode ("client = yes") on a 64bit host, an attacker could possibly execute arbitrary code with the privileges of the stunnel process, if the attacker can either control the specified proxy server or perform man-in-the-middle attacks on the tcp session between stunnel and the proxy sever.

tags | advisory, overflow, arbitrary, tcp, protocol
systems | linux, debian
advisories | CVE-2013-1762
MD5 | 956f891d263fe227dcf1ba18a3517e38
Mandriva Linux Security Advisory 2013-130
Posted Apr 11, 2013
Authored by Mandriva | Site mandriva.com

Mandriva Linux Security Advisory 2013-130 - stunnel 4.21 through 4.54, when CONNECT protocol negotiation and NTLM authentication are enabled, does not correctly perform integer conversion, which allows remote proxy servers to execute arbitrary code via a crafted request that triggers a buffer overflow.

tags | advisory, remote, overflow, arbitrary, protocol
systems | linux, mandriva
advisories | CVE-2013-1762
MD5 | 0d68dd26380a4520b0a1059debdcc6ed
Red Hat Security Advisory 2013-0714-01
Posted Apr 8, 2013
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2013-0714-01 - stunnel is a socket wrapper which can provide SSL support to ordinary applications. For example, it can be used in conjunction with imapd to create an SSL-secure IMAP server. An integer conversion issue was found in stunnel when using Microsoft NT LAN Manager authentication with the HTTP CONNECT tunneling method. With this configuration, and using stunnel in SSL client mode on a 64-bit system, an attacker could possibly execute arbitrary code with the privileges of the stunnel process via a man-in-the-middle attack or by tricking a user into using a malicious proxy.

tags | advisory, web, arbitrary, imap
systems | linux, redhat
advisories | CVE-2013-1762
MD5 | 53fa9e8fbad0ab1d4e9c09ff0590da98
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