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computer vulnerability CVE-2006-2937 CVE-2006-2940 CVE-2006-3738

OpenSSL: several vulnerabilities

Synthesis of the vulnerability

Several vulnerabilities have been discovered in OpenSSL, the worst one leading to code execution.
Impacted systems: Arkoon FAST360, CiscoWorks, Cisco CSS, Cisco IPS, Cisco Prime Central for HCS, Secure ACS, WebNS, Debian, Fedora, FreeBSD, F-Secure AV, Tru64 UNIX, HP-UX, BIND, Mandriva Linux, Mandriva NF, Windows (platform) ~ not comprehensive, NetBSD, NetScreen Firewall, ScreenOS, OpenBSD, OpenSSL, openSUSE, Solaris, RHEL, Slackware, TurboLinux.
Severity of this alert: 3/4.
Consequences of an intrusion: privileged access/rights, denial of service on service.
Pirate's origin: internet client.
Number of vulnerabilities in this bulletin: 4.
Creation date: 29/09/2006.
Revision date: 20/12/2007.
Références of this alert: 102711, 102747, 20061001-01-P, 6476279, AK-2006-06, AK-2006-07, BID-20246, BID-20247, BID-20248, BID-20249, BID-26093, c00805100, c00849540, c00967144, CERTA-2006-AVI-421, CERTA-2006-AVI-448, CERTA-2006-AVI-454, CERTA-2006-AVI-521, CERTA-2007-AVI-051, CERTA-2008-AVI-141, cisco-sr-20061108-openssl, CSCek57074, CSCsg09619, CSCsg24311, CSCsg58599, CSCsg58607, CSCtx20378, CVE-2006-2937, CVE-2006-2940, CVE-2006-3738, CVE-2006-4343, DSA-1185-1, DSA-1195-1, emr_na-c01203958-1, FEDORA-2006-1004, FreeBSD-SA-06:23.openssl, FSC-2006-6, HPSBTU02207, HPSBUX02174, HPSBUX02186, MDKSA-2006:172, MDKSA-2006:177, MDKSA-2006:178, NetBSD-SA2008-007, RHSA-2006:0695-01, RHSA-2008:0264-01, RHSA-2008:0525-01, SSA:2006-272-01, SSRT061213, SSRT061239, SSRT071299, SSRT071304, SUSE-SA:2006:058, SUSE-SR:2006:024, TLSA-2006-33, TLSA-2007-52, VIGILANCE-VUL-6185, VU#247744, VU#386964, VU#423396, VU#547300.

Description of the vulnerability

Several vulnerabilities were announced in OpenSSL.

Certain ASN.1 structures can generate an error leading to an infinite loop which will consumes system memory. This condition thus permits to generate a denial of service on the system. [severity:3/4; BID-20248, CERTA-2006-AVI-421, CERTA-2006-AVI-448, CERTA-2006-AVI-521, CERTA-2008-AVI-141, CVE-2006-2937, VU#247744]

Certain types of public keys encoded with ASN.1 can take an extremely long duration to be decoded. An attacker can thus use this vulnerability to generate a denial of service. [severity:3/4; BID-20247, CERTA-2007-AVI-051, CVE-2006-2940, VU#423396]

A buffer overflow in the SSL_get_shared_ciphers() function permits an attacker to run code on the system by sending a succession of malicious packets to an application using openssl. [severity:3/4; BID-20249, CVE-2006-3738, VU#547300]

An attacker can create a malicious SSLv2 server in order to generate a denial of service on connected clients. [severity:2/4; BID-20246, CVE-2006-4343, VU#386964]
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