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vulnerability announce CVE-2015-0288

OpenSSL: NULL pointer dereference via X509_to_X509_REQ

Synthesis of the vulnerability

An attacker can force a NULL pointer to be dereferenced in X509_to_X509_REQ() of OpenSSL, in order to trigger a denial of service.
Impacted software: Arkoon FAST360, ProxySG par Blue Coat, SGOS by Blue Coat, FabricOS, Brocade Network Advisor, Cisco ASR, AnyConnect VPN Client, Cisco ACE, ASA, AsyncOS, Cisco CSS, Cisco ESA, IOS XE Cisco, Cisco IPS, IronPort Email, IronPort Web, Nexus by Cisco, NX-OS, Prime Infrastructure, Cisco PRSM, Cisco Router, Secure ACS, Cisco CUCM, Cisco Unified CCX, Cisco IP Phone, Cisco MeetingPlace, Cisco Wireless IP Phone, WebNS, Cisco WSA, Debian, BIG-IP Hardware, TMOS, Fedora, FreeBSD, hMailServer, HP-UX, AIX, IRAD, Tivoli Workload Scheduler, Juniper J-Series, Junos OS, Junos Space, Junos Space Network Management Platform, NSM Central Manager, NSMXpress, Juniper SBR, McAfee Email Gateway, ePO, McAfee NTBA, McAfee NGFW, VirusScan, McAfee Web Gateway, Data ONTAP, NetBSD, NetScreen Firewall, ScreenOS, OpenBSD, OpenSSL, openSUSE, openSUSE Leap, Oracle Communications, Solaris, pfSense, RHEL, Base SAS Software, SAS SAS/CONNECT, Slackware, Splunk Enterprise, Stonesoft NGFW/VPN, SUSE Linux Enterprise Desktop, SLES, Nessus, Ubuntu, Unix (platform) ~ not comprehensive, WinSCP.
Severity of this computer vulnerability: 2/4.
Consequences of a hack: denial of service on service, denial of service on client.
Attacker's origin: document.
Creation date: 09/03/2015.
Références of this announce: 1701334, 1964410, 55767, 9010031, c04679334, CERTFR-2015-AVI-089, CERTFR-2015-AVI-117, CERTFR-2015-AVI-146, CERTFR-2015-AVI-177, CERTFR-2015-AVI-259, CERTFR-2016-AVI-303, cisco-sa-20150320-openssl, cisco-sa-20150408-ntpd, cpuoct2017, CTX216642, CVE-2015-0288, DSA-3197-1, DSA-3197-2, FEDORA-2015-4300, FEDORA-2015-4303, FEDORA-2015-6855, FreeBSD-SA-15:06.openssl, HPSBUX03334, JSA10680, MDVSA-2015:062, MDVSA-2015:063, NetBSD-SA2015-007, NTAP-20150323-0002, openSUSE-SU-2015:0554-1, openSUSE-SU-2015:1277-1, openSUSE-SU-2015:2243-1, openSUSE-SU-2016:0640-1, RHSA-2015:0715-01, RHSA-2015:0716-01, RHSA-2015:0752-01, RHSA-2015:0800-01, SA40001, SB10110, SOL16301, SOL16302, SOL16317, SOL16319, SOL16320, SOL16321, SOL16323, SPL-98351, SPL-98531, SSA:2015-111-09, SSRT102000, SUSE-SU-2015:0541-1, SUSE-SU-2015:0553-1, SUSE-SU-2015:0553-2, SUSE-SU-2015:0578-1, TNS-2015-04, USN-2537-1, VIGILANCE-VUL-16342.

Description of the vulnerability

The OpenSSL product processes X.509 certificates.

However, the X509_to_X509_REQ() function does not check if a pointer is NULL, before using it.

An attacker can therefore force a NULL pointer to be dereferenced in X509_to_X509_REQ() of OpenSSL, in order to trigger a denial of service.
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