Rechercher
Contactez-nous Suivez-nous sur Twitter En francais English Language
 











Freely subscribe to our NEWSLETTER

Newsletter FR

Newsletter EN

Vulnérabilités

Unsubscribe

Vigil@nce - OpenSSL: NULL pointer dereference via Certificate Verification

February 2016 by Vigil@nce

This bulletin was written by Vigil@nce : http://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

An attacker can force a NULL pointer to be dereferenced during the
certificate verification of OpenSSL (in client or server mode), in
order to trigger a denial of service.

Impacted products: ProxyAV, ProxySG, SGOS, Cisco ASR, Cisco ATA,
Cisco AnyConnect Secure Mobility Client, ASA, AsyncOS, Cisco
Content SMA, Cisco ESA, Cisco Nexus, NX-OS, Cisco Prime Access
Registrar, Prime Collaboration Assurance, Cisco Prime DCNM, Prime
Infrastructure, Cisco PRSM, Secure ACS, Cisco CUCM, Cisco
MeetingPlace, Cisco WSA, Cisco Wireless Controller, Debian, BIG-IP
Hardware, TMOS, Fedora, FortiAnalyzer, FortiAnalyzer Virtual
Appliance, FortiClient, FortiGate, FortiGate Virtual Appliance,
FortiManager, FortiManager Virtual Appliance, FortiOS, FreeBSD,
AIX, IRAD, IVE OS, MAG Series Juniper, Juniper SA, Juniper SBR,
Data ONTAP, OpenBSD, OpenSSL, openSUSE, openSUSE Leap, Solaris,
pfSense, Pulse Connect Secure, MAG Series Pulse Secure, Pulse
Secure SBR, Puppet, RHEL, Slackware, stunnel, Synology DS***,
Synology RS***, Ubuntu, Unix (platform) not comprehensive.

Severity: 2/4.

Creation date: 03/12/2015.

DESCRIPTION OF THE VULNERABILITY

The OpenSSL library can use the RSA PSS algorithm to check the
validity of X.509 certificates.

However, if the "mask generation" parameter is missing during the
verification of a signature in ASN.1 format, OpenSSL does not
check if a pointer is NULL, before using it.

An attacker can therefore force a NULL pointer to be dereferenced
during the certificate verification of OpenSSL (in client or
server mode), in order to trigger a denial of service.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/OpenSSL-NULL-pointer-dereference-via-Certificate-Verification-18435


See previous articles

    

See next articles












Your podcast Here

New, you can have your Podcast here. Contact us for more information ask:
Marc Brami
Phone: +33 1 40 92 05 55
Mail: ipsimp@free.fr

All new podcasts