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vulnerability alert CVE-2010-4476

Java JRE: denial of service via a real

Synthesis of the vulnerability

An attacker can use a special double floating point number, in order to create an infinite loop in Java programs.
Vulnerable software: Debian, Fedora, HPE BAC, HPE NNMi, OpenView, OpenView NNM, Tru64 UNIX, HP-UX, AIX, DB2 UDB, Tivoli Directory Server, Tivoli Storage Manager, Tivoli System Automation, Tivoli Workload Scheduler, WebSphere AS Traditional, WebSphere MQ, JBoss AS OpenSource, Mandriva Linux, NLD, OES, Java OpenJDK, openSUSE, Oracle iPlanet Web Server, Java Oracle, Oracle Web Tier, RHEL, JBoss EAP by Red Hat, SLES.
Severity of this announce: 3/4.
Consequences of an intrusion: denial of service on service, denial of service on client.
Attacker's origin: document.
Creation date: 02/02/2011.
Références of this computer vulnerability: 1468291, BID-46091, c02729756, c02738573, c02746026, c02752210, c02775276, c02826781, c02906075, c03090723, c03316985, CERTA-2002-AVI-271, CERTA-2012-AVI-286, cpuapr2011, CVE-2010-4476, DSA-2161-1, DSA-2161-2, FEDORA-2011-1231, FEDORA-2011-1263, HPSBMU02690, HPSBTU02684, HPSBUX02633, HPSBUX02641, HPSBUX02642, HPSBUX02645, HPSBUX02685, HPSBUX02725, HPSBUX02777, IZ94331, javacpufeb2011, MDVSA-2011:054, openSUSE-SU-2011:0126-1, PM32175, PM32177, PM32184, PM32192, PM32194, RHSA-2011:0210-01, RHSA-2011:0211-01, RHSA-2011:0212-01, RHSA-2011:0213-01, RHSA-2011:0214-01, RHSA-2011:0282-01, RHSA-2011:0290-01, RHSA-2011:0291-01, RHSA-2011:0292-01, RHSA-2011:0299-01, RHSA-2011:0333-01, RHSA-2011:0334-01, RHSA-2011:0336-01, RHSA-2011:0348-01, RHSA-2011:0349-01, RHSA-2011:0880-01, SSRT100387, SSRT100390, SSRT100412, SSRT100415, SSRT100505, SSRT100569, SSRT100627, SSRT100854, SUSE-SA:2011:010, SUSE-SA:2011:014, SUSE-SR:2011:008, SUSE-SU-2011:0823-1, swg21469266, swg24030066, swg24030067, VIGILANCE-VUL-10321.

Description of the vulnerability

The number 2.2250738585072011e-308 if the "largest subnormal double number" (in base 2 : 0x0fffffffffffff x 2^-1022).

On a x86 processor, the Java JRE uses x87 FPU registers (80 bit), in order to find bit-after-bit the closest real value. This loop stops when the remainder is inferior to the precision. However, with the number 2.225..., this stop condition is never true (80 bit rounded to 64 bit), and an infinite loop occurs.

An attacker can therefore use a special double floating point number, in order to create an infinite loop in Java programs.

The origin of this vulnerability is the same as VIGILANCE-VUL-10257.
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