ID

VAR-201110-0318

CVE

CVE-2011-3253

TITLE

Apple iOS of CalDAV Vulnerability in which important information is obtained

DESCRIPTION

CalDAV in Apple iOS before 5 does not validate X.509 certificates for SSL sessions, which allows man-in-the-middle attackers to spoof calendar servers and obtain sensitive information via an arbitrary certificate. Apple iOS is prone to an information-disclosure vulnerability that affects the calendar synchronization feature. Attackers can exploit this issue to obtain sensitive information from CalDAV communications. An attacker can exploit this issue through man-in-the-middle attacks by impersonating a trusted server. This may allow the attacker to obtain credentials or other sensitive information or give users a false sense of security. Information harvested may aid in further attacks. NOTE: This issue was previously discussed in BID 50086 (Apple iPhone/iPad/iPod touch Prior to iOS 5 Multiple Vulnerabilities) but has been given its own record to better document it. Apple iOS is an operating system developed by Apple (Apple) for mobile devices. ---------------------------------------------------------------------- Ovum says ad hoc tools are out-dated. The best practice approach? Fast vulnerability intelligence, threat handling, and setup in one tool. Read the new report on the Secunia VIM: http://secunia.com/products/corporate/vim/ovum_2011_request/ ---------------------------------------------------------------------- TITLE: Apple iOS Multiple Vulnerabilities SECUNIA ADVISORY ID: SA46377 VERIFY ADVISORY: Secunia.com http://secunia.com/advisories/46377/ Customer Area (Credentials Required) https://ca.secunia.com/?page=viewadvisory&vuln_id=46377 RELEASE DATE: 2011-10-14 DISCUSS ADVISORY: http://secunia.com/advisories/46377/#comments AVAILABLE ON SITE AND IN CUSTOMER AREA: * Last Update * Popularity * Comments * Criticality Level * Impact * Where * Solution Status * Operating System / Software * CVE Reference(s) http://secunia.com/advisories/46377/ ONLY AVAILABLE IN CUSTOMER AREA: * Authentication Level * Report Reliability * Secunia PoC * Secunia Analysis * Systems Affected * Approve Distribution * Remediation Status * Secunia CVSS Score * CVSS https://ca.secunia.com/?page=viewadvisory&vuln_id=46377 ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI: * AUTOMATED SCANNING http://secunia.com/vulnerability_scanning/personal/ http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/ DESCRIPTION: Multiple vulnerabilities have been reported in Apple iOS, which can be exploited by malicious people with physical access to disclose certain information and by malicious people to conduct script insertion, cross-site scripting, and spoofing attacks, disclose sensitive information, bypass certain security restrictions, cause a DoS (Denial of Service), and compromise a user's device. 1) An error within the CalDAV component does not properly validate the SSL certificate when synchronizing the calendar, which can be exploited to disclose encrypted information e.g. using a Man-in-the-Middle (MitM) attack. 2) Input passed via invitation notes is not properly sanitised in Calendar before being returned to the user. This can be exploited to insert arbitrary HTML and script code, which will be executed in a user's browser session in context of an affected site when the malicious invitation is being viewed. 3) The CFNetwork component stores a user's AppleID password and username in the log file readable by applications, which can be exploited to disclose the credentials. 4) The CFNetwork component does not properly restrict cross-domain access of HTTP cookies, which can be exploited to access the cookies of another web site. 5) An error exists within CoreFoundation when handling string tokenization. For more information see vulnerability #1 in: SA46339 6) Multiple errors within CoreGraphics when handling the certain freetype fonts can be exploited to corrupt memory. 7) An error within CoreMedia does not properly handle cross-site redirects and can be exploited to disclose video data. 8) An error exits within the Data Access component when handling multiple accounts configured on the same server and can be exploited to disclose the cookie of another account. 9) The application accepts X.509 certificates with MD5 hashes, which could lead to weak cryptographic certificates being used. This can be exploited to disclose encrypted information e.g. using a Man-in-the-Middle (MitM) attack. 10) A design error exists within the implementation of SSL 3.0 and TLS 1.0 protocols. For more information: SA46168 11) An error within ImageIO when handling CCITT Group 4 encoded TIFF files can be exploited to cause a buffer overflow. For more information see vulnerability #1 in: SA43593 12) An error in ImageIO within the handling of CCITT Group 4 encoded TIFF image files can be exploited to cause a heap-based buffer overflow. For more information see vulnerability #9 in: SA45325 13) An error within ICU (International Components for Unicode) can be exploited to cause a buffer overflow. For more information see vulnerability #11 in: SA45054 14) An error within the kernel does not reclaim memory from incomplete TCP connections, which can be exploited to exhaust system resources by connecting to a listening service and cause the device to reset. 15) A NULL-pointer dereference error within the kernel when handling IPv6 socket options can be exploited to cause the device to reset. 16) An error within libxml can be exploited to cause a heap-based buffer overflow. For more information see vulnerability #12 in: SA45325 17) An error within OfficeImport when viewing certain Microsoft Word files can be exploited to cause a buffer overflow. 18) An error within OfficeImport when viewing certain Microsoft Excel files can be exploited to cause a buffer overflow. 19) An indexing error exists in the OfficeImport framework when processing certain records in a Microsoft Word file. For more information see vulnerability #19 in: SA45054 20) An error in the OfficeImport framework when processing records can be exploited to corrupt memory. For more information see vulnerability #28 in: SA43814 21) An error within Safari does not properly handle the "attachment" HTTP Content-Disposition header and can be exploited to conduct cross-site scripting attacks. 22) The parental restrictions feature stores the restrictions passcode in plaintext on disk and can be exploited to disclose the passcode. 23) An error within UIKit does not properly handle "tel:" URIs and can be exploited to cause the device to hang by tricking the user into visiting a malicious website. 24) Some vulnerabilities are caused due to a bundled vulnerable version of WebKit. For more information: SA43519 SA43683 SA43696 SA43859 SA45097 SA45325 SA45325 SA45498 SA45498 SA46339 SA46412 25) The WiFi credentials are stored in a file readable by other applications, which may lead to the credentials being disclosed. Successful exploitation of vulnerabilities #6, #16 \x96 #20, and #24 may allow execution of arbitrary code. SOLUTION: Apply iOS 5 Software Update. PROVIDED AND/OR DISCOVERED BY: 1) Leszek Tasiemski, nSense. 6, 9) Reported by the vendor. The vendor credits: 2) Rick Deacon 3) Peter Quade, qdevelop 4) Erling Ellingsen, Facebook. 7) Nirankush Panchbhai and Microsoft Vulnerability Research (MSVR) 8) Bob Sielken, IBM 14) Wouter van der Veer, Topicus and Josh Enders 15) Thomas Clement, Intego 17) Tobias Klein via iDefense. 18) Tobias Klein, www.trapkit.de 21) Christian Matthies via iDefense and Yoshinori Oota, Business Architects via JP/CERT. 22) An anonymous person 23) Simon Young, Anglia Ruskin University 25) Laurent OUDOT, TEHTRI Security ORIGINAL ADVISORY: Apple: http://support.apple.com/kb/HT4999 nSense: http://www.nsense.fi/advisories/nsense_2011_006.txt OTHER REFERENCES: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ DEEP LINKS: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ EXTENDED DESCRIPTION: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ EXTENDED SOLUTION: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ EXPLOIT: Further details available in Customer Area: http://secunia.com/vulnerability_intelligence/ ---------------------------------------------------------------------- About: This Advisory was delivered by Secunia as a free service to help private users keeping their systems up to date against the latest vulnerabilities. Subscribe: http://secunia.com/advisories/secunia_security_advisories/ Definitions: (Criticality, Where etc.) http://secunia.com/advisories/about_secunia_advisories/ Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor. ---------------------------------------------------------------------- Unsubscribe: Secunia Security Advisories http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org ---------------------------------------------------------------------- . nSense Vulnerability Research Security Advisory NSENSE-2011-006 --------------------------------------------------------------- t2'11 infosec conference special release http://www.t2.fi --------------------------------------------------------------- Affected Vendor: Apple Inc. Affected Product: CalDAV (iOS 3.0 through 4.3.5 for iPhone 3GS and iPhone 4, iOS 3.1 through 4.3.5 for iPod touch (3rd generation) and later, iOS 3.2 through 4.3.5 for iPad) Platform: iOS Impact: Sensitive information interception Vendor response: New version released CVE: CVE-2011-3253 Credit: Leszek / nSense Release date: 12 Oct 2011 Technical details --------------------------------------------------------------- The calendar synchronization feature of iOS fails to validate the SSL certificate provided by the server. Therefore, CalDAV communication can be intercepted by a basic man in the middle attack. As every request contains a HTTP basic authentication header, which contains base64-encoded credentials, it is possible to intercept email account credentials by an attacker that is suitably positioned (e.g. the same LAN, WLAN) or is able to tamper with DNS records pointing to the CalDAV server. The application accepts the untrusted certificate without any warning or prompt, so the attack will go unnoticed by the user. Timeline: 20110407 nSense informed the vendor about the vulnerability 20110409 Vendor started to investigate the issue 20110415 nSense sent a status update request to the vendor 20110415 Vendor provided a status update 20110420 nSense asked the vendor for further information 20110502 nSense resent the previous questions 20110502 Vendor confirmed the vulnerability 20110525 nSense asked the vendor about the patch schedule 20110527 Vendor responded 20110527 nSense asked the vendor for further information 20110531 Vendor responded, unable to provide a date 20110601 nSense asked the vendor for clarification 20110603 Vendor responded 20110603 nSense resent the previous question 20110607 nSense commented the issue, asked the vendor for clarification 20110705 nSense asked the vendor for clarification 20110726 nSense asked the vendor whether 4.3.5 fixed the issue 20110727 Vendor responded. Issue not fixed. 20110728 nSense asked the vendor for further details 20110917 Vendor asked for credit information 20110917 nSense responded 20111002 Vendor confirmed release date 20111012 Vendor releases fixed version of the software 20111012 Vendor releases public advisory Solution: Apple security updates are available via the Software Update mechanism: http://support.apple.com/kb/HT1338 Apple security updates are also available for manual download via: http://www.apple.com/support/downloads/ More information from Apple Inc.: http://support.apple.com/kb/HT1222 Links: http://www.nsense.fi http://www.nsense.dk $$s$$$$s. ,s$$$$s ,S$$$$$s. $$s$$$$s. ,s$$$$s ,S$$$$$s. $$$ `$$$ ($$( $$$ `$$$ $$$ `$$$ ($$( $$$ `$$$ $$$ $$$ `^$$s. $$$$$$$$$ $$$ $$$ `^$$s. $$$$$$$$$ $$$ $$$ )$$) $$$ $$$ $$$ )$$) $$$ $$$ $$$ ^$$$$$$7 `7$$$$$P $$$ $$$ ^$$$$$$7 `7$$$$$P D r i v e n b y t h e c h a l l e n g e _ _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

remote

TYPE

information disclosure

CONFIGURATIONS

EXPLOIT AVAILABILITY

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

Leszek Tasiemski of nSense

SOURCES

LAST UPDATE DATE

2025-04-11T19:56:20.079000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE