libxslt exsltCryptoRc4EncryptFunction and exsltCryptoRc4DecryptFunction function buffer overflow

libxslt-multiple-crypto-bo (44141) The risk level is classified as HighHigh Risk

Description:

libxslt is vulnerable to a heap-based buffer overflow, caused by improper bounds checking by the exsltCryptoRc4EncryptFunction and exsltCryptoRc4DecryptFunction functions. By persuading a victim to visit a Web site containing a specially-crafted stylesheet, a remote attacker could overflow a buffer and execute arbitrary code on the system or cause the affected application to crash.

*CVSS:

Base Score: 6.8
  Access Vector: Network
  Access Complexity: Medium
  Authentication: None
  Confidentiality Impact: Partial
  Integrity Impact: Partial
  Availability Impact: Partial
 
Temporal Score: 5.3
  Exploitability: Proof-of-Concept
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Gain Access

Remedy:

Apply the appropriate update for your system. See References.

References:

  • CESA-2008-003 - rev 1: Heap-based buffer overflow in libxslt.
  • oCERT Advisories #2008-009: libxslt heap overflow.
  • XSLT Web page: libxslt.
  • ASA-2008-373: libxslt security update (RHSA-2008-0649)
  • BID-30467: libxslt RC4 Encryption and Decryption Functions Buffer Overflow Vulnerability
  • CVE-2008-2935: Multiple heap-based buffer overflows in the rc4 (1) encryption (aka exsltCryptoRc4EncryptFunction) and (2) decryption (aka exsltCryptoRc4DecryptFunction) functions in crypto.c in libexslt in libxslt 1.1.8 through 1.1.24 allow context-dependent attackers to execute arbitrary code via an XML file containing a long string as an argument in the XSL input.
  • DSA-1624: libxslt -- buffer overflows
  • GLSA-200808-06: libxslt: Execution of arbitrary code
  • MDVSA-2008:160: libxslt
  • RHSA-2008-0649: Moderate: libxslt security update
  • SA31230: libxslt "crypto:rc4_encrypt" and "crypto:rc4_decrypt" Buffer Overflow Vulnerabilities
  • SECTRACK ID: 1020596: libxslt Heap Overflow in exsltCryptoRc4EncryptFunction() May Let Remote Users Execute Arbitrary Code
  • USN-633-1: libxslt vulnerabilities
  • VUPEN/ADV-2008-2266: libxslt rc4_encrypt and rc4_decrypt Buffer Overflow Issues

Platforms Affected:

  • Canonical Ubuntu 6.06 LTS
  • Canonical Ubuntu 7.04
  • Canonical Ubuntu 7.10
  • Canonical Ubuntu 8.04 LTS
  • Debian Debian Linux 4.0
  • Gentoo Linux
  • MandrakeSoft Mandrake Linux 2007.1
  • MandrakeSoft Mandrake Linux 2007.1 X86_64
  • MandrakeSoft Mandrake Linux 2008.0
  • MandrakeSoft Mandrake Linux 2008.0 X86_64
  • MandrakeSoft Mandrake Linux 2008.1 X86_64
  • MandrakeSoft Mandrake Linux 2008.1
  • MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 4.0
  • RedHat Enterprise Linux 4 ES
  • RedHat Enterprise Linux 4 WS
  • RedHat Enterprise Linux 4 AS
  • RedHat Enterprise Linux 4 Desktop
  • RedHat Enterprise Linux 5
  • RedHat Enterprise Linux 5 Client
  • RedHat Enterprise Linux 5 Client Workstation
  • XMLsoft libxslt 1.1.24

Reported:

Jul 31, 2008

The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

For corrections or additions please email xforce@iss.net

Return to the main page

* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

About IBM Internet Security Systems

IBM Internet Security Systems is a trusted security advisor to thousands of the world's leading businesses and governments, helping to provide pre-emptive protection for networks, desktops and servers. The IBM Proventia? integrated security platform is designed to automatically protect against both known and unknown threats, helping to keep networks up and running and shield customers from online attacks before they impact business assets. IBM Internet Security Systems products and services are based on the proactive security intelligence of its X-Force? research and development team ? an unequivocal world authority in vulnerability and threat research. The IBM Internet Security Systems product line is also complemented by comprehensive Managed Security Services and Professional Security Services. For more information, visit the IBM Internet Security Systems Web site at www.iss.net or call 800-776-2362.