Libxml2 xmlCurrentChar() denial of service
| libxml2-xmlcurrentchar-dos (39610) |  Medium Risk |
Description:
Libxml2 is vulnerable to a denial of service, caused by a failure to check for valid UTF-8 ent sequences by the xmlCurrentChar() function. By sending specially-crafted UTF-8 sequences, a remote attacker could cause the library to enter into an infinite loop, resulting in a denial of service.
*CVSS:
| Base Score: | 5 |
| Access Vector: | Network |
| Access Complexity: | Low |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Partial |
| Temporal Score: | 3.7 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
Upgrade to the latest version of Libxml2 (2.6.31 or later), available from the XMLsoft Web site. See References.
For other distributions:
Apply the appropriate update for your system. See References.
References:
- Apple Web site: About the security content of iPhone v2.0 and iPod touch v2.0.
- BugTraq Mailing List, Fri Mar 28 2008 - 19:32:21 CDT: VMSA-2008-0006 Updated libxml2 service console package.
- Red Hat Bugzilla Bug 425927: CVE-2007-6284 libxml2: infinite loop in UTF-8 decoding.
- Sun Alert ID: 103201: Security Vulnerability in the libxml2 Library may Lead to a Denial of Service (DoS)..
- Sun Alert ID: 201514: Security Vulnerability in the libxml2 Library May Lead to a Denial of Service (DoS).
- VideoLAN Web site: Changes between 0.8.6g and 0.8.6h.
- XMLsoft Web site: Libxml2.
- ASA-2008-047: Security Vulnerability in the libxml2 Library may Lead to a Denial of Service (DoS). (Sun 103201)
- ASA-2008-050: libxml2 security update (RHSA-2008-0032)
- BID-27248: libxml2 'xmlCurrentChar()' UTF-8 Parsing Remote Denial of Service Vulnerability
- BID-30186: Apple iPhone and iPod Touch Prior to Version 2.0 Multiple Remote Vulnerabilities
- CVE-2007-6284: The xmlCurrentChar function in libxml2 before 2.6.31 allows context-dependent attackers to cause a denial of service (infinite loop) via XML containing invalid UTF-8 sequences.
- DSA-1461: libxml2 -- missing input validation
- GLSA-200801-20: libxml2: Denial of Service
- MDVSA-2008:010: Updated libxml2 packages fix DoS vulnerability
- RHSA-2008-0032: Important: libxml2 security update
- SA28444: Libxml2 UTF-8 Parsing Denial of Service Vulnerability
- SA28466: Sun Solaris Libxml2 UTF-8 Parsing Denial of Service
- SA28740: Avaya Products Libxml2 UTF-8 Parsing Denial of Service
- SA30560: VLC Media Player GnuTLS and Libxml2 Vulnerabilities
- SA31074: Apple iPhone / iPod touch Multiple Vulnerabilities
- SECTRACK ID: 1019181: Libxml2 UTF-8 Validation Flaw Lets Remote Users Deny Service
- SUSE-SR:2008:002: SUSE Security Summary Report
- USN-569-1: libxml2 vulnerability
- VUPEN/ADV-2008-0117: Libxml2 xmlCurrentChar() UTF-8 Parsing Denial of Service Vulnerability
- VUPEN/ADV-2008-0144: Sun Solaris Security Update Fixes Libxml2 Denial of Service Vulnerability
- VUPEN/ADV-2008-1033: VMware Security Update Fixes Libxml2 Denial of Service Vulnerability
- VUPEN/ADV-2008-1762: VLC Security Update Fixes GnuTLS and Libxml2 Vulnerabilities
- VUPEN/ADV-2008-2094: Apple iPhone and iPod touch Multiple Code Execution Vulnerabilities
Platforms Affected:
- Apple iPhone 1.0
- Apple iPhone 1.1.1
- Apple iPhone 1.1.2
- Apple iPhone 1.1.3
- Apple iPhone 1.1.4
- Apple iPod touch 1.1
- Apple iPod touch 1.1.1
- Apple iPod touch 1.1.2
- Apple iPod touch 1.1.3
- Apple iPod touch 1.1.4
- Canonical Ubuntu 6.06 LTS
- Canonical Ubuntu 6.10
- Canonical Ubuntu 7.04
- Canonical Ubuntu 7.10
- Debian Debian Linux 3.1
- Debian Debian Linux 4.0
- Gentoo Linux
- MandrakeSoft Mandrake Linux 2007
- MandrakeSoft Mandrake Linux 2007 X86_64
- MandrakeSoft Mandrake Linux 2007.1 X86_64
- MandrakeSoft Mandrake Linux 2007.1
- MandrakeSoft Mandrake Linux 2008.0 X86_64
- MandrakeSoft Mandrake Linux 2008.0
- MandrakeSoft Mandrake Linux Corporate Server 3.0 X86_64
- MandrakeSoft Mandrake Linux Corporate Server 3.0
- MandrakeSoft Mandrake Linux Corporate Server 4.0
- MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
- RedHat Enterprise Linux 2.1 WS
- RedHat Enterprise Linux 2.1 ES
- RedHat Enterprise Linux 2.1 AS
- RedHat Enterprise Linux 3 WS
- RedHat Enterprise Linux 3 Desktop
- RedHat Enterprise Linux 3 AS
- RedHat Enterprise Linux 3 ES
- RedHat Enterprise Linux 4 AS
- RedHat Enterprise Linux 4 ES
- RedHat Enterprise Linux 4 WS
- RedHat Enterprise Linux 4 Desktop
- RedHat Enterprise Linux 5
- RedHat Enterprise Linux 5 Client
- RedHat Enterprise Linux 5 Client Workstation
- RedHat Linux Advanced Workstation 2.1 Itanium
- Sun Solaris 10 x86
- Sun Solaris 10 SPARC
- Sun Solaris 9 SPARC
- Sun Solaris 9 x86
- VideoLAN VLC Media Player 0.8.6g
- VMware ESX Server 2.5.4
- VMware ESX Server 2.5.5
- XMLsoft Libxml2 prior to 2.6.31
Reported:
Dec 17, 2007
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