Libxml2 xmlNanoFTPScanProxy function buffer overflow
| libxml2-xmlnanoftpscanproxy-bo (17875) |  High Risk |
Description:
Libxml2 is vulnerable to a buffer overflow when parsing a proxy URL containing FTP information. By sending a specially-crafted URL request to the xmlNanoFTPScanProxy function of the nanoftp.c file, a remote attacker could overflow a buffer and cause a denial of service or possibly execute arbitrary code on the system.
Platforms Affected:
- Canonical, Ubuntu 4.10
- Conectiva, Linux 10
- Conectiva, Linux 9.0
- Debian, Debian Linux 3.0
- Gentoo, Linux
- MandrakeSoft, Mandrake Linux 10.0 AMD64
- MandrakeSoft, Mandrake Linux 10.0
- MandrakeSoft, Mandrake Linux 10.1
- MandrakeSoft, Mandrake Linux 10.1 X86_64
- MandrakeSoft, Mandrake Linux 9.2 AMD64
- MandrakeSoft, Mandrake Linux 9.2
- MandrakeSoft, Mandrake Linux Corporate Server 2.1 X86_64
- MandrakeSoft, Mandrake Linux Corporate Server 2.1
- Novell, Linux Desktop 9
- OpenPKG, OpenPKG 2.1
- OpenPKG, OpenPKG 2.2
- OpenPKG, OpenPKG CURRENT
- RedHat, Enterprise Linux 2.1 AW
- RedHat, Enterprise Linux 2.1 WS
- RedHat, Enterprise Linux 2.1 AS
- RedHat, Enterprise Linux 2.1 ES
- RedHat, Enterprise Linux 3 Desktop
- RedHat, Enterprise Linux 3 AS
- RedHat, Enterprise Linux 3 WS
- RedHat, Enterprise Linux 3 ES
- RedHat, Linux Advanced Workstation 2.1 Itanium
- SuSE, Linux Enterprise Server 9
- SuSE, SuSE Linux 9.1
- SuSE, SuSE Linux 9.2
- Trustix, Enterprise Server 2
- Trustix, Secure Linux 2.0
- Trustix, Secure Linux 2.1
- Turbolinux, Turbolinux 10 Desktop
- Turbolinux, Turbolinux 10 F...
- Turbolinux, Turbolinux 10 Server
- Turbolinux, Turbolinux 7 Server
- Turbolinux, Turbolinux 7 Workstation
- Turbolinux, Turbolinux 8 Server
- Turbolinux, Turbolinux 8 Workstation
- Turbolinux, Turbolinux Appliance Server 1.0
- Turbolinux, Turbolinux Home
- Turbolinux, Turbolinux Appliance Server 1.0 Hosting Ed
- Turbolinux, Turbolinux Appliance Server 1.0 Workgroup Ed
- XMLsoft, Libxml2 2.6.12
- XMLsoft, Libxml2 2.6.13
Remedy:
For Red Hat Linux containing the libxml package:
Upgrade to the latest libxml package, as listed below. Refer to RHSA-2004:650-03 for more information. See References.
Red Hat Enterprise Linux AS (v. 2.1), ES (v. 2.1), WS (vs. 2.1), and Advanced Workstation 2.1 for the Itanium Processor: 1.8.14-3 or later
Red Hat Enterprise Linux Red Hat Desktop (v. 3), AS (v. 3), ES (v. 3), WS (v. 3): 1.8.17-9.2 or later
For Trustix Secure Linux:
Upgrade to the latest libxml2 package, as listed below. Refer to Trustix Secure Linux Security Advisory #2004-0055 for more information. See References.
Trustix Secure Linux 2.0: 2.6.15-0.1tr or later
Trustix Secure Linux 2.1 and Enterprise Linux 2: 2.6.15-1tr or later
Trustix Operating System - Enterprise Server 2: 2.6.15-1tr or later
For Debian GNU/Linux 3.0 (alias woody):
Upgrade to the latest libxml package (1.8.17-2woody2 or later), as listed in DSA-582-1. See References.
For Gentoo Linux:
Upgrade to the latest version of libxml2 (2.6.15 or later), as listed in GLSA 200411-05. See References.
For Ubuntu Linux:
Upgrade to the latest libxml2 package (2.6.11-3ubuntu1.1 or later), as listed in USN-10-1 October 28, 2004. See References.
For Mandrake Linux:
Upgrade to the latest libxml or libxml2 package, as listed in MandrakeSoft Security Advisory MDKSA-2004:127 for more information. See References.
For Red Hat Linux:
Upgrade to the latest libxml2 package, as listed below. Refer to RHSA-2004:615-11 for more information. See References.
Red Hat Enterprise Linux AS (v. 2.1), ES (v. 2.1), WS (v. 2.1), and Red Hat Linux Advanced Workstation 2.1 for the Itanium Processor: 2.4.19-6.ent or later
Red Hat Enterprise Linux AS (v. 3), ES (v. 3), WS (v. 3), Desktop: 2.5.10-7.x86_64 or later
For Conectiva Linux:
Upgrade to the latest libxml2 package, as listed below. Refer to Conectiva Linux Security Announcement CLSA-2004:890 for more information. See References.
Conectiva Linux 9: 1.8.17-12238U90_1cl later
Conectiva Linux 10.0: 1.8.17-58912U10_1cl or later
For OpenPKG:
Upgrade to the latest libxml package, as listed in OpenPKG Security Advisory OpenPKG-SA-2004.050. See References.
OpenPKG CURRENT: 2.6.15-20041028 or later
OpenPKG 2.2: 2.6.14-2.2.1 or later
OpenPKG 2.1: 2.6.11-2.1.1 or later
For Turbolinux:
Upgrade to the latest libxml package, as listed below. Refer to Turbolinux Security Advisory TLSA-2005-11 for more information. See References.
Turbolinux Appliance Server 1.0 Hosting Edition: 1.8.17-3 or later
Turbolinux Appliance Server 1.0 Workgroup Edition: 1.8.17-3 or later
Turbolinux Home: 1.8.17-3 or later
Turbolinux 10 Desktop: 1.8.17-3 or later
Turbolinux 8 Server: 1.8.17-3 or later
Turbolinux 8 Workstation: 1.8.17-3 or later
Turbolinux 7 Server: 1.8.14-2 or later
Turbolinux 7 Workstation: 1.8.14-2 or later
For Turbolinux:
Upgrade to the latest libxml2 package, as listed below. Refer to Turbolinux Security Advisory TLSA-2005-12 for more information. See References.
Turbolinux Appliance Server 1.0 Hosting Edition: 2.4.22-3 or later
Turbolinux Appliance Server 1.0 Workgroup Edition: 2.4.22-3 or later
Turbolinux 10 Server: 2.6.11-3 or later
Turbolinux Home: 2.6.2-3 or later
Turbolinux 10 Desktop: 2.6.2-3 or later
Turbolinux 8 Server: 2.4.22-3 or later
Turbolinux 8 Workstation: 2.4.19-3 or later
Turbolinux 7 Server: 2.4.28-3 or later
Turbolinux 7 Workstation: 2.4.28-3 or later
For other distributions:
Contact your vendor for upgrade or patch information.
Consequences:
Gain Access
References:
- BugTraq Mailing List, Mon Oct 25 2004 - 19:51:32 CDT , libxml2 remote buffer overflows (not in xml parsing code though) at http://archives.neohapsis.com/archives/bugtraq/2004-10/0267.html.
- CIAC Information Bulletin P-029, libxml and libxml2 Buffer Overflow at http://www.ciac.org/ciac/bulletins/p-029.shtml.
- CIAC Information Bulletin P-073, Updated "libxml" Packages for Versions Prior to 2.6.14 at http://www.ciac.org/ciac/bulletins/p-073.shtml.
- CIAC Information Bulletin P-116, Apple Security Update 2005-001 for Mac OS X at http://www.ciac.org/ciac/bulletins/p-116.shtml.
- Conectiva Linux Security Announcement CLSA-2004:890, Fixes for libxml2 buffer overflow vulnerabilities at http://distro.conectiva.com.br/atualizacoes/index.php?id=a&anuncio=000890.
- Trustix Secure Linux Security Advisory #2004-0055, multiple security issues at http://www.trustix.net/errata/2004/0055/.
- Trustix Secure Linux Security Advisory #2004-0055, multiple security issues at http://www.trustix.net/errata/2004/0055/.
- XML C parser and toolkit of Gnome Web site, Libxml2 at http://www.xmlsoft.org/.
- BID-11526: Libxml2 Multiple Remote Stack Buffer Overflow Vulnerabilities
- CVE-2004-0989: Multiple buffer overflows in libXML 2.6.12 and 2.6.13 (libxml2), and possibly other versions, may allow remote attackers to execute arbitrary code via (1) a long FTP URL that is not properly handled by the xmlNanoFTPScanURL function, (2) a long proxy URL containing FTP data that is not properly handled by the xmlNanoFTPScanProxy function, and other overflows related to manipulation of DNS length values, including (3) xmlNanoFTPConnect, (4) xmlNanoHTTPConnectHost, and (5) xmlNanoHTTPConnectHost.
- DSA-582: libxml -- buffer overflow
- GLSA-200411-05: libxml2: Remotely exploitable buffer overflow
- MDKSA-2004:127: Updated libxml and libxml2 packages fix multiple vulnerabilities
- OpenPKG-SA-2004.050: Libxml
- OSVDB ID: 11179: libxml2 FTP URL Processing Overflow
- OSVDB ID: 11180: libxml2 DNS Reply Overflows
- OSVDB ID: 11324: libxml2 Proxy FTP URL Processing Overflow
- RHSA-2004-615: libxml2 security update
- RHSA-2004-650: libxml security update
- SA13000: Libxml2 Multiple Buffer Overflows
- SECTRACK ID: 1011941: Libxml2 URL Parsing and DNS Resolution Buffer Overflows May Let Remote Users Execute Arbitrary Code
- SUSE-SA:2004:040: samba: remote denial of service
- SUSE-SR:2005:001: SUSE Security Summary Report
Reported:
Oct 25, 2004
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