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Vulnerability Alert

Apache HTTP Server mod_rewrite Log File Manipulation Vulnerability

 
Threat Type:CWE-20: Input Validation
IntelliShield ID:29497
Version:7
First Published:2013 May 30 19:48 GMT
Last Published:2013 September 26 17:27 GMT
Port: Not available
CVE:CVE-2013-1862
BugTraq ID:59826
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Harassment
CVSS Base:4.3 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:3.7
 
 
Version Summary:Oracle has released a security advisory and patches to address the Apache HTTP server mod_rewrite log file manipulation vulnerability.
 
 
Description
A vulnerability in the do_rewritelog() function of Apache HTTP Server could allow an unauthenticated, remote attacker to gain access to sensitive information.

The vulnerability is due to improper handling of certain escape sequences by the affected software. An unauthenticated, remote attacker could exploit this vulnerability by sending a crafted HTTP request to the targeted device. Processing the crafted request could allow certain escape sequences to be written to the log file. If an attacker views these sequences in the log file with a terminal emulator, the attacker could execute arbitrary commands on the targeted system.

Apache has confirmed this vulnerability and released updated software.
 
Warning Indicators
The following products are vulnerable:
  • Apache HTTP Server version 2.2.24 and prior
  • Apache HTTP Server versions prior to 2.0.65
 
IntelliShield Analysis
To exploit the vulnerability, the attacker must submit crafted HTTP requests to the system. In a typical network configuration, the attacker would likely need access to trusted, internal networks to submit crafted requests to the targeted system. This access requirement could reduce the likelihood of a successful exploit.

According to the vendor, the updated Apache HTTP Server version 2.0.65 will be released in September 2013.
 
Vendor Announcements
Apache.org has released security advisories at the following links: Revision 1469311 and CVE-2013-1862

FreeBSD has released a VuXML document at the following link: apache22 -- mod_rewrite vulnerability

HP has released security bulletin c03922406 at the following link: HPSBUX02927 SSRT101288

MontaVista Software released a security alert on July 11, 2013, for registered users at the following link: MontaVista Security Fixes

Oracle has released patches for registered users at the following link: Solaris 11.1 11.1.11.4.0

Red Hat has released an official CVE statement and security advisories for bug 953729 at the following links: CVE-2013-1862, RHSA-2013:1133, RHSA-2013:1134, RHSA-2013:1207, RHSA-2013:1208, and RHSA-2013:1209
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to gain access to log files on a targeted system. If successful and viewed in a terminal emulator, the attacker could use the vulnerability to execute arbitrary commands on the targeted system, which could be leveraged to conduct further attacks.
 
Technical Information
The vulnerability is due to improper handling of certain escape sequences by the do_rewritelog() function of the affected software when writing to the log file.

An unauthenticated, remote attacker could exploit this vulnerability by sending a crafted HTTP request to the targeted device. Processing the crafted request could allow certain escape sequences to be written to the log file. If an attacker views these sequences in the log file with a terminal emulator, the attacker could gain the ability to execute arbitrary commands on the targeted system.
 
Safeguards
Administrators are advised to apply the appropriate updates.

Administrators are advised to allow only trusted users to have network access.

Administrators are advised to monitor affected systems.
 
Patches/Software
Apache.org has released updated software at the following links:

Apache 2.2.25
Apache HTTP Server 2.0.65

FreeBSD releases ports collection updates at the following link: Ports Collection Index

HP has released updated software for registered users at the following links:

HP-UX 11i Release
HPUXWS22ATW-B328-11-23-32.depot
HPUXWS22ATW-B328-11-23-64.depot
HPUXWS22ATW-B328-11-31-32.depot

MontaVista Software has released updated software at the following links:

Pro 5.0
CGE 5.1
Mobilinux 5.0

Oracle has released a security advisory at the following link: CVE-2013-1862

Red Hat has released updated software for registered subscribers at the following link: Red Hat Network

Red Hat packages can be updated on Red Hat Enterprise Linux versions 5 and later using the yum tool.
 
Alert History
 
Version 6, September 5, 2013, 3:18 PM: Red Hat has released additional security advisories and updated software to address the Apache HTTP server mod_rewrite log file manipulation vulnerability.

Version 5, August 6, 2013, 12:30 PM: Red Hat has released additional security advisories and updated software to address the Apache HTTP server mod_rewrite log file manipulation vulnerability.

Version 4, July 12, 2013, 4:54 PM: MontaVista Software has released a security alert and updated software to address the Apache HTTP server mod_rewrite log file manipulation vulnerability.

Version 3, July 11, 2013, 1:51 PM: Apache has released an additional security advisory and updated software to address the Apache HTTP server mod_rewrite log file manipulation vulnerability.

Version 2, July 8, 2013, 12:41 PM: FreeBSD has released a VuXML document and updated ports collection to address the Apache HTTP Server mod_rewrite log file manipulation vulnerability.

Version 1, May 30, 2013, 7:48 PM: Apache HTTP Server contains a vulnerability that could allow an unauthenticated, remote attacker to gain access to sensitive information. Updates are available.


Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
Apache Software FoundationApache HTTP Server 2.0 Base | 2.0.28 Base | 2.0.29 Base | 2.0.30 Base | 2.0.31 Base | 2.0.32 Base | 2.0.33 Base | 2.0.34 Base | 2.0.35 Base | 2.0.36 Base | 2.0.37 Base | 2.0.38 Base | 2.0.39 Base | 2.0.40 Base | 2.0.41 Base | 2.0.42 Base | 2.0.43 Base | 2.0.44 Base | 2.0.45 Base | 2.0.46 Base | 2.0.47 Base | 2.0.48 Base | 2.0.49 Base | 2.0.50 Base | 2.0.51 Base | 2.0.52 Base | 2.0.53 Base | 2.0.54 Base | 2.0.55 Base | 2.0.56 Base | 2.0.57 Base | 2.0.58 Base | 2.0.59 Base | 2.0.61 Base | 2.0.63 Base | 2.0.64 Base | 2.2.20 Base | 2.2.21 Base | 2.2.22 Base | 2.2.23 Base | 2.2.24 Base
CiscoCisco Unified Computing System (Managed) 1.4 Base, (1i), (1j), (1m), (3i), (3l), (3m), (3q), (3s), (3u), (3y), (4f), (4g), (4i), (4j), (4k) | 2.0 Base, (1m), (1q), (1s), (1t), (1w), (1x), (2m), (2q), (2r), (3a), (3b), (3c), (4a), (4b), (4d), (5a), (5b), (5c) | 2.1 Base, (1a), (1b), (1d), (1e), (1f), (2a) | 2.2 Base

Associated Products:
FreeBSD ProjectFreeBSD 6.3 Base | 6.4 Base | 7.0 Base | 7.1 Base | 7.2 Base | 7.3 Base | 7.4 Base | 8.0 Base | 8.1 Base | 8.2 Base | 8.3 Base | 9.0 Base | 9.1 Base
HPHP-UX 11.23 Base | 11.31 Base
MontaVistaMontaVista Linux Professional 5.0 | Mobilinux 5.0 | CGE 5.1
Oracle CorporationSolaris 11.1 Base
Red Hat, Inc.JBoss Enterprise Application Platform 6 EL5 IA-32, x86_64 | 6 EL6 IA-32, x86_64
Red Hat, Inc.JBoss Enterprise Web Server EL5 IA-32, x86_64 | EL6 IA-32, x86_64




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