PostgreSQL ASCII escaping SQL injection

postgresql-ascii-sql-injection (26628) The risk level is classified as MediumMedium Risk


PostgreSQL is vulnerable to SQL injection. PostgreSQL fails to properly escape certain character encodings that use the ASCII code for a backslash as the trailing byte in a multibyte character. If a PostgreSQL-based Web application uses one of the affected character encoding sets, a remote attacker could exploit this vulnerability by sending specially-crafted SQL statements containing invalid multibyte encoded characters which would allow the attacker to bypass standard string escaping restrictions and possibly view, add, modify or delete information in the back-end database.

Note: This vulnerability could be exploited using a Web application that uses one of the following character sets:

  • SJIS
  • BIG5
  • GBK
  • GB18030
  • UHC

MailManager, which uses a vulnerable version of PostgreSQL, is also affected by this vulnerability.


Data Manipulation


Upgrade to the latest version of PostgreSQL (7.3.15 or later), (7.4.13 or later), (8.0.8 or later) or (8.1.4 or later), available from the PostgreSQL Web site. See References.

For Red Hat Linux:
Refer to RHSA-2006:0526-8 for patch, upgrade, or suggested workaround information. See References.

For Debian GNU/Linux:
Refer to DSA-1086-1 for patch, upgrade, or suggested workaround information. See References.

For Gentoo Linux:
Refer to Gentoo Linux Security Announcement GLSA 2006-07-04 for patch, upgrade, or suggested workaround information. See References.

For SUSE Linux:
Refer to SUSE Security Announcement SUSE-SA:2006:030 for patch, upgrade, or suggested workaround information. See References.

For other distributions:
Contact your vendor for upgrade or patch information.


  • BugTraq Mailing List, Tue May 23 2006 - 12:47:42 CDT: PostgreSQL security releases 8.1.4, 8.0.8, 7.4.13, 7.3.15.
  • Full-Disclosure Mailing List, Wed May 24 2006 - 16:05:56 CDT: rPSA-2006-0080-1 postgresql postgresql-server.
  • MailManager Web site: Logicalware Products: MailManager.
  • pgsql-announce Mailing List, Tue, 23 May 2006 08:30:21 -0700 : Security Releases for All Active Versions .
  • PostgreSQL Web site: Technical Information on Encoding-Based SQL Injection Exploit.
  • PostgreSQL Web site: 8.1.4 et. al. Security Release Information.
  • PostgreSQL Web site: PostgreSQL: Downloads.
  • ASA-2006-113: postgresql security update (RHSA-2006-0526)
  • BID-18092: PostgreSQL Multibyte Character Encoding SQL Injection Vulnerabilities
  • CVE-2006-2314: PostgreSQL 8.1.x before 8.1.4, 8.0.x before 8.0.8, 7.4.x before 7.4.13, 7.3.x before 7.3.15, and earlier versions allows context-dependent attackers to bypass SQL injection protection methods in applications that use multibyte encodings that allow the \ (backslash) byte 0x5c to be the trailing byte of a multibyte character, such as SJIS, BIG5, GBK, GB18030, and UHC, which cannot be handled correctly by a client that does not understand multibyte encodings, aka a second variant of Encoding-Based SQL Injection. NOTE: it could be argued that this is a class of issue related to interaction errors between the client and PostgreSQL, but a CVE has been assigned since PostgreSQL is treating this as a preventative measure against this class of problem.
  • CVE-2006-2824: Logicalware MailManager before 2.0.10 does not remove 0xc8 0x27 (0xc8 followed by a single-quote character) from the data stream to the server, which allows remote attackers to modify data and gain administrative access when PostgreSQL is used, aka bug #1494281 - Postgres encoding security hole. NOTE: while this issue involves PostgreSQL, it is specific to MailManager's interface to PostgreSQL and is therefore a different vulnerability than CVE-2006-2313 and CVE-2006-2314.
  • DSA-1087: postgresql -- programming error
  • GLSA-200607-04: PostgreSQL: SQL injection
  • MDKSA-2006:098: postgresql
  • OSVDB ID: 25731: PostgreSQL Single Quote Escaping Filter Bypass
  • RHSA-2006-0526: postgresql security update
  • SA20231: PostgreSQL Encoding-Based SQL Injection Vulnerability
  • SA20303: MailManager PostgreSQL Encoding-Based SQL Injection
  • SA20653: Avaya Products PostgreSQL Multiple Vulnerabilities
  • SECTRACK ID: 1016142: PostgreSQL Encoding Processes May Let Remote Users Inject SQL Commands
  • SUSE-SA:2006:030: PostgreSQL SQL injection attacks
  • SUSE-SR:2006:021: SUSE Security Summary Report

Platforms Affected:

  • Canonical Ubuntu 5.04
  • Canonical Ubuntu 5.10
  • Canonical Ubuntu 6.06 LTS
  • Debian Debian Linux 3.1
  • Gentoo Linux
  • MandrakeSoft Mandrake Linux 2006
  • MandrakeSoft Mandrake Linux 2006 X86_64
  • MandrakeSoft Mandrake Linux LE2005 X86_64
  • MandrakeSoft Mandrake Linux LE2005
  • MandrakeSoft Mandrake Linux Corporate Server 3.0
  • MandrakeSoft Mandrake Linux Corporate Server 3.0 X86_64
  • PostgreSQL PostgreSQL 7.3
  • PostgreSQL PostgreSQL 7.3.1
  • PostgreSQL PostgreSQL 7.3.10
  • PostgreSQL PostgreSQL 7.3.11
  • PostgreSQL PostgreSQL 7.3.12
  • PostgreSQL PostgreSQL 7.3.13
  • PostgreSQL PostgreSQL 7.3.14
  • PostgreSQL PostgreSQL 7.3.2
  • PostgreSQL PostgreSQL 7.3.3
  • PostgreSQL PostgreSQL 7.3.4
  • PostgreSQL PostgreSQL 7.3.5
  • PostgreSQL PostgreSQL 7.3.6
  • PostgreSQL PostgreSQL 7.3.7
  • PostgreSQL PostgreSQL 7.3.8
  • PostgreSQL PostgreSQL 7.3.9
  • PostgreSQL PostgreSQL 7.4
  • PostgreSQL PostgreSQL 7.4.1
  • PostgreSQL PostgreSQL 7.4.10
  • PostgreSQL PostgreSQL 7.4.11
  • PostgreSQL PostgreSQL 7.4.12
  • PostgreSQL PostgreSQL 7.4.2
  • PostgreSQL PostgreSQL 7.4.3
  • PostgreSQL PostgreSQL 7.4.4
  • PostgreSQL PostgreSQL 7.4.5
  • PostgreSQL PostgreSQL 7.4.6
  • PostgreSQL PostgreSQL 7.4.7
  • PostgreSQL PostgreSQL 7.4.8
  • PostgreSQL PostgreSQL 7.4.9
  • PostgreSQL PostgreSQL 8.0
  • PostgreSQL PostgreSQL 8.0.1
  • PostgreSQL PostgreSQL 8.0.2
  • PostgreSQL PostgreSQL 8.0.3
  • PostgreSQL PostgreSQL 8.0.4
  • PostgreSQL PostgreSQL 8.0.5
  • PostgreSQL PostgreSQL 8.0.6
  • PostgreSQL PostgreSQL 8.0.7
  • PostgreSQL PostgreSQL 8.1
  • PostgreSQL PostgreSQL 8.1.1
  • PostgreSQL PostgreSQL 8.1.2
  • PostgreSQL PostgreSQL 8.1.3
  • RedHat Enterprise Linux 3 WS
  • RedHat Enterprise Linux 3 Desktop
  • RedHat Enterprise Linux 3 AS
  • RedHat Enterprise Linux 3 ES
  • RedHat Enterprise Linux 4 WS
  • RedHat Enterprise Linux 4 ES
  • RedHat Enterprise Linux 4 Desktop
  • RedHat Enterprise Linux 4 AS
  • SuSE Linux Enterprise Server 8
  • SUSE SuSE Linux 10.0
  • SUSE SuSE Linux 10.1
  • SUSE SuSE Linux 9.1
  • SUSE SuSE Linux 9.2
  • SUSE SuSE Linux 9.3
  • SuSE SuSE SLES 9
  • Turbolinux Turbolinux 10 Desktop
  • Turbolinux Turbolinux 10 F...
  • Turbolinux Turbolinux 10 Server
  • Turbolinux Turbolinux 10 Server x64 Ed
  • Turbolinux Turbolinux 7 Server
  • Turbolinux Turbolinux 8 Server
  • Turbolinux Turbolinux 8 Workstation
  • Turbolinux Turbolinux Home
  • Turbolinux Turbolinux Multimedia
  • Turbolinux Turbolinux Personal
  • Turbolinux Turbolinux Appliance Server 1.0 Hosting Ed
  • Turbolinux Turbolinux Appliance Server 1.0 Workgroup Ed
  • Turbolinux Turbolinux Appliance Server 2.0


May 23, 2006

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 ignore thisxforceignore this@ignore thisus.ignore thisibm.comignore this

Return to the main page