Perl PERLIO_DEBUG environment variable buffer overflow
| perl-perliodebug-bo (19208) |  High Risk |
Description:
Perl (Practical Extraction and Reporting Language) is vulnerable to a buffer overflow, caused by improper bounds checking of user-supplied input in the PERLIO_DEBUG environment variable. By sending a specially-crafted long PERLIO_DEBUG environment variable to Perl, a local attacker could overflow a buffer and execute arbitrary code on the system with root privileges.
Platforms Affected:
- Canonical, Ubuntu 4.10
- Gentoo, Linux
- Larry Wall, Perl 5.x
- MandrakeSoft, Mandrake Linux 10.0
- MandrakeSoft, Mandrake Linux 10.0 AMD64
- MandrakeSoft, Mandrake Linux 10.1 X86_64
- MandrakeSoft, Mandrake Linux 10.1
- 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
- MandrakeSoft, Mandrake Linux Corporate Server 3.0 X86_64
- MandrakeSoft, Mandrake Linux Corporate Server 3.0
- RadiSys Corporation, OS-9
- RedHat, Enterprise Linux 3 WS
- RedHat, Enterprise Linux 3 ES
- RedHat, Enterprise Linux 3 AS
- RedHat, Enterprise Linux 3 Desktop
- RedHat, Enterprise Linux 4 WS
- RedHat, Enterprise Linux 4 ES
- RedHat, Enterprise Linux 4 AS
- RedHat, Enterprise Linux 4 Desktop
Remedy:
For Ubuntu Linux:
Upgrade to the latest perl package (5.8.4-2ubuntu0.3 or later), as listed in USN-72-1 February 02, 2005. See References.
For Red Hat Linux:
Refer to RHSA-2005:103-04 or RHSA-2005:105-11 for patch, upgrade, or suggested workaround information. See References.
For Gentoo Linux:
Refer to Gentoo Linux Security Announcement GLSA 2005-02-13 for patch, upgrade, or suggested workaround information. See References.
Consequences:
Gain Access
References:
- CIAC Information Bulletin P-122, Updated Perl Packages Fix Security Issues at http://www.ciac.org/ciac/bulletins/p-122.shtml.
- BID-12426: Perl SuidPerl Multiple Local Vulnerabilities
- CVE-2005-0156: Buffer overflow in the PerlIO implementation in Perl 5.8.0, when installed with setuid support (sperl), allows local users to execute arbitrary code by setting the PERLIO_DEBUG variable and executing a Perl script whose full pathname contains a long directory tree.
- GLSA-200502-13: Perl: Vulnerabilities in perl-suid wrapper
- MDKSA-2005:031: Updated perl packages fix multiple vulnerabilities
- RHSA-2005-103: perl security update
- RHSA-2005-105: perl security update
- SA14120: Perl "PERLIO_DEBUG" Privilege Escalation Vulnerabilities
- USN-72-1: Perl vulnerabilities
Reported:
Feb 02, 2005
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