Date: Wed, 9 Aug 2000 17:39:10 -0700 (PDT)
From: Joe Little
To: tl-security-announce@turbolinux.com
Subject: [TL-Security-Announce] perl TLSA2000018-1
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TurboLinux Security Announcement
Package: perl-5.00503 and earlier
Date: Wednesday August 9 17:00 PDT 2000
Affected TurboLinux versions: 6.0.5 and earlier (including 4.x)
Vulnerability Type: Local root exploit
TurboLinux Advisory ID#: TLSA2000018-1
Credits: Michal Zalewski, Simon Cozens
A security hole was discovered in the package mentioned above.
Please update the package in your installation as soon as possible
or disable the service.
1. Problem Summary
A component of perl, sperl, runs suid root to enable execution
of perl code by a file’s owner. When sperl is used in an improper
manner, it will alert the root user via /bin/mail that illegal use
of sperl has been attempted. A widely available exploit utilizes
this behavior to gain privileged access.
2. Impact
The latest versions of perl as well as past shipping versions of
perl in TurboLinux distributions are susceptible to a local root
exploit.
3. Solution
Please upgrade your packages to match the new revision
Update the packages from our ftp server by running the following
command:
rpm -Fv ftp_path_to_filename
Where ftp_path_to_filename is the following for 4.x or 6.x
versions:
ftp://ftp.turbolinux.com/pub/updates/4.0/security/perl-5.00503-7.i386.rpm
ftp://ftp.turbolinux.com/pub/updates/6.0/security/perl-5.005_02-8TL.i386.rpm
The source RPM can be downloaded here:
ftp://ftp.turbolinux.com/pub/updates/4.0/SRPMS/perl-5.005_02-8TL.src.rpm
ftp://ftp.turbolinux.com/pub/updates/6.0/SRPMS/perl-5.00503-7.src.rpm
**Note: You must rebuild and install the RPM if you choose to
download and install the SRPM. Simply installing the SRPM alone
WILL NOT CLOSE THE SECURITY HOLE.
Please verify the MD5 checksum of the update before you
install:
MD5 sum Package Name
dd1d17422817d40be46d730f1ce8d41e perl-5.00503-7.i386.rpm
659d162acaedb37c364b45e8666dbd2b perl-5.00503-7.src.rpm
2951099587eabb3de107ee147619a34b perl-5.005_02-8TL.i386.rpm
13a590ae17f2c445c5240d395c0bec5a perl-5.005_02-8TL.src.rpm
These packages are GPG signed by Turbolinux for security. Our
key is available here:
http://www.turbolinux.com/security/tlgpgkey.asc
To verify a package, use the following command:
rpm –checksig name_of_rpm
To examine only the md5sum, use the following command:
rpm –checksig –nogpg name_of_rpm
**Note: Checking GPG keys requires RPM 3.0 or higher.
You can find more updates on our ftp server:
ftp://ftp.turbolinux.com/pub/updates/6.0/security/
for TL6.0 Workstation and Server security updates
ftp://ftp.turbolinux.com/pub/updates/4.0/security/
for TL4.0 Workstation and Server security updates
Our webpage for security announcements:
http://www.turbolinux.com/security
If you want to report vulnerabilities, please contact:
rt-security@turbolinux.com
Subscribe to the TurboLinux Security Mailing lists:
TL-security – A moderated list for discussing security issues in
TurboLinux products.
Subscribe at http://www.turbolinux.com/mailman/listinfo/tl-security
TL-security-announce – An announce-only mailing list for
security updates and alerts.
Subscribe at
http://www.turbolinux.com/mailman/listinfo/tl-security-announce
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