SB2012072601 - Multiple vulnerabilities in SystemTap

Description

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error (CVE-ID: CVE-2011-2502)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

runtime/staprun/staprun_funcs.c in the systemtap runtime tool (staprun) in SystemTap before 1.6 does not properly validate modules when a module path is specified by a user for user-space probing, which allows local users in the stapusr group to gain privileges via a crafted module in the search path in the -u argument.

2) Input validation error (CVE-ID: CVE-2011-2503)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

The insert_module function in runtime/staprun/staprun_funcs.c in the systemtap runtime tool (staprun) in SystemTap before 1.6 does not properly validate a module when loading it, which allows local users to gain privileges via a race condition between the signature validation and the module initialization.

Remediation

Install update from vendor's website.

References

• http://secunia.com/advisories/45377
• http://sources.redhat.com/git/gitweb.cgi?p=systemtap.git;a=blob;f=NEWS;hb=304d73b1fea24af791f2a129fb141c5009eae6a8
• http://sources.redhat.com/git/gitweb.cgi?p=systemtap.git;a=commitdiff;h=4ecaadf545a729bb3e5f01f6f019716d49815d9a
• https://bugzilla.redhat.com/show_bug.cgi?id=716476
• http://secunia.com/advisories/46920
• http://sources.redhat.com/git/gitweb.cgi?p=systemtap.git;a=commitdiff;h=ed51cfa24ca27746ab09b59280b94117dd58cba3
• http://www.debian.org/security/2011/dsa-2348
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-2503