Bug 1109371 (CVE-2014-4038, CVE-2014-4039)
| Summary: | CVE-2014-4038 CVE-2014-4039 ppc64-diag: multiple temporary file races | ||
|---|---|---|---|
| Product: | [Other] Security Response | Reporter: | Vincent Danen <vdanen> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | dhorak, hannsj_uhl, jcajka, jrusnack, secondary-arch-list |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: |
Multiple insecure temporary file use flaws were found in the way the ppc64-diag utility created certain temporary files. A local attacker could possibly use either of these flaws to perform a symbolic link attack and overwrite arbitrary files with the privileges of the user running ppc64-diag, or obtain sensitive information from the temporary files.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2015-07-22 15:25:45 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 1164148, 1201295 | ||
| Bug Blocks: | 1109372, 1121513, 1193283 | ||
MITRE assigned the following CVEs to these issues: Common Vulnerabilities and Exposures assigned an identifier CVE-2014-4038 to the following vulnerability: Name: CVE-2014-4038 URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4038 Assigned: 20140612 Reference: http://openwall.com/lists/oss-security/2014/06/17/1 Reference: https://bugzilla.novell.com/show_bug.cgi?id=882667 Reference: https://bugzilla.redhat.com/show_bug.cgi?id=1109371 ppc64-diag 2.6.1 allows local users to overwrite arbitrary files via a symlink attack related to (1) rtas_errd/diag_support.c and /tmp/get_dt_files, (2) scripts/ppc64_diag_mkrsrc and /tmp/diagSEsnap/snapH.tar.gz, or (3) lpd/test/lpd_ela_test.sh and /var/tmp/ras. Common Vulnerabilities and Exposures assigned an identifier CVE-2014-4039 to the following vulnerability: Name: CVE-2014-4039 URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-4039 Assigned: 20140612 Reference: http://openwall.com/lists/oss-security/2014/06/17/1 Reference: https://bugzilla.redhat.com/show_bug.cgi?id=1109371 ppc64-diag 2.6.1 uses 0775 permissions for /tmp/diagSEsnap and does not properly restrict permissions for /tmp/diagSEsnap/snapH.tar.gz, which allows local users to obtain sensitive information by reading files in this archive, as demonstrated by /var/log/messages and /etc/yaboot.conf. Statement: (none) This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2015:0383 https://rhn.redhat.com/errata/RHSA-2015-0383.html This issue has been addressed in the following products: Red Hat Enterprise Linux 6 Via RHSA-2015:1320 https://rhn.redhat.com/errata/RHSA-2015-1320.html |
As noted in the SUSE bug report [1], numerous /tmp race conditions exist in ppc64-diag, in particular: rtas_errd/diag_support.c:233: char command[]="/usr/bin/find /proc/device-tree -name status -print > /tmp/get_dt_files"; rtas_errd/diag_support.c:241: fp1 = fopen("/tmp/get_dt_files", "r"); rtas_errd/prrn_hotplug:8:TMPFILE=`mktemp -p /tmp` scripts/ppc64_diag_mkrsrc:126:mkdir "/tmp/diagSEsnap", 0775; scripts/ppc64_diag_mkrsrc:127:$general_eed_file = "/tmp/diagSEsnap/snapH.tar.gz"; In the case of rtas_errd/prrn_hotplug, mktemp is used but is assumed to have succeeded; there is no check for the return value. mktemp should probably be used properly in all of these. I don't know if the data in /tmp/diagSEsnap is sensitive or not, but if it is, the permissions on that directory should probably be tightened up. No CVE(s) have been assigned to these issues as of yet. [1] https://bugzilla.novell.com/show_bug.cgi?id=882667