Bug 1104455 (CVE-2014-0476)
| Summary: | CVE-2014-0476 chkrootkit: local privilege escalation | ||
|---|---|---|---|
| Product: | [Other] Security Response | Reporter: | Murray McAllister <mmcallis> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | CC: | gwync, jrusnack, manuel.wolfshant, upendra.gandhi, vdanen |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2014-06-13 05:40:02 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: | 1104456, 1104457 | ||
| Bug Blocks: | |||
Created chkrootkit tracking bugs for this issue: Affects: fedora-all [bug 1104456] Affects: epel-all [bug 1104457] |
A quoting issue was found in chkrootkit which would lead to a file in /tmp/ being executed, if /tmp/ was mounted without the noexec option. chkrootkit is typically run as the root user. A local attacker could use this flaw to escalate their privileges. The problematic part was: file_port=$file_port $i Which is changed to file_port="$file_port $i" to fix the issue. From the Debian diff: --- chkrootkit-0.49.orig/debian/patches/CVE-2014-0476.patch +++ chkrootkit-0.49/debian/patches/CVE-2014-0476.patch @@ -0,0 +1,13 @@ +Index: chkrootkit/chkrootkit +=================================================================== +--- chkrootkit.orig/chkrootkit ++++ chkrootkit/chkrootkit +@@ -117,7 +117,7 @@ slapper (){ + fi + for i in ${SLAPPER_FILES}; do + if [ -f ${i} ]; then +- file_port=$file_port $i ++ file_port="$file_port $i" + STATUS=1 + fi + done Acknowledgements: Red Hat would like to thank Thomas Stangner for reporting this issue.