Bug 1459152 (CVE-2017-1000368)
| Summary: | CVE-2017-1000368 sudo: Privilege escalation via improper get_process_ttyname() parsing (insufficient fix for CVE-2017-1000367) | ||
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| Product: | [Other] Security Response | Reporter: | Andrej Nemec <anemec> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | dkopecek, jvymazal, kent, kseifried, kzak, mattdm, pkis, rsroka, sardella, slawomir, tosykora |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | sudo 1.8.20p2 | Doc Type: | If docs needed, set a value |
| Doc Text: |
It was found that the original fix for CVE-2017-1000367 was incomplete. A flaw was found in the way sudo parsed tty information from the process status file in the proc filesystem. A local user with privileges to execute commands via sudo could use this flaw to escalate their privileges to root.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2017-06-27 06:46:59 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: | 1459407, 1459408, 1459409, 1459410, 1459411 | ||
| Bug Blocks: | 1458426 | ||
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Description
Andrej Nemec
2017-06-06 12:26:45 UTC
External References: https://www.sudo.ws/alerts/linux_tty.html https://access.redhat.com/security/vulnerabilities/3059071 https://access.redhat.com/security/cve/CVE-2017-1000367 *** Bug 1458425 has been marked as a duplicate of this bug. *** Upstream patch seems to be: https://www.sudo.ws/repos/sudo/rev/15a46f4007dd Notes about exploitation: This flaw can lead to executing commands as root, when a root terminal is open on the same machine. Since you actually need a root terminal to be open on the machine the exploit is being run, this is not a straight forward privilege escalation flaw. Therefore this is rated as having Moderate impact. This issue has been addressed in the following products: Red Hat Enterprise Linux 5 Extended Lifecycle Support Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 7 Via RHSA-2017:1574 https://access.redhat.com/errata/RHSA-2017:1574 |