Bug 1731412 (CVE-2019-13917)
| Summary: | CVE-2019-13917 exim: ${sort} in configuration leads to privilege escalation | ||
|---|---|---|---|
| Product: | [Other] Security Response | Reporter: | Dhananjay Arunesh <darunesh> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED NOTABUG | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | CC: | bennie.joubert, dwmw2, jskarvad, security-response-team, tremble |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | exim 4.92.1 | Doc Type: | If docs needed, set a value |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2019-07-22 05:16:24 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: | 1733410, 1733411 | ||
| Bug Blocks: | 1731414 | ||
Acknowledgments: Name: Jeremy Harris Statement: As per upstream, this exim security flaw only affects exim versions from 4.85 up to and including 4.92. Since Red Hat Enterprise Linux 5 ships exim-4.63, it is not affected by this flaw. Mitigation:
Do not use ${sort } in your exim configuration.
External References: https://www.exim.org/static/doc/security/CVE-2019-13917.txt Created exim tracking bugs for this issue: Affects: epel-all [bug 1733411] Affects: fedora-all [bug 1733410] |
A flaw was found in exim, in which if the server configuration uses the ${sort } expansion, then this could be controlled by the remote attacker (e.g. $local_part, $domain), resulting in the attacker able to execute programs with root privileges. Note: The default config, as shipped by exim upstream, does not contain ${sort }. exim versions from 4.85 up to and including 4.92 are affected.