Bug 1716665 (CVE-2020-11868)
| Summary: | CVE-2020-11868 ntp: DoS on client ntpd using server mode packet | ||
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| Product: | [Other] Security Response | Reporter: | Laura Pardo <lpardo> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED ERRATA | QA Contact: | |
| Severity: | low | Docs Contact: | |
| Priority: | low | ||
| Version: | unspecified | CC: | dwoodruf, gwync, linville, mlichvar, sachinc, security-response-team, yozone |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | ntp 4.2.8p14, ntp 4.3.100 | Doc Type: | If docs needed, set a value |
| Doc Text: |
A flaw was found in the Network Time Protocol (NTP), where a security issue exists that allows an off-path attacker to prevent the Network Time Protocol daemon (ntpd) from synchronizing with NTP servers not using authentication. A server mode packet with a spoofed source address sent to the client ntpd causes the next transmission to be rescheduled, even if the packet does not have a valid origin timestamp. If the packet is sent to the client frequently enough, it stops polling the server and is unable to synchronize with it.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2020-06-23 17:20:23 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: | 1824831, 1824832, 1842427 | ||
| Bug Blocks: | 1716668 | ||
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Description
Laura Pardo
2019-06-03 21:18:25 UTC
*** Bug 1716661 has been marked as a duplicate of this bug. *** External References: http://support.ntp.org/bin/view/Main/NtpBug3592 Mitigation: Use authentication with symmetric keys. Created ntp tracking bugs for this issue: Affects: fedora-all [bug 1824831] Could you please let me know the tentative resolution date of this bug? This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2020:2663 https://access.redhat.com/errata/RHSA-2020:2663 This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2020-11868 |