Bug 1271070 (CVE-2015-7704)
Summary: | CVE-2015-7704 ntp: disabling synchronization via crafted KoD packet | ||||||
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Product: | [Other] Security Response | Reporter: | Martin Prpič <mprpic> | ||||
Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> | ||||
Status: | CLOSED ERRATA | QA Contact: | |||||
Severity: | high | Docs Contact: | |||||
Priority: | high | ||||||
Version: | unspecified | CC: | bpowers, dconsoli, jaeshin, mlichvar, moshiro, osoukup, sardella, security-response-team, yhuang, yozone | ||||
Target Milestone: | --- | Keywords: | Security | ||||
Target Release: | --- | ||||||
Hardware: | All | ||||||
OS: | Linux | ||||||
Whiteboard: | |||||||
Fixed In Version: | ntp 4.2.8p4 | Doc Type: | Bug Fix | ||||
Doc Text: |
It was discovered that ntpd as a client did not correctly check timestamps in Kiss-of-Death packets. A remote attacker could use this flaw to send a crafted Kiss-of-Death packet to an ntpd client that would increase the client's polling interval value, and effectively disable synchronization with the server.
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Story Points: | --- | ||||
Clone Of: | Environment: | ||||||
Last Closed: | 2015-11-26 14:27:34 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: | 1272152, 1272153, 1272154, 1272155, 1274165, 1283095, 1283096, 1283536 | ||||||
Bug Blocks: | 1260670 | ||||||
Attachments: |
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Description
Martin Prpič
2015-10-13 06:28:38 UTC
Created attachment 1082270 [details] CVE-2015-7704 patch Statement: This issue did not affect the versions of ntp as shipped with Red Hat Enterprise Linux 5 and Red Hat Enterprise Linux 6.4, as they do not include support for KoD packets. External References: https://www.cs.bu.edu/~goldbe/NTPattack.html Created ntp tracking bugs for this issue: Affects: fedora-all [bug 1274165] The upstream patch for this issue (included in upstream version 4.2.8p4) is incomplete, as described in: https://lists.ntp.org/pipermail/pool/2015-October/007631.html This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Red Hat Enterprise Linux 6 Via RHSA-2015:1930 https://rhn.redhat.com/errata/RHSA-2015-1930.html ntp-4.2.6p5-34.fc23 has been pushed to the Fedora 23 stable repository. If problems still persist, please make note of it in this bug report. ntp-4.2.6p5-34.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report. This issue has been addressed in the following products: Red Hat Enterprise Linux 6.5 EUS - Server and Compute Node Only Red Hat Enterprise Linux 6.6 EUS - Server and Compute Node Only Via RHSA-2015:2520 https://rhn.redhat.com/errata/RHSA-2015-2520.html ntp-4.2.6p5-36.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report. |