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Bug 717798 (CVE-2020-11868, CVE-2020-13817) - <net-misc/ntp-4.2.8_p14: Multiple vulnerabilities (CVE-2020-{11868,13817})
Summary: <net-misc/ntp-4.2.8_p14: Multiple vulnerabilities (CVE-2020-{11868,13817})
Alias: CVE-2020-11868, CVE-2020-13817
Product: Gentoo Security
Classification: Unclassified
Component: Vulnerabilities (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Security
Whiteboard: A3 [glsa+ cve]
Depends on:
Reported: 2020-04-17 05:10 UTC by Sam James
Modified: 2020-07-26 23:45 UTC (History)
1 user (show)

See Also:
Package list:
Runtime testing required: ---
nattka: sanity-check+


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Description Sam James archtester Gentoo Infrastructure gentoo-dev Security 2020-04-17 05:10:43 UTC
1) CVE-2020-11868 / NTP Bug 3592

"The fix for introduced a bug whereby a system that is running ntp-4.2.8p12 or p13 that only has one unauthenticated time source can be attacked in a way that causes the victim's next poll to its source to be delayed, for as long as the attack is maintained."


2) NTP Bug 3596

"A high-performance ntpd instance that gets its time from unauthenticated IPv4 time sources may be vulnerable to an off-path attacker who can query time from the victim's ntpd instance. The attacker must be able to send and the victim must be able to receive and process a large number of packets with the spoofed IPv4 address of the upstream server. After 8 or more successful attacks in a row, the attacker can either modify the victim's clock by a limited amount or cause ntpd to exit. This attack is most effective in cases where an unusually short poll interval is expressly configured on the victim's ntpd."
Comment 1 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2020-04-17 05:11:15 UTC
@maintainer(s), please advise if ready for stabilisation or call yourself
Comment 2 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2020-05-02 16:39:11 UTC
acked by Polynomial-C, thanks!
Comment 3 Agostino Sarubbo gentoo-dev 2020-05-03 10:02:32 UTC
amd64 stable
Comment 4 Agostino Sarubbo gentoo-dev 2020-05-03 10:13:10 UTC
arm stable
Comment 5 Agostino Sarubbo gentoo-dev 2020-05-03 10:22:41 UTC
s390 stable
Comment 6 Agostino Sarubbo gentoo-dev 2020-05-03 10:25:48 UTC
sparc stable
Comment 7 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2020-05-04 06:22:39 UTC
arm64 stable
Comment 8 Rolf Eike Beer archtester 2020-05-07 19:49:07 UTC
hppa stable
Comment 9 Agostino Sarubbo gentoo-dev 2020-05-11 16:50:43 UTC
x86 stable
Comment 10 Agostino Sarubbo gentoo-dev 2020-05-13 17:12:56 UTC
ppc stable
Comment 11 Agostino Sarubbo gentoo-dev 2020-05-13 17:14:51 UTC
ppc64 stable.

Maintainer(s), please cleanup.
Security, please add it to the existing request, or file a new one.
Comment 12 Sam James archtester Gentoo Infrastructure gentoo-dev Security 2020-06-20 02:14:07 UTC
Comment 13 Larry the Git Cow gentoo-dev 2020-06-23 16:16:38 UTC
The bug has been referenced in the following commit(s):

commit fbdf99fc6dd829214056d1333d7ec34bf8da89e7
Author:     Lars Wendler <>
AuthorDate: 2020-06-23 16:16:22 +0000
Commit:     Lars Wendler <>
CommitDate: 2020-06-23 16:16:33 +0000

    net-misc/ntp: Removed old
    Package-Manager: Portage-2.3.102, Repoman-2.3.23
    Signed-off-by: Lars Wendler <>

 net-misc/ntp/Manifest                       |   2 -
 net-misc/ntp/files/ntp-4.2.8-gc-tests.patch |  41 --------
 net-misc/ntp/ntp-4.2.8_p13-r2.ebuild        | 144 ----------------------------
 net-misc/ntp/ntp-4.2.8_p13.ebuild           | 144 ----------------------------
 4 files changed, 331 deletions(-)
Comment 14 GLSAMaker/CVETool Bot gentoo-dev 2020-07-26 23:45:01 UTC
This issue was resolved and addressed in
 GLSA 202007-12 at
by GLSA coordinator Sam James (sam_c).