CVE-2020-11868: debian debian_linux Origin Validation Error
CVSS: 7.5v3.1HighModified
AliasesMGASA-2020-0212UBUNTU-CVE-2020-11868DEBIAN-CVE-2020-11868DLA-2201-1
Published 17-04-2020Last modified 05-05-2025
Vulnerability summary
CVE-2020-11868 is a high (CVSS 7.5) Origin Validation Error vulnerability in debian debian_linux. EPSS estimates a 2.12% chance of exploitation in the next 30 days, higher than 81.5% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (CVE.org)EPSS score
2.12%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 7 · Related 6Timeline
- 17-04-2020PublishedVulnerability first disclosed.
- 05-05-2025Last modifiedVulnerability information updated.
Description
ntpd in ntp before 4.2.8p14 and 4.3.x before 4.3.100 allows an off-path attacker to block unauthenticated synchronization via a server mode packet with a spoofed source IP address, because transmissions are rescheduled even when a packet lacks a valid origin timestamp.
CVSS metrics
8 scores · 4 sources · 3 versionsHigh 7.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Medium 5.9Preferred score · CVE.org (CNA)
CVSS:3.0/AC:H/AV:N/A:H/C:N/I:N/PR:N/S:U/UI:NSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated5.9MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST5.9MediumCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Medium 5.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
2.12%
Chance of exploitation in the next 30 days
Percentile
82%
Versus all other CVEs
30-day change
0.00 pp
From 2.12% on 19-09-2026
19-09-202619-10-2026
EPSS score2.12%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Netapp13 products
- all_flash_fabric-attached_storage_8300na
- all_flash_fabric-attached_storage_8700na
- all_flash_fabric-attached_storage_a400na
- clustered_data_ontapna
- data_ontapna
Debian2 products
- ntp< 1:4.2.8p14+dfsg-1 | < 1:4.2.6.p5+dfsg-7+deb8u3
- debian_linuxEOL8.0
Mageia1 product
- ntp< 4.2.8p14-1.mga7
Ntp1 product
- ntp≤ 4.2.7 | ≥ 4.3.98, < 4.3.100 | 4.2.8 | 4.2.8:p1 | 4.2.8:p1-beta1 | 4.2.8:p1-beta2 | 4.2.8:p1-beta3 | 4.2.8:p1-beta4 | 4.2.8:p1-beta5 | 4.2.8:p1-rc1 | 4.2.8:p1-rc2 | 4.2.8:p10 | 4.2.8:p11 | 4.2.8:p12 | 4.2.8:p13 | 4.2.8:p2 | 4.2.8:p2-rc1 | 4.2.8:p2-rc2 | 4.2.8:p2-rc3 | 4.2.8:p3 | 4.2.8:p3-rc1 | 4.2.8:p3-rc2 | 4.2.8:p3-rc3 | 4.2.8:p4 | 4.2.8:p5 | 4.2.8:p6 | 4.2.8:p7 | 4.2.8:p8 | 4.2.8:p9
Opensuse1 product
- leapEOL15.1 | 15.2
Redhat1 product
- enterprise_linuxEOL7.0
Ubuntu1 product
- ntpAll versions (No fix recorded)
7 vendors · 20 products
References
17 links
lists.debian.org/debian-lts-announce/2020/05/msg00004.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.opensuse.org/opensuse-security-announce/2020-07/msg00005.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00044.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
Show all 17 references
- bugs.ntp.org/3592REPORT