The client logging functionality in chronyd in Chrony before 1.23.1 does not restrict the amount of memory used for storage of client information, which allows remote attackers to cause a denial of service (memory consumption) via spoofed (1) NTP or (2) cmdmon packets
Published Feb 8, 2010
5.0
MEDIUMCVSS 2.0
EPSS 2.67%
Description
The client logging functionality in chronyd in Chrony before 1.23.1 does not restrict the amount of memory used for storage of client information, which allows remote attackers to cause a denial of service (memory consumption) via spoofed (1) NTP or (2) cmdmon packets.
Affected products
No data.
- ≤ 1.23-pre1
- 1.18
- 1.19
- 1.19-1
- 1.19.99.1
- 1.19.99.2
- 1.19.99.3
- 1.20
- 1.21
- 1.21-pre1
- 1.24-pre1
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (16 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.67% (0.02674) | 85.26th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.70% (0.02696) | 83.92th | v5 (v2026.06.15) |
| Mar 17, 2025 | 1.38% (0.01382) | 79.00th | v4 (v2025.03.14) |
| Dec 17, 2024 | 3.16% (0.03158) | 90.91th | v3 (v2023.03.01) |
| Sep 17, 2024 | 4.41% (0.04407) | 92.56th | v3 (v2023.03.01) |
| May 24, 2024 | 1.82% (0.01820) | 88.19th | v3 (v2023.03.01) |
| May 10, 2024 | 1.54% (0.01535) | 87.00th | v3 (v2023.03.01) |
| Apr 25, 2024 | 1.30% (0.01302) | 85.68th | v3 (v2023.03.01) |
| Mar 15, 2024 | 1.25% (0.01249) | 85.20th | v3 (v2023.03.01) |
| Feb 8, 2024 | 1.05% (0.01052) | 83.57th | v3 (v2023.03.01) |
| Nov 8, 2023 | 4.41% (0.04407) | 91.43th | v3 (v2023.03.01) |
| Mar 7, 2023 | 3.26% (0.03257) | 89.73th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.32% (0.01319) | 71.27th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.32% (0.01319) | 71.23th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.32% (0.01319) | 69.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.32% (0.01319) | 44.98th | v2 (v2022.01.01) |
References (7)
- http://chrony.tuxfamily.org/News.html x_refsource_CONFIRMVendor Advisory
- http://git.tuxfamily.org/chrony/chrony.git/?p=gitroot/chrony/chrony.git%3Ba=commit%3Bh=2f63cf448560fdb96b80d8488aae6a15b802a753 x_refsource_CONFIRM
- http://secunia.com/advisories/38428 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/38480 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://www.debian.org/security/2010/dsa-1992 vendor-advisoryx_refsource_DEBIAN
- http://www.securityfocus.com/bid/38106 vdb-entryx_refsource_BID
- https://bugzilla.redhat.com/show_bug.cgi?id=555367 x_refsource_CONFIRM
| Link | Providers | Tags |
|---|---|---|
| http://chrony.tuxfamily.org/News.html | x_refsource_CONFIRMVendor Advisory | |
| http://git.tuxfamily.org/chrony/chrony.git/?p=gitroot/chrony/chrony.git%3Ba=commit%3Bh=2f63cf448560fdb96b80d8488aae6a15b802a753 | x_refsource_CONFIRM | |
| http://secunia.com/advisories/38428 | third-party-advisoryx_refsource_SECUNIAVendor Advisory | |
| http://secunia.com/advisories/38480 | third-party-advisoryx_refsource_SECUNIAVendor Advisory | |
| http://www.debian.org/security/2010/dsa-1992 | vendor-advisoryx_refsource_DEBIAN | |
| http://www.securityfocus.com/bid/38106 | vdb-entryx_refsource_BID | |
| https://bugzilla.redhat.com/show_bug.cgi?id=555367 | x_refsource_CONFIRM |
Change history (0)
No recorded changes yet.