chrony: Two security flaws fixed in chrony-1.29 release
Published Nov 5, 2013
5.0
MEDIUMCVSS 2.0
EPSS 3.24%
Description
Multiple integer overflows in pktlength.c in Chrony before 1.29 allow remote attackers to cause a denial of service (crash) via a crafted (1) REQ_SUBNETS_ACCESSED or (2) REQ_CLIENT_ACCESSES command request to the PKL_CommandLength function or crafted (3) RPY_SUBNETS_ACCESSED, (4) RPY_CLIENT_ACCESSES, (5) RPY_CLIENT_ACCESSES_BY_INDEX, or (6) RPY_MANUAL_LIST command reply to the PKL_ReplyLength function, which triggers an out-of-bounds read or buffer overflow. NOTE: versions 1.27 and 1.28 do not require authentication to exploit.
Affected products
No data.
- ≤ 1.28
- 1.0
- 1.1
- 1.18
- 1.19
- 1.19.99.1
- 1.19.99.2
- 1.19.99.3
- 1.20
- 1.21
- 1.21
- 1.23
- 1.23
- 1.23.1
- 1.24
- 1.24
- 1.25
- 1.25
- 1.25
- 1.26
- 1.26
- 1.27
- 1.27
- 1.28
No data.
Red Hat Enterprise Linux 7
chrony
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | chrony | Not affected | n/a |
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 | 3.24% (0.03244) | 87.87th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.27% (0.03271) | 86.76th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.95% (0.00946) | 74.24th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.65% (0.02652) | 76.22th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.95% (0.00946) | 74.72th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.31% (0.01315) | 86.51th | v3 (v2023.03.01) |
| May 24, 2024 | 0.67% (0.00666) | 79.65th | v3 (v2023.03.01) |
| May 10, 2024 | 0.56% (0.00560) | 77.53th | v3 (v2023.03.01) |
| Apr 25, 2024 | 0.47% (0.00474) | 75.39th | v3 (v2023.03.01) |
| Mar 15, 2024 | 0.49% (0.00486) | 75.45th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.41% (0.00408) | 73.15th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.31% (0.01312) | 83.82th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.21% (0.01213) | 66.61th | v2 (v2022.01.01) |
| Feb 17, 2023 | 1.21% (0.01213) | 66.22th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.21% (0.01213) | 64.21th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.21% (0.01213) | 40.54th | v2 (v2022.01.01) |
References (8)
- http://git.tuxfamily.org/chrony/chrony.git/?p=chrony/chrony.git%3Ba=commitdiff%3Bh=7712455d9aa33d0db0945effaa07e900b85987b1 x_refsource_CONFIRM
- http://permalink.gmane.org/gmane.comp.time.chrony.announce/15 mailing-listx_refsource_MLISTPatchVendor Advisory
- http://seclists.org/oss-sec/2013/q3/332 mailing-listx_refsource_MLISTPatch
- http://www.debian.org/security/2013/dsa-2760 vendor-advisoryx_refsource_DEBIAN
- https://access.redhat.com/security/cve/CVE-2012-4502 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=846392 x_refsource_CONFIRMPatchIssue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2012-4502
- https://www.cve.org/CVERecord?id=CVE-2012-4502
| Link | Providers | Tags |
|---|---|---|
| http://git.tuxfamily.org/chrony/chrony.git/?p=chrony/chrony.git%3Ba=commitdiff%3Bh=7712455d9aa33d0db0945effaa07e900b85987b1 | x_refsource_CONFIRM | |
| http://permalink.gmane.org/gmane.comp.time.chrony.announce/15 | mailing-listx_refsource_MLISTPatchVendor Advisory | |
| http://seclists.org/oss-sec/2013/q3/332 | mailing-listx_refsource_MLISTPatch | |
| http://www.debian.org/security/2013/dsa-2760 | vendor-advisoryx_refsource_DEBIAN | |
| https://access.redhat.com/security/cve/CVE-2012-4502 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=846392 | x_refsource_CONFIRMPatchIssue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2012-4502 | ||
| https://www.cve.org/CVERecord?id=CVE-2012-4502 |
Change history (0)
No recorded changes yet.