dhcp: bind/libdns CVE-2013-2266 regular expressions excessive resource consumption DoS
Published Mar 28, 2013
4.9
MEDIUMCVSS 2.0
EPSS 1.17%
Description
libdns in ISC DHCP 4.2.x before 4.2.5-P1 allows remote name servers to cause a denial of service (memory consumption) via vectors involving a regular expression, as demonstrated by a memory-exhaustion attack against a machine running a dhcpd process, a related issue to CVE-2013-2266.
Affected products
No data.
- 4.2.0
- 4.2.0
- 4.2.0
- 4.2.0
- 4.2.0
- 4.2.0
- 4.2.0
- 4.2.1
- 4.2.1
- 4.2.1
- 4.2.2
- 4.2.2
- 4.2.2
- 4.2.3
- 4.2.3
- 4.2.3
- 4.2.4
- 4.2.4
- 4.2.5
No data.
Red Hat Enterprise Linux 4
dhcp
Not affected
Red Hat Enterprise Linux 5
dhcp
Not affected
Red Hat Enterprise Linux 6
dhcp
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | dhcp | Not affected | n/a |
| Red Hat Enterprise Linux 5 | dhcp | Not affected | n/a |
| Red Hat Enterprise Linux 6 | dhcp | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Not Vulnerable. This issue does not affect the version of dhcp as shipped with Red Hat Enterprise Linux 5 and 6.
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:H/Au:S/C:N/I:N/A:C
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 (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.17% (0.01166) | 66.14th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.17% (0.01166) | 63.09th | v5 (v2026.06.15) |
| Mar 30, 2025 | 1.04% (0.01036) | 75.38th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.99% (0.02992) | 77.55th | v4 (v2025.03.14) |
| Mar 17, 2025 | 1.04% (0.01036) | 75.85th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.08% (0.00080) | 36.28th | v3 (v2023.03.01) |
| Apr 25, 2024 | 0.08% (0.00081) | 33.85th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.07% (0.00072) | 29.28th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.08% (0.00080) | 32.69th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.89% (0.00885) | 26.24th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
References (5)
- https://access.redhat.com/security/cve/CVE-2013-2494 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=928011 Issue Tracking
- https://kb.isc.org/article/AA-00880/ x_refsource_CONFIRMVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2013-2494
- https://www.cve.org/CVERecord?id=CVE-2013-2494
| Link | Providers | Tags |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2013-2494 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=928011 | Issue Tracking | |
| https://kb.isc.org/article/AA-00880/ | x_refsource_CONFIRMVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2013-2494 | ||
| https://www.cve.org/CVERecord?id=CVE-2013-2494 |
Change history (0)
No recorded changes yet.