How severe is CVE-2013-2494?

CVE-2013-2494 has a CVSS 2.0 base score of 4.9, rated medium severity.

Is CVE-2013-2494 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-2494?

CVE-2013-2494 primarily affects Isc Dhcp. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-2494?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2013-2494 published?

CVE-2013-2494 was published on 2013-03-28 and last updated on 2026-06-16.

CVE-2013-2494

CVE-2013-2494 is a medium-severity vulnerability in Isc Dhcp with a CVSS 2.0 base score of 4.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: Medium (CVSS 2.0 base score 4.9)
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Isc Dhcp
Published: 2013-03-28
Last modified: 2026-06-16

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.

Frequently asked questions

What is CVE-2013-2494?: 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.
How severe is CVE-2013-2494?: CVE-2013-2494 has a CVSS 2.0 base score of 4.9, rated medium severity.
Is CVE-2013-2494 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-2494?: CVE-2013-2494 primarily affects Isc Dhcp. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-2494?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-2494 published?: CVE-2013-2494 was published on 2013-03-28 and last updated on 2026-06-16.

References

https://kb.isc.org/article/AA-00880/

Affected products (19)

cpe:2.3:a:isc:dhcp:4.2.0:*:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.2.0:a1:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.2.0:a2:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.2.0:b1:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.2.0:b2:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.2.0:p1:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.2.0:rc1:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.2.1:*:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.2.1:b1:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.2.1:rc1:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.2.2:*:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.2.2:b1:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.2.2:rc1:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.2.3:*:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.2.3:p1:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.2.3:p2:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.2.4:*:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.2.4:p1:*:*:*:*:*:*
cpe:2.3:a:isc:dhcp:4.2.5:*:*:*:*:*:*:*

More vulnerabilities in Isc Dhcp

CVE-2009-0692 — Critical (CVSS 10.0): Stack-based buffer overflow in the script_write_params method in client/dhclient.c in ISC DHCP dhclient 4.1 before…
CVE-2011-2749 — High (CVSS 7.8): The server in ISC DHCP 3.x and 4.x before 4.2.2, 3.1-ESV before 3.1-ESV-R3, and 4.1-ESV before 4.1-ESV-R3 allows remote…
CVE-2011-2748 — High (CVSS 7.8): The server in ISC DHCP 3.x and 4.x before 4.2.2, 3.1-ESV before 3.1-ESV-R3, and 4.1-ESV before 4.1-ESV-R3 allows remote…
CVE-2011-0413 — High (CVSS 7.8): The DHCPv6 server in ISC DHCP 4.0.x and 4.1.x before 4.1.2-P1, 4.0-ESV and 4.1-ESV before 4.1-ESV-R1, and 4.2.x before…
CVE-2018-5732 — High (CVSS 7.5): Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity…
CVE-2018-5733 — High (CVSS 7.5): A malicious client which is allowed to send very large amounts of traffic (billions of packets) to a DHCP server can…

All CVEs affecting Isc Dhcp →

Other CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities

CVE-2026-2778 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. This vulnerability was fixed in…
CVE-2026-2776 — Critical (CVSS 10.0): Sandbox escape due to incorrect boundary conditions in the Telemetry component in External Software. This vulnerability…
CVE-2025-1866 — Critical (CVSS 10.0): Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in warmcat libwebsockets allows…
CVE-2022-27625 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2022-27624 — Critical (CVSS 10.0): A vulnerability regarding improper restriction of operations within the bounds of a memory buffer is found in the…
CVE-2020-11896 — Critical (CVSS 10.0): The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.

Browse all CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) vulnerabilities →