CVE-2013-1147

Name: CVE-2013-1147
Creator: NVD / NIST
Published: 2013-03-28T23:55:01.627+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.33%

Last modified Jun 16, 2026

CVE-2013-1147 is a vulnerability of currently unknown severity. The Protocol Translation (PT) functionality in Cisco IOS 12.3 through 12.4 and 15.0 through 15.3, when one-step port-23 translation or a Telnet-to-PAD ruleset is configured, does not properly validate TCP connection information, which allows remote attackers to cause a denial of service (device reload) via an attempted connection to a PT resource, aka Bug ID CSCtz35999.. EPSS estimates a 1.33% chance of exploitation in the next 30 days.

Description

The Protocol Translation (PT) functionality in Cisco IOS 12.3 through 12.4 and 15.0 through 15.3, when one-step port-23 translation or a Telnet-to-PAD ruleset is configured, does not properly validate TCP connection information, which allows remote attackers to cause a denial of service (device reload) via an attempted connection to a PT resource, aka Bug ID CSCtz35999.

Metrics

EPSS Probability

1.33%

67.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Cisco	Ios	12.3
Cisco	Ios	12.4
Cisco	Ios	15.0
Cisco	Ios	15.1
Cisco	Ios	15.2
Cisco	Ios	15.3

References

Timeline

Published: Mar 28, 2013
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2013-1147?

How severe is CVE-2013-1147?

Severity scoring for CVE-2013-1147 is pending analysis. The EPSS model estimates a 1.33% probability of exploitation in the next 30 days.

How do I fix CVE-2013-1147?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2013-1147?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST