CVE-2013-1243

What it is

The IP stack in Cisco Intrusion Prevention System (IPS) Software in ASA 5500-X IPS-SSP software and hardware modules before 7.1(5)E4, IPS 4500 sensors before 7.1(6)E4, and IPS 4300 sensors before 7.1(5)E4 allows remote attackers to cause a denial of service (MainApp process hang) via malformed IPv4 packets, aka Bug ID CSCtx18596.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of service disruption.

Exploit odds

1.3% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2013-07-18 12:48 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 23:51 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 1.3% in the next 30 days (EPSS).
• Severity: 7.8 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2013-07-18 12:48 UTC

Last modified

2026-06-16 23:51 UTC

Exploit probability

1.3% · EPSS, next 30 days

Weakness

CWE-119 · Buffer errors

Record status

Modified

Affected

• Cisco Asa 5500-x Series Ips Ssp Software 7.1
• Cisco Intrusion Prevention System ≤ 7.1
• Cisco Asa 5585-x
• Cisco idsm-2
• Cisco Ips 4345 Sensor
• Cisco Ips 4360 Sensor
• Cisco Ips 4510 Sensor
• Cisco Ips 4520 Sensor

Attack profile CVSS 2.0 · 7.8

Attack vector

Network

Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2013-1243.md and follow it. Check whether this project is affected by CVE-2013-1243. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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