CVE-2021-40114 - Missing Release of Memory after Effective Lifetime

Severity

75%

Complexity

39%

Confidentiality

60%

Multiple Cisco products are affected by a vulnerability in the way the Snort detection engine processes ICMP traffic that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper memory resource management while the Snort detection engine is processing ICMP packets. An attacker could exploit this vulnerability by sending a series of ICMP packets through an affected device. A successful exploit could allow the attacker to exhaust resources on the affected device, causing the device to reload.

CVSS 3.1 Base Score 7.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

CVSS 2.0 Base Score 7.8. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:C).

Demo Examples

Missing Release of Memory after Effective Lifetime

CWE-401

The following C function leaks a block of allocated memory if the call to read() does not return the expected number of bytes:


               
}
return buf;
return NULL;
return NULL;

Overview

First reported 3 years ago

2021-10-27 19:15:00

Last updated 3 years ago

2021-10-29 13:15:00

Affected Software

Cisco Firepower Management Center 2.9.14.0

2.9.14.0

Cisco Firepower Management Center 2.9.15

2.9.15

Cisco Firepower Management Center 2.9.16

2.9.16

Cisco Firepower Threat Defense (FTD)

Snort Snort

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