#VU57799 Memory leak in Cisco Systems, Inc Other software


Published: 2021-10-29

Vulnerability identifier: #VU57799

Vulnerability risk: Medium

CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-40114

CWE-ID: CWE-401

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Snort
Server applications / IDS/IPS systems, Firewalls and proxy servers
Cisco Firepower Threat Defense (FTD)
Hardware solutions / Security hardware applicances
Cisco UTD Snort IPS Engine Software for IOS XE
Other software / Other software solutions
Cisco UTD Engine for IOS XE SD-WAN
Other software / Other software solutions

Vendor: Sourcefire
Cisco Systems, Inc

Description
The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak while the Snort detection engine is processing ICMP packets. A remote attacker can send a specially crafted ICMP packet, force the application to leak memory and perform denial of service attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Snort: 2.1.0 - 2.9.17.1

Cisco Firepower Threat Defense (FTD): 6.2.2, 6.2.3, 6.3.0, 6.4.0, 6.5.0, 6.6.0, 6.7.0

Cisco UTD Snort IPS Engine Software for IOS XE: 16.12 - 17.4

Cisco UTD Engine for IOS XE SD-WAN: 16.12 - 17.4


External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-dos-s2R7W9UU


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.


Latest bulletins with this vulnerability