Multiple vulnerabilities in Cisco IOS and IOS XE Software

Published: 2024-03-28

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2024-20307 CVE-2024-20308
CWE-ID	CWE-122 CWE-124
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	Cisco IOS Operating systems & Components / Operating system Cisco IOS XE Operating systems & Components / Operating system
Vendor	Cisco Systems, Inc

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Heap-based buffer overflow

EUVDB-ID: #VU87896

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-2024-20307

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary error in the IKEv1 fragmentation code. A remote attacker can pass specially crafted data to the application, trigger a heap-based buffer overflow and cause a denial of service condition on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco IOS: 17.9.3 - 17.12.1

Cisco IOS XE: 17.9.3 - 17.12.1

External links

http://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ikev1-NO2ccFWz

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.

2) Buffer Underwrite ('Buffer Underflow')

EUVDB-ID: #VU87897

Risk: High

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-20308

CWE-ID: CWE-124 - Buffer Underwrite ('Buffer Underflow')