CVE-2020-3496

26.08.2020, 17:15

A vulnerability in the IPv6 packet processing engine of Cisco Small Business Smart and Managed Switches could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to insufficient validation of incoming IPv6 traffic. An attacker could exploit this vulnerability by sending a crafted IPv6 packet through an affected device. A successful exploit could allow the attacker to cause the switch management CLI to stop responding, resulting in a DoS condition. This vulnerability is specific to IPv6 traffic. IPv4 traffic is not affected.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	5.3 MEDIUM	NETWORK	LOW	NONE	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
cisco	CNA	5.3 MEDIUM	NETWORK	LOW	NONE	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CVE	ADP	---				---
CISA-ADP	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: 56%

Vendor	Product	Version
cisco	sg200-50_firmware	𝑥 ≤ 2.5.5.47
cisco	sg200-50p_firmware	𝑥 ≤ 2.5.5.47
cisco	sg200-50fp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg200-26_firmware	𝑥 ≤ 2.5.5.47
cisco	sg200-26p_firmware	𝑥 ≤ 2.5.5.47
cisco	sg200-26fp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg200-18_firmware	𝑥 ≤ 2.5.5.47
cisco	sg200-10fp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg200-08_firmware	𝑥 ≤ 2.5.5.47
cisco	sg200-08p_firmware	𝑥 ≤ 2.5.5.47
cisco	sf200-24_firmware	𝑥 ≤ 2.5.5.47
cisco	sf200-24p_firmware	𝑥 ≤ 2.5.5.47
cisco	sf200-24fp_firmware	𝑥 ≤ 2.5.5.47
cisco	sf200-48_firmware	𝑥 ≤ 2.5.5.47
cisco	sf200-48p_firmware	𝑥 ≤ 2.5.5.47
cisco	sf302-08pp_firmware	𝑥 ≤ 2.5.5.47
cisco	sf302-08mpp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg300-10pp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg300-10mpp_firmware	𝑥 ≤ 2.5.5.47
cisco	sf300-24pp_firmware	𝑥 ≤ 2.5.5.47
cisco	sf300-48pp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg300-28pp_firmware	𝑥 ≤ 2.5.5.47
cisco	sf300-08_firmware	𝑥 ≤ 2.5.5.47
cisco	sf300-48p_firmware	𝑥 ≤ 2.5.5.47
cisco	sg300-10mp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg300-10p_firmware	𝑥 ≤ 2.5.5.47
cisco	sg300-10_firmware	𝑥 ≤ 2.5.5.47
cisco	sg300-28p_firmware	𝑥 ≤ 2.5.5.47
cisco	sf300-24p_firmware	𝑥 ≤ 2.5.5.47
cisco	sf302-08mp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg300-28_firmware	𝑥 ≤ 2.5.5.47
cisco	sf300-48_firmware	𝑥 ≤ 2.5.5.47
cisco	sg300-20_firmware	𝑥 ≤ 2.5.5.47
cisco	sf302-08p_firmware	𝑥 ≤ 2.5.5.47
cisco	sg300-52_firmware	𝑥 ≤ 2.5.5.47
cisco	sf300-24_firmware	𝑥 ≤ 2.5.5.47
cisco	sf302-08_firmware	𝑥 ≤ 2.5.5.47
cisco	sf300-24mp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg300-10sfp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg300-28mp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg300-52p_firmware	𝑥 ≤ 2.5.5.47
cisco	sg300-52mp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg500-28mpp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg500-52mp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg500xg-8f8t_firmware	𝑥 ≤ 2.5.5.47
cisco	sf500-24_firmware	𝑥 ≤ 2.5.5.47
cisco	sf500-24p_firmware	𝑥 ≤ 2.5.5.47
cisco	sf500-48_firmware	𝑥 ≤ 2.5.5.47
cisco	sf500-48p_firmware	𝑥 ≤ 2.5.5.47
cisco	sg500-28_firmware	𝑥 ≤ 2.5.5.47
cisco	sg500-28p_firmware	𝑥 ≤ 2.5.5.47
cisco	sg500-52_firmware	𝑥 ≤ 2.5.5.47
cisco	sg500-52p_firmware	𝑥 ≤ 2.5.5.47
cisco	sg500x-24_firmware	𝑥 ≤ 2.5.5.47
cisco	sg500x-24p_firmware	𝑥 ≤ 2.5.5.47
cisco	sg500x-48_firmware	𝑥 ≤ 2.5.5.47
cisco	sg500x-48p_firmware	𝑥 ≤ 2.5.5.47
cisco	sg250x-24_firmware	𝑥 ≤ 2.5.5.47
cisco	sg250x-24p_firmware	𝑥 ≤ 2.5.5.47
cisco	sg250x-48_firmware	𝑥 ≤ 2.5.5.47
cisco	sg250x-48p_firmware	𝑥 ≤ 2.5.5.47
cisco	sg250-08_firmware	𝑥 ≤ 2.5.5.47
cisco	sg250-08hp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg250-10p_firmware	𝑥 ≤ 2.5.5.47
cisco	sg250-18_firmware	𝑥 ≤ 2.5.5.47
cisco	sg250-26_firmware	𝑥 ≤ 2.5.5.47
cisco	sg250-26hp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg250-26p_firmware	𝑥 ≤ 2.5.5.47
cisco	sg250-50_firmware	𝑥 ≤ 2.5.5.47
cisco	sg250-50hp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg250-50p_firmware	𝑥 ≤ 2.5.5.47
cisco	sf250-24_firmware	𝑥 ≤ 2.5.5.47
cisco	sf250-24p_firmware	𝑥 ≤ 2.5.5.47
cisco	sf250-48_firmware	𝑥 ≤ 2.5.5.47
cisco	sf250-48hp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg350-10_firmware	𝑥 ≤ 2.5.5.47
cisco	sg350-10p_firmware	𝑥 ≤ 2.5.5.47
cisco	sg350-10mp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg355-10p_firmware	𝑥 ≤ 2.5.5.47
cisco	sg350-28_firmware	𝑥 ≤ 2.5.5.47
cisco	sg350-28p_firmware	𝑥 ≤ 2.5.5.47
cisco	sg350-28mp_firmware	𝑥 ≤ 2.5.5.47
cisco	sf350-48_firmware	𝑥 ≤ 2.5.5.47
cisco	sf350-48p_firmware	𝑥 ≤ 2.5.5.47
cisco	sf350-48mp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg350xg-2f10_firmware	𝑥 ≤ 2.5.5.47
cisco	sg350xg-24f_firmware	𝑥 ≤ 2.5.5.47
cisco	sg350xg-24t_firmware	𝑥 ≤ 2.5.5.47
cisco	sg350xg-48t_firmware	𝑥 ≤ 2.5.5.47
cisco	sg350x-24_firmware	𝑥 ≤ 2.5.5.47
cisco	sg350x-24p_firmware	𝑥 ≤ 2.5.5.47
cisco	sg350x-24mp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg350x-48_firmware	𝑥 ≤ 2.5.5.47
cisco	sg350x-48p_firmware	𝑥 ≤ 2.5.5.47
cisco	sg350x-48mp_firmware	𝑥 ≤ 2.5.5.47
cisco	sx550x-16ft_firmware	𝑥 ≤ 2.5.5.47
cisco	sx550x-24ft_firmware	𝑥 ≤ 2.5.5.47
cisco	sx550x-12f_firmware	𝑥 ≤ 2.5.5.47
cisco	sx550x-24f_firmware	𝑥 ≤ 2.5.5.47
cisco	sx550x-24_firmware	𝑥 ≤ 2.5.5.47
cisco	sx550x-52_firmware	𝑥 ≤ 2.5.5.47
cisco	sg550x-24_firmware	𝑥 ≤ 2.5.5.47
cisco	sg550x-24p_firmware	𝑥 ≤ 2.5.5.47
cisco	sg550x-24mp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg550x-24mpp_firmware	𝑥 ≤ 2.5.5.47
cisco	sg550x-48_firmware	𝑥 ≤ 2.5.5.47
cisco	sg550x-48p_firmware	𝑥 ≤ 2.5.5.47
cisco	sg550x-48mp_firmware	𝑥 ≤ 2.5.5.47
cisco	sf550x-24_firmware	𝑥 ≤ 2.5.5.47
cisco	sf550x-24p_firmware	𝑥 ≤ 2.5.5.47
cisco	sf550x-24mp_firmware	𝑥 ≤ 2.5.5.47
cisco	sf550x-48_firmware	𝑥 ≤ 2.5.5.47
cisco	sf550x-48p_firmware	𝑥 ≤ 2.5.5.47
cisco	sf550x-48mp_firmware	𝑥 ≤ 2.5.5.47

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-20 - Improper Input Validation
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sbss-ipv6-dos-tsgqbffW