Memory corruption in Cisco Small Business Series Switches

1) Buffer overflow

EUVDB-ID: #VU19026

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-1892

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a remote attacker to cause a memory corruption on affected devices.

The vulnerability exists due to improper validation of HTTPS packets in the Secure Sockets Layer (SSL) input packet processor. A remote attacker can send a malformed HTTPS packet to the management web interface and cause an unexpected reload of the devices, resulting in a denial of service (DoS) condition.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Cisco Small Business 500 Series Stackable Managed Switches: before 1.4.10.6

Cisco Small Business 300 Series Managed Switches: before 1.4.10.6

Cisco Small Business 200 Series Smart Switches: before 1.4.10.6

CPE2.3

• cpe:2.3:h:cisco_systems:cisco_small_business_500_series_stackable_managed_switches:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_small_business_300_series_managed_switches:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco_systems:cisco_small_business_200_series_smart_switches:*:*:*:*:*:*:*:*

External links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-sbss-memcorrupt

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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