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ciscoCiscoCISCO-SA-20130306-CVE-2013-1154
HistoryMar 06, 2013 - 6:23 p.m.

Cisco Small Business Switches SSH Packet Processing Denial of Service Vulnerability

2013-03-0618:23:51
tools.cisco.com
5

5 Medium

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

0.003 Low

EPSS

Percentile

70.2%

Cisco Small Business Switches contain a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition to features that rely on SSH or SSL protocols.

The vulnerability is due to the processing flaw in malformed packets in the code used by SSH and SSL. An unauthenticated, remote attacker could exploit this vulnerability by sending malformed SSH or SSL packets to the device. An exploit could allow the attacker to cause a denial of service for the features requiring SSH or SSL support.

Cisco has confirmed this vulnerability and released updated software.

To exploit this vulnerability, an attacker must be able to send crafted SSH or SSL packets to the targeted device which may require the attacker to have access to trusted, internal networks, decreasing the likelihood of a successful attack.

The vulnerability does not affect the entire device. Features that need the SSL/TLS layer to encrypt data such as SSH, HTTPS, and Secure Sensitive Data are affected.

Cisco would like to thank Hisashi Kojima and Masahiro Nakada of Fujitsu Laboratories LTD for discovering this vulnerability.

Affected configurations

Vulners
Node
cisco200_series_smart_switchesMatchany
OR
cisco300_series_managed_switchesMatchany
OR
ciscosmall_business_500_series_stackable_managed_switches_firmwareMatchany
OR
ciscosmall_business_srp521wMatch200 Series Smart Switches
OR
ciscosmall_business_srp521wMatch300 Series Managed Switches
OR
ciscosmall_business_srp521wMatch500 Series Stackable Managed Switches

5 Medium

CVSS2

Access Vector

Access Complexity

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

0.003 Low

EPSS

Percentile

70.2%

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