asebovirtual.blogg.se - Cisco ios xe srst

CISCO IOS XE SRST SOFTWARE

The image name appears in parentheses followed by the Cisco IOS Software release number and release name. If the device is running Cisco IOS Software, the system banner displays text similar to Cisco Internetwork Operating System Software or Cisco IOS Software. To determine which Cisco IOS Software release is running on a Cisco product, administrators can log in to the device, use the show version command in the command-line interface, and then refer to the system banner that appears. Note: In cases where SIP is running over TCP transport, a TCP three-way handshake is necessary to exploit this vulnerability.ĭetermining the Cisco IOS or IOS XE Software Release This vulnerability can be exploited with SIP over IPv4 or IPv6. Only traffic destined to the device can trigger the vulnerability transit SIP traffic is not an exploit vector. This vulnerability is triggered when a device that is running Cisco IOS, IOS XE, or Cisco Unified Communications Manager Software processes malformed SIP messages. Instead, it is recommended that administrators use the show processes | include SIP command to determine whether the device is processing SIP messages. Note: Because there are several ways that a device running Cisco IOS Software can start processing SIP messages, administrators are advised not to rely on the presence of specific configuration commands. In the following example, the presence of the processes CCSIP_UDP_SOCKET or CCSIP_TCP_SOCKET indicates that the Cisco IOS device will process SIP messages:ġ49 Mwe 40F48254 4 1 400023108/24000 0 CCSIP_UDP_SOCKETġ50 Mwe 40F48034 4 1 400023388/24000 0 CCSIP_TCP_SOCKET !In addition to inspecting the Cisco IOS device configuration for a dial-peer command that causes the device to process SIP messages, administrators can also use the show processes | include SIP command to determine whether Cisco IOS Software is running the processes that handle SIP messages. An example of an affected Cisco IOS or IOS XE Software configuration follows:

In addition, several features in Cisco Unified Communications Manager Express, such as ePhones, will also automatically start the SIP process when they are configured, causing the device to start processing SIP messages. Support team for assistance in upgrading to a supported release of CiscoĬreating a dial peer by issuing the dial-peer configuration command will start the SIP processes, causing the Cisco IOS device to process SIP messages.

Unified Communications Manager 8.x releases should contact their Cisco The End-of-Software-Maintenance milestone on July 26, 2015. Note: Cisco Unified Communications Manager release 8.x reached Cisco Unified Communications Manager 11.x.Cisco Unified Communications Manager 10.x.

Cisco Unified Communications Manager 9.x.

Cisco Unified Communications Manager 8.x.

For information about the earliest Cisco Unified Communications Software release that fixes the vulnerability described in this advisory, see the "Fixed Software" section. The following Cisco Unified Communications Manager software releases are vulnerable. Recent releases of Cisco IOS and IOS XE Software do not process SIP messages by default. This vulnerability affects Cisco devices that are running a vulnerable release of Cisco IOS, IOS XE, or Cisco Unified Communications Manager Software that is configured to process SIP messages.įor information about which Cisco IOS and IOS XE Software releases are vulnerable, see the "Fixed Software" section of this advisory. All the vulnerabilities have a Security Impact Rating of "High." For a complete list of advisories and links to them, see Cisco Event Response: Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication. This advisory is part of the March 23, 2016, release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication, which includes six Cisco Security Advisories that describe six vulnerabilities. This advisory is available at the following link: There are no workarounds that address this vulnerability other than disabling SIP on the vulnerable device. An exploit could allow the attacker to cause a memory leak and eventual reload of the affected device.Ĭisco has released software updates that address this vulnerability. An attacker could exploit this vulnerability by sending malformed SIP messages to be processed by an affected device. The vulnerability is due to improper processing of malformed SIP messages. A vulnerability in the Session Initiation Protocol (SIP) gateway implementation in Cisco IOS, IOS XE, and Cisco Unified Communications Manager Software could allow an unauthenticated, remote attacker to cause a memory leak and eventual reload of an affected device.