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Asterisk Project Security Advisory - AST-2013-005
Posted Aug 28, 2013
Authored by Matt Jordan | Site asterisk.org

Asterisk Project Security Advisory - A remotely exploitable crash vulnerability exists in the SIP channel driver if an invalid SDP is sent in a SIP request that defines media descriptions before connection information. The handling code incorrectly attempts to reference the socket address information even though that information has not yet been set.

tags | advisory
MD5 | b715f9c2eaad10cad18835c40db97b9c

Related Files

Asterisk Project Security Advisory - AST-2016-004
Posted Apr 14, 2016
Authored by Mark Michelson, George Joseph | Site asterisk.org

Asterisk Project Security Advisory - Asterisk may crash when processing an incoming REGISTER request if that REGISTER contains a Contact header with a lengthy URI. This crash will only happen for requests that pass authentication. Unauthenticated REGISTER requests will not result in a crash occurring. This vulnerability only affects Asterisk when using PJSIP as its SIP stack. The chan_sip module does not have this problem.

tags | advisory
MD5 | e359007a7da13be531dbe7c2837f3a46
Asterisk Project Security Advisory - AST-2016-003
Posted Feb 6, 2016
Authored by Richard Mudgett, Walter Dokes, Torrey Searle | Site asterisk.org

Asterisk Project Security Advisory - If no UDPTL packets are lost there is no problem. However, a lost packet causes Asterisk to use the available error correcting redundancy packets. If those redundancy packets have zero length then Asterisk uses an uninitialized buffer pointer and length value which can cause invalid memory accesses later when the packet is copied.

tags | advisory
MD5 | 35c17d57906a2a400e39bb6fbd40e4b1
Asterisk Project Security Advisory - AST-2016-002
Posted Feb 6, 2016
Authored by Richard Mudgett, Alexander Traud | Site asterisk.org

Asterisk Project Security Advisory - Setting the sip.conf timert1 value to a value higher than 1245 can cause an integer overflow and result in large retransmit timeout times. These large timeout values hold system file descriptors hostage and can cause the system to run out of file descriptors.

tags | advisory, overflow
MD5 | 5042769cb92f966de13e32154bee662e
Asterisk Project Security Advisory - AST-2016-001
Posted Feb 6, 2016
Authored by Joshua Colp, Alex A. Welzi | Site asterisk.org

Asterisk Project Security Advisory - The Asterisk HTTP server currently has a default configuration which allows the BEAST vulnerability to be exploited if the TLS functionality is enabled. This can allow a man-in-the-middle attack to decrypt data passing through it.

tags | advisory, web
MD5 | 6a4fbedbc5d908f3f403f2cb676b9c18
Asterisk Project Security Advisory - AST-2015-003
Posted Apr 9, 2015
Authored by Jonathan Rose | Site asterisk.org

Asterisk Project Security Advisory - When Asterisk registers to a SIP TLS device and and verifies the server, Asterisk will accept signed certificates that match a common name other than the one Asterisk is expecting if the signed certificate has a common name containing a null byte after the portion of the common name that Asterisk expected.

tags | advisory
advisories | CVE-2015-3008
MD5 | f0f26c3f1397558a8d419c20fb994556
Asterisk Project Security Advisory - AST-2015-002
Posted Jan 29, 2015
Authored by Mark Michelson, Olle Johansson | Site asterisk.org

Asterisk Project Security Advisory - CVE-2014-8150 reported an HTTP request injection vulnerability in libcURL. Asterisk uses libcURL in its func_curl.so module (the CURL() dialplan function), as well as its res_config_curl.so (cURL realtime backend) modules. Since Asterisk may be configured to allow for user-supplied URLs to be passed to libcURL, it is possible that an attacker could use Asterisk as an attack vector to inject unauthorized HTTP requests if the version of libcURL installed on the Asterisk server is affected by CVE-2014-8150.

tags | advisory, web
advisories | CVE-2014-8150
MD5 | 40713dbc27a6fb8e51bb53765591ef4e
Asterisk Project Security Advisory - AST-2015-001
Posted Jan 29, 2015
Authored by Mark Michelson, Y Ateya | Site asterisk.org

Asterisk Project Security Advisory - Asterisk may be configured to only allow specific audio or video codecs to be used when communicating with a particular endpoint. When an endpoint sends an SDP offer that only lists codecs not allowed by Asterisk, the offer is rejected. However, in this case, RTP ports that are allocated in the process are not reclaimed. This issue only affects the PJSIP channel driver in Asterisk. Users of the chan_sip channel driver are not affected. As the resources are allocated after authentication, this issue only affects communications with authenticated endpoints.

tags | advisory
MD5 | b700c0e717e1ace4e886b2f4400800f0
Asterisk Project Security Advisory - AST-2014-019
Posted Dec 10, 2014
Authored by Joshua Colp | Site asterisk.org

Asterisk Project Security Advisory - When handling a WebSocket frame the res_http_websocket module dynamically changes the size of the memory used to allow the provided payload to fit. If a payload length of zero was received the code would incorrectly attempt to resize to zero. This operation would succeed and end up freeing the memory but be treated as a failure. When the session was subsequently torn down this memory would get freed yet again causing a crash. Users of the WebSocket functionality also did not take into account that provided text frames are not guaranteed to be NULL terminated. This has been fixed in chan_sip and chan_pjsip in the applicable versions.

tags | advisory
MD5 | 199d71b570df3f72b699ecfa9a017dea
Asterisk Project Security Advisory - AST-2014-018
Posted Nov 21, 2014
Authored by Kevin Harwell, Gareth Palmer | Site asterisk.org

Asterisk Project Security Advisory - The DB dialplan function when executed from an external protocol (for instance AMI), could result in a privilege escalation.

tags | advisory, protocol
MD5 | 5f3ebc9cf9f2fb17c6c2dc4f44aba39e
Asterisk Project Security Advisory - AST-2014-017
Posted Nov 21, 2014
Authored by Kevin Harwell, Gareth Palmer | Site asterisk.org

Asterisk Project Security Advisory - The CONFBRIDGE dialplan function when executed from an external protocol (for instance AMI), could result in a privilege escalation. Also, the AMI action "ConfbridgeStartRecord" could also be used to execute arbitrary system commands without first checking for system access.

tags | advisory, arbitrary, protocol
MD5 | 6d75a797b464251b1e32034bc2191a06
Asterisk Project Security Advisory - AST-2014-016
Posted Nov 21, 2014
Authored by Joshua Colp | Site asterisk.org

Asterisk Project Security Advisory - When handling an INVITE with Replaces message the res_pjsip_refer module incorrectly assumes that it will be operating on a channel that has just been created. If the INVITE with Replaces message is sent in-dialog after a session has been established this assumption will be incorrect. The res_pjsip_refer module will then hang up a channel that is actually owned by another thread. When this other thread attempts to use the just hung up channel it will end up using freed channel which will likely cause a crash.

tags | advisory
MD5 | ad443124e8b31e3f67b0ef3190563e16
Asterisk Project Security Advisory - AST-2014-015
Posted Nov 21, 2014
Authored by Joshua Colp, Yaron Nahum | Site asterisk.org

Asterisk Project Security Advisory - The chan_pjsip channel driver uses a queue approach for actions relating to SIP sessions. There exists a race condition where actions may be queued to answer a session or send ringing AFTER a SIP session has been terminated using a CANCEL request. The code will incorrectly assume that the SIP session is still active and attempt to send the SIP response. The PJSIP library does not expect the SIP session to be in the disconnected state when sending the response and asserts.

tags | advisory
MD5 | 1f457cd6c67d3293e290a8b8a59622ab
Asterisk Project Security Advisory - AST-2014-014
Posted Nov 21, 2014
Authored by Joshua Colp, Ben Klang | Site asterisk.org

Asterisk Project Security Advisory - The ConfBridge application uses an internal bridging API to implement conference bridges. This internal API uses a state model for channels within the conference bridge and transitions between states as different things occur. Under load it is possible for some state transitions to be delayed causing the channel to transition from being hung up to waiting for media. As the channel has been hung up remotely no further media will arrive and the channel will stay within ConfBridge indefinitely.

tags | advisory
MD5 | 2945c50e19d44b99fd92e50ebc97bd9f
Asterisk Project Security Advisory - AST-2014-013
Posted Nov 21, 2014
Authored by Jonathan Rose | Site asterisk.org

Asterisk Project Security Advisory - The Asterisk module res_pjsip_acl provides the ability to configure ACLs that may be used to reject SIP requests from various hosts. In affected versions of Asterisk, this module fails to create and apply ACLs defined in pjsip.conf. This may be worked around by reloading res_pjsip manually after res_pjsip_acl is loaded.

tags | advisory
MD5 | ecf2c3145d6f7c7c95001d331ca29c60
Asterisk Project Security Advisory - AST-2014-012
Posted Nov 21, 2014
Authored by Andreas Steinmetz | Site asterisk.org

Asterisk Project Security Advisory - Many modules in Asterisk that service incoming IP traffic have ACL options ("permit" and "deny") that can be used to whitelist or blacklist address ranges. A bug has been discovered where the address family of incoming packets is only compared to the IP address family of the first entry in the list of access control rules. If the source IP address for an incoming packet is not of the same address family as the first ACL entry, that packet bypasses all ACL rules. For ACLs whose rules are all of the same address family, there is no issue.

tags | advisory
MD5 | ad7432df849fce8e8723e557e8bab00e
Asterisk Project Security Advisory - AST-2014-011
Posted Oct 21, 2014
Authored by Matt Jordan | Site asterisk.org

Asterisk Project Security Advisory - Asterisk suffered from the SSL POODLE vulnerability.

tags | advisory
advisories | CVE-2014-3566
MD5 | a170a03fa9b649c31b8476187a9185fb
Asterisk Project Security Advisory - AST-2014-010
Posted Sep 18, 2014
Authored by Matt Jordan, Philippe Lindheimer | Site asterisk.org

Asterisk Project Security Advisory - When an out of call message - delivered by either the SIP or PJSIP channel driver or the XMPP stack - is handled in Asterisk, a crash can occur if the channel servicing the message is sent into the ReceiveFax dialplan application while using the res_fax_spandsp module. Note that this crash does not occur when using the res_fax_digium module. While this crash technically occurs due to a configuration issue, as attempting to receive a fax from a channel driver that only contains textual information will never succeed, the likelihood of having it occur is sufficiently high as to warrant this advisory.

tags | advisory
MD5 | 1bf9a3407b5481e77edf775e3ccb0912
Asterisk Project Security Advisory - AST-2014-009
Posted Sep 18, 2014
Authored by Mark Michelson | Site asterisk.org

Asterisk Project Security Advisory - It is possible to trigger a crash in Asterisk by sending a SIP SUBSCRIBE request with unexpected mixes of headers for a given event package. The crash occurs because Asterisk allocates data of one type at one layer and then interprets the data as a separate type at a different layer. The crash requires that the SUBSCRIBE be sent from a configured endpoint, and the SUBSCRIBE must pass any authentication that has been configured. Note that this crash is Asterisk's PJSIP-based res_pjsip_pubsub module and not in the old chan_sip module.

tags | advisory
MD5 | 7ce4cdb7ad305b8527772e29666abf3a
Asterisk Project Security Advisory - AST-2014-008
Posted Jun 13, 2014
Authored by Mark Michelson | Site asterisk.org

Asterisk Project Security Advisory - When a SIP transaction timeout caused a subscription to be terminated, the action taken by Asterisk was guaranteed to deadlock the thread on which SIP requests are serviced. Note that this behavior could only happen on established subscriptions, meaning that this could only be exploited if an attacker bypassed authentication and successfully subscribed to a real resource on the Asterisk server.

tags | advisory
advisories | CVE-2014-4048
MD5 | e7f4e447ff2973429204f7f14511596c
Asterisk Project Security Advisory - AST-2014-007
Posted Jun 13, 2014
Authored by Richard Mudgett | Site asterisk.org

Asterisk Project Security Advisory - Establishing a TCP or TLS connection to the configured HTTP or HTTPS port respectively in http.conf and then not sending or completing a HTTP request will tie up a HTTP session. By doing this repeatedly until the maximum number of open HTTP sessions is reached, legitimate requests are blocked.

tags | advisory, web, tcp
advisories | CVE-2014-4047
MD5 | f6bc42691087326bc220a4aa850a8c2e
Asterisk Project Security Advisory - AST-2014-006
Posted Jun 13, 2014
Authored by Jonathan Rose, Corey Farrell | Site asterisk.org

Asterisk Project Security Advisory - Manager users can execute arbitrary shell commands with the MixMonitor manager action. Asterisk does not require system class authorization for a manager user to use the MixMonitor action, so any manager user who is permitted to use manager commands can potentially execute shell commands as the user executing the Asterisk process.

tags | advisory, arbitrary, shell
advisories | CVE-2014-4046
MD5 | 4c818a4e650adae570ab2dafa1b04cc5
Asterisk Project Security Advisory - AST-2014-005
Posted Jun 13, 2014
Authored by John Bigelow, Kevin Harwell | Site asterisk.org

Asterisk Project Security Advisory - A remotely exploitable crash vulnerability exists in the PJSIP channel driver's pub/sub framework. If an attempt is made to unsubscribe when not currently subscribed and the endpoint's "sub_min_expiry" is set to zero, Asterisk tries to create an expiration timer with zero seconds, which is not allowed, so an assertion raised.

tags | advisory
advisories | CVE-2014-4045
MD5 | 7918265ad799a0a1292fa023cd1e3c3b
Asterisk Project Security Advisory - AST-2014-004
Posted Mar 11, 2014
Authored by Mark Michelson, Matt Jordan | Site asterisk.org

Asterisk Project Security Advisory - A remotely exploitable crash vulnerability exists in the PJSIP channel driver's handling of SUBSCRIBE requests. If a SUBSCRIBE request is received for the presence Event, and that request has no Accept headers, Asterisk will attempt to access an invalid pointer to the header location. Note that this issue was fixed during a re-architecture of the res_pjsip_pubsub module in Asterisk 12.1.0. As such, this issue has already been resolved in a released version of Asterisk. This notification is being released for users of Asterisk 12.0.0.

tags | advisory
advisories | CVE-2014-2289
MD5 | f9984c9c3245f1133638fada061a2940
Asterisk Project Security Advisory - AST-2014-003
Posted Mar 11, 2014
Authored by Joshua Colp | Site asterisk.org

Asterisk Project Security Advisory - A remotely exploitable crash vulnerability exists in the PJSIP channel driver if the "qualify_frequency" configuration option is enabled on an AOR and the remote SIP server challenges for authentication of the resulting OPTIONS request. The response handling code wrongly assumes that a PJSIP endpoint will always be associated with an outgoing request which is incorrect.

tags | advisory, remote
advisories | CVE-2014-2288
MD5 | dd6a6ccd5211873a753b83153d64e8d6
Asterisk Project Security Advisory - AST-2014-002
Posted Mar 11, 2014
Authored by Kinsey Moore, Colin Farrell | Site asterisk.org

Asterisk Project Security Advisory - An attacker can use all available file descriptors using SIP INVITE requests, which can result in a denial of service.

tags | advisory, denial of service
advisories | CVE-2014-2287
MD5 | 3d76dd3c52bb750a6281fbfa6dff8ae1
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