2015-01 Security Bulletin: Junos: jpppd core when MX Series router receives crafted PAP Authenticate-Request (CVE-2014-6382)

Product Affected:This issue can affect any MX Series broadband edge router running Junos OS 13.3R3 or later.

Problem:Using PPP authentication with a specifically crafted PAP Authenticate-Request may cause the Juniper PPP daemon (jpppd) to crash and restart. After PPPoE Discovery and LCP phase is successfully negotiated, when the crafted PAP Authenticate-Request is received, jpppd crashes and no response is sent by the broadband edge router to the subscriber. jpppd continues to crash every time the subscriber re-sends the PAP Authenticate-Request.This issue only affects MX Series routers deployed as broadband edge (BBE) routers. Other configurations of MX Series routers that do not enable BBE functionality are unaffected by this vulnerability.​Juniper SIRT is not aware of any malicious exploitation of this vulnerability.No other Juniper Networks products or platforms are affected by this issue.This issue has been assigned CVE-2014-6382​.

Solution:The following software releases have been updated to resolve this specific issue: Junos OS 13.3R6, 14.1R4, 14.1X50-D70, 14.2R2, and all subsequent releases.This issue is being tracked as PR 1040665 and is visible on the Customer Support website.KB16765 – “In which releases are vulnerabilities fixed?” describes which release vulnerabilities are fixed as per our End of Engineering and End of Life support policies.

Workaround:If possible, discontinue the use of PAP authentication for PPP subscribers.

Implementation:How to obtain fixed software:Security vulnerabilities in Junos are fixed in the next available Maintenance Release of each supported Junos version. In some cases, a Maintenance Release is not planned to be available in an appropriate time-frame. For these cases, Service Releases are made available in order to be more timely. Security Advisory and Security Notices will indicate which Maintenance and Service Releases contain fixes for the issues described. Upon request to JTAC, customers will be provided download instructions for a Service Release. Although Juniper does not provide formal Release Note documentation for a Service Release, a list of “PRs fixed” can be provided on request. Modification History: 2015-01-14: Initial publication.

Related Links: CVSS Score:7.8 (AV:N/AC:L/Au:N/C:N/I:N/A:C)

Risk Level:High

Risk Assessment:Information for how Juniper Networks uses CVSS can be found at KB 16446 “Common Vulnerability Scoring System (CVSS) and Juniper’s Security Advisories.”

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