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Total 3 Tagged in ’#OpenSource’
  • Making a basic server with Java & Armeria
    InSeong 2018.09.13

    As some of you probably know, LINE has been actively open-sourcing projects including Armeria and Central Dogma. Today, I'd like to share a bit about Armeria and setting up a simple web server using Armeria.

    Armeria OpenSource Java microservices

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  • Buffer overflow in PJSIP, a VoIP open source library
    Kim Youngsung 2018.02.27

    He's a security engineer at LINE. He enjoys looking for bugs and is highly interested in secure coding.

    Hi all, I am Youngsung Kim (Facebook, Twitter) of the Application Security team at LINE and am in charge of evaluating security of LINE services. On this post, I'd like to share a vulnerability (CVE-2017-16872, AST-2017-009) of PJSIP, a VoIP open source library. PJSIP is a multimedia communication library based on the following standard protocols; SIP, SDP, RTP, STUN, TURN, and ICE. The Asterisk framework, widely used on IP-PBX and VoPI gateway has an SIP stack implemented based on PJSIP.

    The cause of the vulnerability was due to incautiousness about sign extension for Integers in the process of converting signed int to unsigned long when handling client's SIP requests on 64-bit environment. There was no window to report the security issue to the PJSIP development teams, so I made my report to the Asterisk's security page. Afterwards, I've consulted with George Joseph, an engineer at Asterisk, and the patch (PJSIP patch, Asterisk patch) has been applied on the pjproject v2.7.1. I'd like to express my gratitude to George for processing the patch.

    VoIP Security Vulnerability OpenSource CVE PJSIP PJPROJECT ASTERISK AdventCalendar

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  • Open-sourcing Armeria
    Lee Heuiseung (trustin) 2016.04.14

    He is a platform software engineer at LINE. He is also the founder of Netty and a co-founder of Apache MINA.

    Armeria is an asynchronous RPC/API client-server implementation built on top of Java 8 and Netty that went open-source last November under Apache License 2.0 by LINE Corporation. Its primary goal is to help engineers build high-performance asynchronous Thrift clients and servers that use HTTP/2 as a session layer protocol, although it is designed to be protocol-agnostic and highly extensible (for example, you can serve a directory of static files via HTTP/2 and run Java EE web applications).

    In this post, I'd like to focus on the steps that were taken to open-source an internal project rather than the technical aspect. If you are interested in the technical details of Armeria, you might want to check out the following slides presented last February during the 14th LINE Developer Meetup:

    Armeria OpenSource

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