Memcached多个整数溢出漏洞技术分析与防护方案

2016年10月31日(当地时间),思科Talos团队在其官网上公布了三个Memcached服务器的整数溢出漏洞。绿盟科技随即发布威胁预警通告,通告将该漏洞定义为高级,这意味着影响范围比较广,危害严重,利用难度较低,绿盟科技将实施7*24小时内部应急跟踪,24小时内完成技术分析、产品升级和防护方案。

绿盟科技能源行业10月安全通告

绿盟科技刚刚发布的能源行业月度安全通告10月刊,报告内容十分详实,包括安全事件及漏洞、安全技术及分析、绿盟科技解决方案、绿盟科技动态等几个方面,报告主要内容如下。

OpenSSH远程拒绝服务漏洞技术分析与防护方案

OpenSSH在秘钥交换过程中存在一个内存耗尽问题,一个未经认证的客户端,可以通过重复KEXINIT过程,使服务器上每个连接的内存分配增加至384MB,如果攻击者利用该漏洞,发起多个连接,会使服务器的内存耗尽,造成拒绝服务攻击。该漏洞存在于函数kex_input_kexinit()中,该漏洞编号为CVE-2016-8858。

ISC BIND 9 Denial-of-Service Technical Analysis and Solution

Internet Systems Consortium (ISC) officially released a security advisory to announce a vulnerability (CVE-2016-2776) and its fixing. The vulnerability exists in buffer.c. When constructing a response packet for a specially crafted query request, BIND will encounter an assertion failure, causing the program to crash and therefore a denial of service.

绿盟科技2016网络视频监控系统安全报告

近期国外多起DDoS攻击事件 涉及国内视频监控系统生成厂商 ,这些事件让 Mirai物联网恶意软件浮出水面 。同时,欧洲委员会正在规划新的物联网法规, 国际云安全联盟CSA发布物联网安全指南 。一时间物联网安全已经不再是理论,而是需要切实解决的问题。为此,绿盟科技旗下三个部门联合发布2016网络视频监控系统安全报告。

MySQL Remote Code Execution/Privilege Escalation Vulnerability Technical Analysis and Solution

On September 12, 2016, legalhackers.com released a security advisory concerning a 0-day vulnerability that is assigned CVE-2016-6662. This vulnerability allows attackers to remotely inject malicious settings into a MySQL configuration file (my.cnf), leading to critical consequences. It affects MySQL servers in default configuration in all version branches (5.7, 5.6, and 5.5), including the latest versions. MySQL clones like MariaDB and PerconaDB are also affected.

OpenSSL Patches Introducing New Vulnerabilities Technical Analysis and Solution

On September 22, 2016, OpenSSL released an update advisory for three branch products to fix multiple vulnerabilities. The versions after update are 1.1.0a, 1.0.2i, and 1.0.1u. However, the security update introduced new vulnerabilities: 1.1.0a introduced CVE-2016-6309, and 1.0.2i introduced CVE-2016-7052.