Linux Kernel Local Privilege Escalation Vulnerability Technical Analysis and Solution

The memory subsystem of the Linux kernel contains a race condition in the way of handling the copy-on-write (COW) breakage of private read-only memory mappings. An unprivileged local user could exploit this vulnerability to gain write access to otherwise read-only memory mappings, thus escalating his or her privileges on the system.

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OpenSSH Remote Denial-of-Service Vulnerability Technical Analysis and Solution

OpenSSH contains a memory exhaustion issue during key exchange. An unauthenticated client can increase the memory allocated to each connection on the server to 384 MB, by repeating the KEXINIT process. An attacker can exploit this vulnerability by initiating multiple connections, to exhaust memory resources of the server and therefore lead to a denial of service.

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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.

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Zabbix SQL Injection Vulnerability Technical Analysis and Solution

On August 12, 2016, 1n3 disclosed by email an SQL injection vulnerability in jsrpc.php in Zabbix, which can be exploited via the “insert” statement while jsrpc.php is processing the profileIdx2 parameter. This vulnerability is of the same type as the officially announced vulnerability, which is caused by latest.php processing the toggle_ids parameter. The only difference between the two is the location.

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BadLock漏洞技术跟踪与风险防护

绿盟科技持续关注国内安全走势,早在3月份的时候第一时间发布了BadLock威胁预警通告。4月12日,微软补丁日如期而至。在这次微软发布的补丁中,包含了BadLock漏洞,该漏洞可对windows系统和Samba服务一律全版本通杀,危害程度不可小觑。对此,绿盟科技针对BadLock漏洞进行了技术跟踪分析并提供相应的防护建议。 阅读全文 “BadLock漏洞技术跟踪与风险防护” »

BadLock威胁预警通告

发布时间:2016年3月28日

2016年4月12日,关于 Microsoft Windows平台和Samba服务软件中存在的一个严重等级的安全漏洞将会被披露,定名为BadLock。 此漏洞由International Samba Core Team成员Stefan Metzmacher发现,并提交给Microsoft和Samba相关的部门。
目前,Microsoft和Samba的工程师们正在合作修复问题,补丁将会于2016年4月12日发布。
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