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[{"id":483,"title":"Self-taught through trial and error","votes":545,"type":"x","order":1,"pct":78.42,"resources":[]},{"id":484,"title":"Formal training or courses","votes":30,"type":"x","order":2,"pct":4.32,"resources":[]},{"id":485,"title":"A job that required it","votes":34,"type":"x","order":3,"pct":4.89,"resources":[]},{"id":486,"title":"Other","votes":86,"type":"x","order":4,"pct":12.37,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350
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210

Ubuntu and Fedora: Critical Glibc Bug Leads to Privilege Escalation

A notorious buffer overflow vulnerability dubbed “Looney Tunables” was recently found in the GNU C Library. This severe bug exists in the glibc dynamic loader ld.so while processing the GLIBC_TUNABLES environment variable ( CVE-2023-4911 ). This vulnerability was introduced in April 2021 and poses a significant threat to systems with default installations of Fedora 37 and 38, Ubuntu 22.04 and 23.04, and Debian 12 and 13. . According to the security researchers who discovered this vulnerability, "This environment variable, intended to fine-tune and optimize applications linked with glibc, is an essential tool for developers and system administrators. Its misuse or exploitation broadly affects system performance, reliability, and security." A local user can exploit the Looney Tunables flaw to gain full root privileges on impacted systems, potentially resulting in data breaches and system compromise. Debian , Fedora , Gentoo , Oracle , RedHat, and Ubuntu have released critical glibc security updates to mitigate this severe bug. Given this vulnerability's damaging repercussions on impacted systems, if left unpatched, we urge all impacted users to update immediately to protect against privilege escalation attacks potentially leading to downtime and compromise. To stay on top of essential updates released by the open-source programs and applications you use, register as a LinuxSecurity user , subscribe to our Linux Advisory Watch newsletter, and customize your advisories for your distro(s). This will enable you to stay up-to-date on the latest, most significant issues impacting the security of your systems. Follow @LS_Advisories on Twitter for real-time updates on advisories for your distro(s) . . A significant Linux kernel vulnerability enables unauthorized users to gain elevated privileges, jeopardizing system integrity on several operating systems.. glibc Security Update, Local Privilege Escalation, Linux Critical Bug. . Brittany Day

Calendar 2 Oct 19, 2023 User Avatar Brittany Day Security Vulnerabilities
215

X.Org Server CVE-2023-0494 Critical Local Escalation Threat

The X.Org Server, a commonly used component to the Linux desktop, keeps on giving when it comes to security vulnerabilities with its massive, aging, and ill-maintained code-base. Disclosed on Monday night was CVE-2023-0494 as the latest security advisory and another discovery by the Trend Micro Zero Day Initiative. . CVE-2023-0494 entails local privilege elevation on systems where the X.Org Server is privileged and remote code execution is supported for SSH X forwarding sessions. Thankfully for many modern X.Org Server environments these days, the X.Org Server is no longer run as root / elevated privileges but for older systems and in other select configurations unfortunately remains running in such a vulnerable configuration. The CVE-2023-0494 vulnerability involves a use-after-free condition within DeepCopyPointerClasses for allowing reading and writing to freed memory via ProcXkbSetDeviceInfo() and ProcXkbGetDeviceInfo(). The link for this article located at Phoronix is no longer available. . CVE-2023-0495 leads to unauthorized access in OpenSSH installations under certain conditions.. X.Org Server, Local Escalation, Security Threat. . Brittany Day

Calendar 2 Feb 22, 2023 User Avatar Brittany Day Desktop Security
79

Local Privilege Escalation in Mac OS X Tiger Exploited by Researcher

Before his coffee was cold he had found a local privilege escalation vulnerability in Mac OS X Tiger, which could allow people to elevate from normal user to full super user, and had written code that could exploit the hole.. "I just think that I got lucky, but that's what I always think when I find a bug that quickly," he said in an interview on Wednesday. Dai Zovi has been exploiting Macs for a long time, publishing his first Mac OS X shellcode (code used as the payload in an exploitation of a vulnerability) for the PowerPC in July 2001. He said he has reported more than 10 vulnerabilities to Apple over the years and does so out of love for the platform. The link for this article located at CNET is no longer available. . Investigate a regional privilege escalation flaw within Mac OS X and understand how analysts take advantage of weaknesses to enhance security.. Local Escalation, Exploit Research, Security Flaws, Mac OS Techniques. . LinuxSecurity.com Team

Calendar 2 Aug 27, 2009 User Avatar LinuxSecurity.com Team Security Projects
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[{"id":483,"title":"Self-taught through trial and error","votes":545,"type":"x","order":1,"pct":78.42,"resources":[]},{"id":484,"title":"Formal training or courses","votes":30,"type":"x","order":2,"pct":4.32,"resources":[]},{"id":485,"title":"A job that required it","votes":34,"type":"x","order":3,"pct":4.89,"resources":[]},{"id":486,"title":"Other","votes":86,"type":"x","order":4,"pct":12.37,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350
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