shadow: TOCTOU race condition (CVE-2013-4235) #shorts #breaking

CVE

Welcome! Today we are talking about a specific security vulnerability known as CVE-2013-4235. This vulnerability involves a time-of-check time-of-use race condition in the software package called 'shadow'. Essentially, a Time-of-Check Time-of-Use or TOCTOU race condition happens when a system's state is checked to make a decision, but this state can change before the decision is implemented. In the context of CVE-2013-4235, hackers could potentially exploit this race condition during operations like copying and removing directory trees. It's almost 10 years old and although it isn't an active zero-day vulnerability, its presence can pose significant risks. Users of the 'shadow' software should be particularly cautious as the effects could lead to unauthorized access and potential data integrity issues. No specific tools or attack events have been publicly mentioned for this vulnerability.

This chain involves the following actors

This following systems are involved

Attack entry point

Remediation actions

Exploitation actions

• https://security-tracker.debian.org/tracker/CVE-2013-4235
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2013-4235
• https://access.redhat.com/security/cve/cve-2013-4235
• https://lists.apache.org/thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
• https://security.gentoo.org/glsa/202210-26