OESA-2023-1258

Dashboard / Vulnerabilities / OESA-2023-1258

OESA-2023-1258

Summary: shadow security update

Details: This package includes the necessary programs for converting plain password files to the shadow password format and to manage user and group accounts. Security Fix(es): In Shadow 4.13, it is possible to inject control characters into fields provided to the SUID program chfn (change finger). Although it is not possible to exploit this directly (e.g., adding a new user fails because \n is in the block list), it is possible to misrepresent the /etc/passwd file when viewed. Use of \r manipulations and Unicode characters to work around blocking of the : character make it possible to give the impression that a new user has been added. In other words, an adversary may be able to convince a system administrator to take the system offline (an indirect, social-engineered denial of service) by demonstrating that "cat /etc/passwd" shows a rogue user account.(CVE-2023-29383)

References: https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1258, https://nvd.nist.gov/vuln/detail/CVE-2023-29383