|Bugzilla:||711419: CVE-2011-1526 krb5, krb5-appl: ftpd incorrect group privilege dropping (MITKRB5-SA-2011-005)|
It was found that ftpd, a Kerberos-aware FTP server, did not properly drop privileges. On Red Hat Enterprise Linux 5, the ftpd daemon did not check for the potential failure of the krb5_setegid() function call. On systems where the set real, set effective, or set saved group ID system calls might fail, a remote FTP user could use this flaw to gain unauthorized read or write access to files that were owned by the root group.
This issue was addressed in krb5-appl packages in Red Hat Enterprise Linux 6 via RHSA-2011:0920 and krb5 packages in Red Hat Enterprise Linux 5 via RHSA-2012:0306.
This issue is not planned to be addressed in Red Hat Enterprise Linux 4, where this issue was rated as having low security impact.
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Red Hat security errata
|Red Hat Enterprise Linux version 5 (krb5)||RHSA-2012:0306||February 21, 2012|
|Red Hat Enterprise Linux version 6 (krb5-appl)||RHSA-2011:0920||July 05, 2011|
Red Hat would like to thank the MIT Kerberos project for reporting this issue. Upstream acknowledges Tim Zingelman as the original reporter.
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