CVE-2011-1526
Description
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.
Statement
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.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v2 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.5 | 6.5 | N/A |
| Attack Vector | Network | Network | N/A |
| Access Complexity | Low | Low | N/A |
| Authentication | Single | Single | N/A |
| Confidentiality Impact | Partial | Partial | N/A |
| Integrity Impact | Partial | Partial | N/A |
| Availability Impact | None | Partial | N/A |
Vector
Red Hat: AV:N/AC:L/Au:S/C:P/I:P/A:N
NVD: AV:N/AC:L/Au:S/C:P/I:P/A:P
Acknowledgements
Red Hat would like to thank MIT Kerberos project for reporting this issue. Upstream acknowledges Tim Zingelman as the original reporter.
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