Skip to content
Fencer Intel
medium 6.5

CVE-2011-1526 json

ftpd.c in the GSS-API FTP daemon in MIT Kerberos Version 5 Applications (aka krb5-appl) 1.0.1 and earlier does not check the krb5_setegid r…

published 2011-07-11 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-1527

cvss
6.5
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.9%
EPSS 3.9% chance of exploitation in 30 days, percentile 90%
public exploits
0
none known

Summary

ftpd.c in the GSS-API FTP daemon in MIT Kerberos Version 5 Applications (aka krb5-appl) 1.0.1 and earlier does not check the krb5_setegid return value, which allows remote authenticated users to bypass intended group access restrictions, and create, overwrite, delete, or read files, via standard FTP commands, related to missing autoconf tests in a configure script.

Patch / fix

  • mit krb5-appl 1.0.1
  • krb5 RHEL 5 1.6.1-70.el5
  • krb5-libs RHEL 5 1.6.1-70.el5
  • krb5-server RHEL 5 1.6.1-70.el5
  • krb5-server-ldap RHEL 5 1.6.1-70.el5
  • krb5-workstation RHEL 5 1.6.1-70.el5
  • krb5-appl RHEL 6 1.0.1-2.el6_1.1
  • krb5-appl-clients RHEL 6 1.0.1-2.el6_1.1
  • krb5-appl-servers RHEL 6 1.0.1-2.el6_1.1

red hat advisories RHSA-2012:0306RHSA-2011:0920

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2011-1526 updated cvss 5.5

krb5-appl: ftpd incorrect group privilege dropping (MITKRB5-SA-2011-005)

  • Red Hat Enterprise Linux 4 krb5
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux (v. 5 server) krb5 1.6.1-70.el5, krb5-libs 1.6.1-70.el5, krb5-server 1.6.1-70.el5, krb5-server-ldap 1.6.1-70.el5, krb5-workstation 1.6.1-70.el5 Red Hat Enterprise Linux Desktop (v. 5 client) krb5 1.6.1-70.el5, krb5-libs 1.6.1-70.el5, krb5-workstation 1.6.1-70.el5 Red Hat Enterprise Linux Desktop Workstation (v. 5 client) krb5 1.6.1-70.el5, krb5-server 1.6.1-70.el5, krb5-server-ldap 1.6.1-70.el5
    fixed: vendor fix RHSA-2012:0306
  • Red Hat Enterprise Linux Server (v. 6) krb5-appl 1.0.1-2.el6_1.1, krb5-appl-clients 1.0.1-2.el6_1.1, krb5-appl-servers 1.0.1-2.el6_1.1
    fixed: vendor fix RHSA-2011:0920

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

3.94% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P

Classification

Weakness
  • CWE-269 Improper Privilege Management

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.