CVE-2011-1526

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.

Published: 2011-07-11 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-1526 is rated Moderate Risk (60.8/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 3.94%). EPSS rose +3.67% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-1526

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.27% 3.94% +3.67%
2 2025-11-16 0.23% 0.27% +0.04%
3 2025-03-30 — 0.23% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-1526

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 2.0 MEDIUM
AV:N/AC:L/Au:S/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.0 6.4 [email protected]

Weakness enumeration for CVE-2011-1526

OS Trackers for CVE-2011-1526

vendor priority summary link
gentoo normal CVE-2011-1526: 1 GLSA(s) (201201-14), 1 atom(s) (app-crypt/mit-krb5-appl); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-1526
redhat high — https://access.redhat.com/security/cve/CVE-2011-1526
ubuntu medium CVE-2011-1526 medium priority: Ubuntu including 2 source packages (krb5, krb5-appl), 34 status rows across 17 suites (hardy, lucid, maverick, natty, oneiric, precise, quantal, raring, saucy, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): not-affected 16, ignored 9, DNE 8, released 1. https://ubuntu.com/security/CVE-2011-1526

Affected software / configurations for CVE-2011-1526

Vendor Product Version Raw CPE
mit krb5-appl < 1.0.1 cpe:2.3:a:mit:krb5-appl:*:*:*:*:*:*:*:*
debian debian_linux 5.0 cpe:2.3:o:debian:debian_linux:5.0:*:*:*:*:*:*:*
debian debian_linux 6.0 cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*
fedoraproject fedora 14 cpe:2.3:o:fedoraproject:fedora:14:*:*:*:*:*:*:*
fedoraproject fedora 15 cpe:2.3:o:fedoraproject:fedora:15:*:*:*:*:*:*:*
opensuse opensuse 11.3 cpe:2.3:o:opensuse:opensuse:11.3:*:*:*:*:*:*:*
opensuse opensuse 11.4 cpe:2.3:o:opensuse:opensuse:11.4:*:*:*:*:*:*:*
suse linux_enterprise_desktop 10 cpe:2.3:o:suse:linux_enterprise_desktop:10:sp4:*:*:-:*:*:*
suse linux_enterprise_desktop 11 cpe:2.3:o:suse:linux_enterprise_desktop:11:sp1:*:*:*:*:*:*
suse linux_enterprise_server 10 cpe:2.3:o:suse:linux_enterprise_server:10:sp2:*:*:*:*:*:*
suse linux_enterprise_server 10 cpe:2.3:o:suse:linux_enterprise_server:10:sp3:*:*:ltss:*:*:*
suse linux_enterprise_server 10 cpe:2.3:o:suse:linux_enterprise_server:10:sp4:*:*:-:*:*:*
suse linux_enterprise_server 11 cpe:2.3:o:suse:linux_enterprise_server:11:sp1:*:*:*:-:*:*
suse linux_enterprise_server 11 cpe:2.3:o:suse:linux_enterprise_server:11:sp1:*:*:-:vmware:*:*
suse linux_enterprise_software_development_kit 10 cpe:2.3:o:suse:linux_enterprise_software_development_kit:10:sp4:*:*:*:*:*:*
suse linux_enterprise_software_development_kit 11 cpe:2.3:o:suse:linux_enterprise_software_development_kit:11:sp1:*:*:*:*:*:*

References for CVE-2011-1526

URL Tags
http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062681.html Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2011-July/062699.html Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2011-10/msg00009.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00002.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00004.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00005.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00010.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00011.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00014.html Mailing List Third Party Advisory
http://secunia.com/advisories/45145 Third Party Advisory
http://secunia.com/advisories/45157 Third Party Advisory
http://secunia.com/advisories/48101 Third Party Advisory
http://securityreason.com/securityalert/8301 Third Party Advisory
http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-005.txt Patch Vendor Advisory
http://www.debian.org/security/2011/dsa-2283 Third Party Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2011:117 Third Party Advisory
http://www.osvdb.org/73617 Broken Link
http://www.redhat.com/support/errata/RHSA-2011-0920.html Third Party Advisory
http://www.securityfocus.com/archive/1/518733/100/0/threaded Third Party Advisory VDB Entry
http://www.securityfocus.com/bid/48571 Patch Third Party Advisory VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=711419 Issue Tracking Third Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/68398 Third Party Advisory VDB Entry
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