U programskom paketu krb5 otkrivene su tri sigurnosne ranjivosti koje udaljeni zlonamjerni korisnici mogu iskoristiti za izvođenje DoS napada, zaobilaženje ograničenja i izmjenu proizvoljnih datoteka.
Dvije ranjivosti su uzrokovane greškama u funkcijama "krb5_ldap_lockout_audit" i "lookup_lockout_policy". Treća nepravilnost je posljedica nepravilne provjere vrijednosti "krb5_setegid" u datoteci "ftpd.c".
Posljedica:
Sve ranjivosti mogu iskoristiti udaljeni napadači kako bi izveli DoS napad, zaobišli zabranu pristupa ili pregledavali/mijenjali proizvoljne datoteke.
openSUSE Security Update: krb5: fixed kdc remote denial of service (
CVE-2011-1528, CVE-2011-1529) and unauthorized file access (CVE-2011-1526)
______________________________________________________________________________
Announcement ID: openSUSE-SU-2011:1169-1
Rating: important
References: #719393
Cross-References: CVE-2011-1526 CVE-2011-1528 CVE-2011-1529
Affected Products:
openSUSE 11.4
openSUSE 11.3
______________________________________________________________________________
An update that fixes three vulnerabilities is now available.
Description:
The following issues have been fixed:
- CVE-2011-1528: In releases krb5-1.8 and later, the KDC
can crash due to an assertion failure.
- CVE-2011-1529: In releases krb5-1.8 and later, the KDC
can crash due to a null pointer dereference.
Both bugs could be triggered by unauthenticated remote
attackers. Additionally CVE-2011-1526 was fixed that
allowed authenticated users to access files via krb5 ftpd
they should not have access to.
Patch Instructions:
To install this openSUSE Security Update use YaST online_update.
Alternatively you can run the command listed for your product:
- openSUSE 11.4:
zypper in -t patch krb5-5303
- openSUSE 11.3:
zypper in -t patch krb5-5303
To bring your system up-to-date, use "zypper patch".
Package List:
- openSUSE 11.4 (i586 x86_64):
krb5-1.8.3-16.19.1
krb5-appl-clients-1.0-7.10.1
krb5-appl-servers-1.0-7.10.1
krb5-client-1.8.3-16.19.1
krb5-devel-1.8.3-16.19.1
krb5-plugin-kdb-ldap-1.8.3-16.19.1
krb5-plugin-preauth-pkinit-1.8.3-16.19.1
krb5-server-1.8.3-16.19.1
- openSUSE 11.4 (x86_64):
krb5-32bit-1.8.3-16.19.1
krb5-devel-32bit-1.8.3-16.19.1
- openSUSE 11.3 (i586 x86_64):
krb5-1.8.1-5.11.1
krb5-appl-clients-1.0-4.3.1
krb5-appl-servers-1.0-4.3.1
krb5-client-1.8.1-5.11.1
krb5-devel-1.8.1-5.11.1
krb5-plugin-kdb-ldap-1.8.1-5.11.1
krb5-plugin-preauth-pkinit-1.8.1-5.11.1
krb5-server-1.8.1-5.11.1
- openSUSE 11.3 (x86_64):
krb5-32bit-1.8.1-5.11.1
krb5-devel-32bit-1.8.1-5.11.1
References:
http://support.novell.com/security/cve/CVE-2011-1526.html
http://support.novell.com/security/cve/CVE-2011-1528.html
http://support.novell.com/security/cve/CVE-2011-1529.html
https://bugzilla.novell.com/719393
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