CVE-2010-0433: Input Validation
First published: Tue Mar 02 2010(Updated: )
The kssl_keytab_is_available function in ssl/kssl.c in OpenSSL before 0.9.8n, when Kerberos is enabled but Kerberos configuration files cannot be opened, does not check a certain return value, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via SSL cipher negotiation, as demonstrated by a chroot installation of Dovecot or stunnel without Kerberos configuration files inside the chroot.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| OpenSSL libcrypto | <=0.9.8m | |
| OpenSSL libcrypto | =0.9.8 | |
| OpenSSL libcrypto | =0.9.8a | |
| OpenSSL libcrypto | =0.9.8b | |
| OpenSSL libcrypto | =0.9.8c | |
| OpenSSL libcrypto | =0.9.8d | |
| OpenSSL libcrypto | =0.9.8e | |
| OpenSSL libcrypto | =0.9.8f | |
| OpenSSL libcrypto | =0.9.8g | |
| OpenSSL libcrypto | =0.9.8h | |
| OpenSSL libcrypto | =0.9.8i | |
| OpenSSL libcrypto | =0.9.8j | |
| OpenSSL libcrypto | =0.9.8k | |
| OpenSSL libcrypto | =0.9.8l |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=567711
- http://cvs.openssl.org/chngview?cn=19374
- http://admin.fedoraproject.org/updates/openssl-0.9.8m-1.fc11
- https://rhn.redhat.com/errata/RHSA-2010-0162.html
- http://admin.fedoraproject.org/updates/openssl-0.9.8n-1.fc11
- http://admin.fedoraproject.org/updates/openssl-1.0.0-1.fc13
- http://admin.fedoraproject.org/updates/openssl-1.0.0-1.fc12
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=569774#c0
- http://admin.fedoraproject.org/updates/openssl-1.0.0-4.fc12
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=569774#c2
- https://git.openssl.org/?p=openssl.git;a=commitdiff;h=cca1cd9a3447dd067503e4a85ebd1679ee78a48e
- https://bugzilla.redhat.com/show_bug.cgi?id=569774
- http://aix.software.ibm.com/aix/efixes/security/openssl_advisory.asc
- http://groups.google.com/group/mailing.openssl.users/browse_thread/thread/c3e1ab0034ca4b4c/66aa896c3a78b2f7
- http://lists.fedoraproject.org/pipermail/package-announce/2010-April/038587.html
- http://lists.fedoraproject.org/pipermail/package-announce/2010-April/039561.html
- http://marc.info/?l=bugtraq&m=127128920008563&w=2
- http://marc.info/?l=bugtraq&m=127557640302499&w=2
- http://secunia.com/advisories/39461
- http://secunia.com/advisories/39932
- http://secunia.com/advisories/42724
- http://secunia.com/advisories/42733
- http://secunia.com/advisories/43311
- http://www.mail-archive.com/dovecot%40dovecot.org/msg26224.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:076
- http://www.openssl.org/news/changelog.html
- http://www.openwall.com/lists/oss-security/2010/03/03/5
- http://www.securityfocus.com/archive/1/516397/100/0/threaded
- http://www.vmware.com/security/advisories/VMSA-2011-0003.html
- http://www.vmware.com/support/vsphere4/doc/vsp_vc41_u1_rel_notes.html
- http://www.vupen.com/english/advisories/2010/0839
- http://www.vupen.com/english/advisories/2010/0916
- http://www.vupen.com/english/advisories/2010/0933
- http://www.vupen.com/english/advisories/2010/1216
- https://bugzilla.redhat.com/show_bug.cgi?id=567711
- https://kb.bluecoat.com/index?page=content&id=SA50
- https://lists.balabit.com/pipermail/syslog-ng-announce/2011-January/000101.html
- https://lists.balabit.com/pipermail/syslog-ng-announce/2011-January/000102.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12260
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6718
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9856
Frequently Asked Questions
What is the severity of CVE-2010-0433?
CVE-2010-0433 is classified as a denial of service vulnerability due to a NULL pointer dereference.
How do I fix CVE-2010-0433?
To fix CVE-2010-0433, upgrade OpenSSL to version 0.9.8n or later.
Who is affected by CVE-2010-0433?
CVE-2010-0433 affects all versions of OpenSSL prior to 0.9.8n with Kerberos enabled.
What types of attacks can exploit CVE-2010-0433?
CVE-2010-0433 can be exploited by remote attackers to crash the daemon by causing a denial of service.
Is there a workaround for CVE-2010-0433?
Currently, the recommended action for CVE-2010-0433 is to upgrade the OpenSSL library to eliminate the risk.
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- version/openssl libcrypto/0.9.8m
- version/openssl libcrypto/0.9.8
- version/openssl libcrypto/0.9.8a
- version/openssl libcrypto/0.9.8b
- version/openssl libcrypto/0.9.8c
- version/openssl libcrypto/0.9.8d
- version/openssl libcrypto/0.9.8e
- version/openssl libcrypto/0.9.8f
- version/openssl libcrypto/0.9.8g
- version/openssl libcrypto/0.9.8h
- version/openssl libcrypto/0.9.8i
- version/openssl libcrypto/0.9.8j
- version/openssl libcrypto/0.9.8k
- version/openssl libcrypto/0.9.8l