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CVE-2010-0433

The kssl_keytab_is_available function in ssl/kssl.c in OpenSSL before 0.9.8n, when Kerberos is...

4.3 Medium

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.

Exploit likelihood

7.86%Up 0.3 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 4.3

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.

Record
CVE-2010-0433
CVSS 2.0
4.3 MediumAV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness
CWE-20
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2010-0433
Updated
2026-11-02
EUVDEUVD-2010-0464 No score

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.

Record
EUVD-2010-0464
Updated
2026-11-03
GitHub AdvisoriesGHSA-5gv7-x3p9-2mf6 No score

The kssl_keytab_is_available function in ssl/kssl.c in OpenSSL before 0.9.8n, when Kerberos is...

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.

Record
GHSA-5gv7-x3p9-2mf6
Weakness
CWE-20
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
openssl
Red Hat:enterprise_linux:5::client_workstation
From an advisory covering 3 CVEs
 before 0:0.9.8e-12.el5_4.6
0:0.9.8e-12.el5_4.6
openssl-debuginfo
Red Hat:enterprise_linux:5::client_workstation
From an advisory covering 3 CVEs
 before 0:0.9.8e-12.el5_4.6
0:0.9.8e-12.el5_4.6
openssl-devel
Red Hat:enterprise_linux:5::client_workstation
From an advisory covering 3 CVEs
 before 0:0.9.8e-12.el5_4.6
0:0.9.8e-12.el5_4.6
openssl
Red Hat:enterprise_linux:5::client
From an advisory covering 3 CVEs
 before 0:0.9.8e-12.el5_4.6
0:0.9.8e-12.el5_4.6
openssl-debuginfo
Red Hat:enterprise_linux:5::client
From an advisory covering 3 CVEs
 before 0:0.9.8e-12.el5_4.6
0:0.9.8e-12.el5_4.6
openssl-perl
Red Hat:enterprise_linux:5::client
From an advisory covering 3 CVEs
 before 0:0.9.8e-12.el5_4.6
0:0.9.8e-12.el5_4.6
openssl
Red Hat:enterprise_linux:5::server
From an advisory covering 3 CVEs
 before 0:0.9.8e-12.el5_4.6
0:0.9.8e-12.el5_4.6
openssl-debuginfo
Red Hat:enterprise_linux:5::server
From an advisory covering 3 CVEs
 before 0:0.9.8e-12.el5_4.6
0:0.9.8e-12.el5_4.6
openssl-devel
Red Hat:enterprise_linux:5::server
From an advisory covering 3 CVEs
 before 0:0.9.8e-12.el5_4.6
0:0.9.8e-12.el5_4.6
openssl-perl
Red Hat:enterprise_linux:5::server
From an advisory covering 3 CVEs
 before 0:0.9.8e-12.el5_4.6
0:0.9.8e-12.el5_4.6

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2010-0433 is a medium vulnerability (CVSS 4.3) in Openssl, published March 5, 2010. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 7.86%, the 94th percentile. No source names a fixed version.

References

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