CVE-2020-10730: Use After Free
A NULL pointer dereference, or possible use-after-free flaw was found in Samba AD LDAP server in versions before 4.10.17, before 4.11.11 and before 4.12.4. Although some versions of Samba shipped with Red Hat Enterprise Linux do not support Samba in AD mode, the affected code is shipped with the libldb package. This flaw allows an authenticated user to possibly trigger a use-after-free or NULL pointer dereference. The highest threat from this vulnerability is to system availability.
Other sources
As per upstream advisory:
Samba has, since Samba 4.5, supported the VLV Active Directory LDAP feature, to allow clients to obtain 'virtual list views' of search results against a Samba AD DC using an LDAP control.
The combination of this control, and the ASQ control combines to allow an authenticated user to trigger a NULL-pointer de-reference. It is also possible to trigger a use-after-free, both as the code is very similar to that addressed by CVE-2020-10700 and due to the way errors are handled in the dsdbpagedresults module since Samba 4.10.
— Red Hat
Affected Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is the vulnerability ID for this vulnerability?
The vulnerability ID for this vulnerability is CVE-2020-10730.
What is the severity of CVE-2020-10730?
The severity of CVE-2020-10730 is medium with a severity value of 6.5.
Which versions of Samba are affected by CVE-2020-10730?
Versions before 4.10.17, before 4.11.11, and before 4.12.4 of Samba are affected by CVE-2020-10730.
Which operating systems are affected by CVE-2020-10730?
Operating systems such as Red Hat Enterprise Linux, Ubuntu, openSUSE Leap, Fedora, and Debian Debian Linux are affected by CVE-2020-10730.
Where can I find more information about CVE-2020-10730?
You can find more information about CVE-2020-10730 at the following references: [Link 1](http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00030.html), [Link 2](http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00054.html), [Link 3](http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00000.html).