NULL pointer dereference in Samba - CVE-2020-10730

CSH
CYBERSECURITY HELP
Sign In REGISTER
 
Main Vulnerability Database Vulnerabilities #VU29483

NULL pointer dereference in Samba - CVE-2020-10730

Published: July 2, 2020 / Updated: July 15, 2020


Vulnerability identifier: #VU29483
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-10730
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in Samba AD DC LDAP Server with ASQ, VLV and paged_results. A remote authenticated user can pass specially crafted data to the application and perform a denial of service (DoS) attack by triggering a NULL pointer dereference or us-after-free error.


Affected software

Samba
Gentoo Linux
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Ubuntu
Opensuse
openEuler
Fedora
samba (Alpine package)
samba (Red Hat package)
ldb (Debian package)
libldb
libldb (Red Hat package)
samba (Ubuntu package)
samba-debugsource
samba-dc-provision
samba-devel
samba-help
samba-krb5-printing
samba-libs
samba-pidl
samba-test
samba-winbind
samba-winbind-clients
samba-winbind-krb5-locator
samba-winbind-modules
python3-samba-dc
samba
ctdb
ctdb-tests
libsmbclient
libsmbclient-devel
libwbclient
libwbclient-devel
python3-samba
python3-samba-test
samba-client
samba-common
samba-common-tools
samba-dc
samba-dc-bind-dlz
samba-debuginfo

How to mitigate CVE-2020-10730

Install updates from vendor's website.

Samba - addressed in versions 4.10.17, 4.11.11, 4.12.4
samba (Alpine package) - update to 4.12.5-r0
samba (Red Hat package) - addressed in versions 4.11.6-107.el7rhgs, 4.11.6-107.el8rhgs
ldb (Debian package) - update to 2:1.5.1+really1.4.6-3+deb10u1
libldb - addressed in versions 2.0.12-1.fc31, 2.1.4-1.fc32
libldb (Red Hat package) - update to 2.1.3-2.el8
samba (Ubuntu package) - addressed in versions 2:3.6.25-0ubuntu0.12.04.20, 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7, 2:4.3.11+dfsg-0ubuntu0.16.04.28, 2:4.7.6+dfsg~ubuntu-0ubuntu2.17, 2:4.10.7+dfsg-0ubuntu2.6, 2:4.11.6+dfsg-0ubuntu1.3
samba-debugsource - update to 4.11.6-8
samba-dc-provision - update to 4.11.6-8
samba-devel - update to 4.11.6-8
samba-help - update to 4.11.6-8
samba-krb5-printing - update to 4.11.6-8
samba-libs - update to 4.11.6-8
samba-pidl - update to 4.11.6-8
samba-test - update to 4.11.6-8
samba-winbind - update to 4.11.6-8
samba-winbind-clients - update to 4.11.6-8
samba-winbind-krb5-locator - update to 4.11.6-8
samba-winbind-modules - update to 4.11.6-8
python3-samba-dc - update to 4.11.6-8
samba - update to 4.11.6-8
ctdb - update to 4.11.6-8
ctdb-tests - update to 4.11.6-8
libsmbclient - update to 4.11.6-8
libsmbclient-devel - update to 4.11.6-8
libwbclient - update to 4.11.6-8
libwbclient-devel - update to 4.11.6-8
python3-samba - update to 4.11.6-8
python3-samba-test - update to 4.11.6-8
samba-client - update to 4.11.6-8
samba-common - update to 4.11.6-8
samba-common-tools - update to 4.11.6-8
samba-dc - update to 4.11.6-8
samba-dc-bind-dlz - update to 4.11.6-8
samba-debuginfo - update to 4.11.6-8
samba - addressed in versions 4.11.11-0.fc31, 4.12.5-0.fc32

External References

Related Security Bulletins