CVE-2020-10730 Null dereference in Samba
Medium 6.5
Published
Updated
Check this codebase for CVE-2020-10730 and fix it if it is affected.
What it is: CVE-2020-10730 is a medium-severity vulnerability in Debian Debian Linux, published on 7 Jul 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2020-10730 in the wild and no public exploit code.
Affected product: Debian Debian Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2020-10730/ (Markdown: https://insights.sbomify.com/CVE-2020-10730/index.md)
An authenticated user can trigger a NULL pointer dereference or use-after-free in Samba AD LDAP, causing a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-10730?
CVE-2020-10730 is a medium-severity vulnerability in Debian Debian Linux, published on 7 Jul 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2020-10730?
It affects 5 products.
Linux distribution packages (40)
ldb-tools Red Hat:enterprise_linux:8::baseos | All versions | 0:2.1.3-2.el8 |
ldb-tools-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:2.1.3-2.el8 |
libldb Red Hat:enterprise_linux:8::baseos | All versions | 0:2.1.3-2.el8 |
libldb-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:2.1.3-2.el8 |
libldb-debugsource Red Hat:enterprise_linux:8::baseos | All versions | 0:2.1.3-2.el8 |
libldb-devel Red Hat:enterprise_linux:8::baseos | All versions | 0:2.1.3-2.el8 |
python3-ldb Red Hat:enterprise_linux:8::baseos | All versions | 0:2.1.3-2.el8 |
python3-ldb-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 0:2.1.3-2.el8 |
ctdb Red Hat:storage:3.5:samba:el7 | All versions | 0:4.11.6-107.el7rhgs |
libsmbclient Red Hat:storage:3.5:samba:el7 | All versions | 0:4.11.6-107.el7rhgs |
libsmbclient-devel Red Hat:storage:3.5:samba:el7 | All versions | 0:4.11.6-107.el7rhgs |
libwbclient Red Hat:storage:3.5:samba:el7 | All versions | 0:4.11.6-107.el7rhgs |
libwbclient-devel Red Hat:storage:3.5:samba:el7 | All versions | 0:4.11.6-107.el7rhgs |
python3-samba Red Hat:storage:3.5:samba:el7 | All versions | 0:4.11.6-107.el7rhgs |
samba Red Hat:storage:3.5:samba:el7 | All versions | 0:4.11.6-107.el7rhgs |
samba-client Red Hat:storage:3.5:samba:el7 | All versions | 0:4.11.6-107.el7rhgs |
samba-client-libs Red Hat:storage:3.5:samba:el7 | All versions | 0:4.11.6-107.el7rhgs |
samba-common Red Hat:storage:3.5:samba:el7 | All versions | 0:4.11.6-107.el7rhgs |
samba-common-libs Red Hat:storage:3.5:samba:el7 | All versions | 0:4.11.6-107.el7rhgs |
samba-common-tools Red Hat:storage:3.5:samba:el7 | All versions | 0:4.11.6-107.el7rhgs |
samba-debuginfo Red Hat:storage:3.5:samba:el7 | All versions | 0:4.11.6-107.el7rhgs |
samba-devel Red Hat:storage:3.5:samba:el7 | All versions | 0:4.11.6-107.el7rhgs |
samba-krb5-printing Red Hat:storage:3.5:samba:el7 | All versions | 0:4.11.6-107.el7rhgs |
samba-libs Red Hat:storage:3.5:samba:el7 | All versions | 0:4.11.6-107.el7rhgs |
samba-pidl Red Hat:storage:3.5:samba:el7 | All versions | 0:4.11.6-107.el7rhgs |
samba-vfs-glusterfs Red Hat:storage:3.5:samba:el7 | All versions | 0:4.11.6-107.el7rhgs |
samba-winbind Red Hat:storage:3.5:samba:el7 | All versions | 0:4.11.6-107.el7rhgs |
samba-winbind-clients Red Hat:storage:3.5:samba:el7 | All versions | 0:4.11.6-107.el7rhgs |
samba-winbind-krb5-locator Red Hat:storage:3.5:samba:el7 | All versions | 0:4.11.6-107.el7rhgs |
samba-winbind-modules Red Hat:storage:3.5:samba:el7 | All versions | 0:4.11.6-107.el7rhgs |
ctdb Red Hat:storage:3.5:samba:el8 | All versions | 0:4.11.6-107.el8rhgs |
ctdb-debuginfo Red Hat:storage:3.5:samba:el8 | All versions | 0:4.11.6-107.el8rhgs |
ctdb-tests-debuginfo Red Hat:storage:3.5:samba:el8 | All versions | 0:4.11.6-107.el8rhgs |
libsmbclient Red Hat:storage:3.5:samba:el8 | All versions | 0:4.11.6-107.el8rhgs |
libsmbclient-debuginfo Red Hat:storage:3.5:samba:el8 | All versions | 0:4.11.6-107.el8rhgs |
libsmbclient-devel Red Hat:storage:3.5:samba:el8 | All versions | 0:4.11.6-107.el8rhgs |
libwbclient Red Hat:storage:3.5:samba:el8 | All versions | 0:4.11.6-107.el8rhgs |
libwbclient-debuginfo Red Hat:storage:3.5:samba:el8 | All versions | 0:4.11.6-107.el8rhgs |
libwbclient-devel Red Hat:storage:3.5:samba:el8 | All versions | 0:4.11.6-107.el8rhgs |
python3-samba Red Hat:storage:3.5:samba:el8 | All versions | 0:4.11.6-107.el8rhgs |
Products include Debian Debian Linux, Fedoraproject Fedora, Opensuse Leap, Redhat Storage, Samba Samba.
How do I fix CVE-2020-10730?
Upgrade to a fixed version.
Is CVE-2020-10730 being exploited?
There is no known exploitation of CVE-2020-10730 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as ALPINE-CVE-2020-10730, DEBIAN-CVE-2020-10730, ECHO-439c-0aa3-d718, GHSA-c9v6-jmq4-q762, RHSA-2020:3118, RHSA-2020:3119 and 4 more.