NULL pointer dereference in Samba
CVE-2020-14323
A null pointer dereference flaw was found in samba's Winbind service in versions before 4.11.15, before 4.12.9 and before 4.13.1. A local user could use this flaw to crash the winbind service causing denial of service.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (47.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 47.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Samba
- Debian Linux — versions 9.0
- Fedoraproject Fedora — versions 32, 33
- openSUSE Leap — versions 15.1, 15.2
- Samba — versions All samba versions before 4.11.15, before 4.12.9 and before 4.13.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- www.samba.org/samba/security/CVE-2020-14323.html (Vendor Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-11/msg00008.html (vendor-advisory, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-11/msg00012.html (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.netapp.com/advisory/ntap-20201103-0001/ (Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.debian.org/debian-lts-announce/2020/11/msg00041.html (mailing-list, Mailing List, Third Party Advisory)
- security.gentoo.org/glsa/202012-24 (vendor-advisory, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2024/04/msg00015.html (mailing-list)
Frequently asked questions
- What is CVE-2020-14323?
- CVE-2020-14323 is a medium-severity vulnerability in Samba, classified under Improper Null Termination. CVSS score: 5.5/10. Published 2020-10-29.
- How severe is CVE-2020-14323?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2020-14323 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.