CVE-2019-12436
Samba 4.10.x before 4.10.5 has a NULL pointer dereference, leading to an AD DC LDAP server Denial...
Samba 4.10.x before 4.10.5 has a NULL pointer dereference, leading to an AD DC LDAP server Denial of Service. This is related to an attacker using the paged search control. The attacker must have directory read access in order to attempt an exploit.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
6.5
Samba 4.10.x before 4.10.5 has a NULL pointer dereference, leading to an AD DC LDAP server Denial of Service. This is related to an attacker using the paged search control. The attacker must have directory read access in order to attempt an exploit.
- Record
CVE-2019-12436- CVSS 3.0
- 6.5 Medium
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - CVSS 2.0
- 4.0 Medium
AV:N/AC:L/Au:S/C:N/I:N/A:P - Weakness
- CWE-476
- Updated
- 2026-11-02
CVE List No score
Samba 4.10.x before 4.10.5 has a NULL pointer dereference, leading to an AD DC LDAP server Denial of Service. This is related to an attacker using the paged search control. The attacker must have directory read access in order to attempt an exploit.
- Record
CVE-2019-12436- Updated
- 2026-11-02
EUVDEUVD-2019-4046 No score
Samba 4.10.x before 4.10.5 has a NULL pointer dereference, leading to an AD DC LDAP server Denial of Service. This is related to an attacker using the paged search control. The attacker must have directory read access in order to attempt an exploit.
- Record
EUVD-2019-4046- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-8c68-g8rx-85g8 No score
Samba 4.10.x before 4.10.5 has a NULL pointer dereference, leading to an AD DC LDAP server Denial...
Samba 4.10.x before 4.10.5 has a NULL pointer dereference, leading to an AD DC LDAP server Denial of Service. This is related to an attacker using the paged search control. The attacker must have directory read access in order to attempt an exploit.
- Record
GHSA-8c68-g8rx-85g8- Updated
- 2026-11-02
OSVALPINE-CVE-2019-12436
6.5
Samba 4.10.x before 4.10.5 has a NULL pointer dereference, leading to an AD DC LDAP server Denial of Service. This is related to an attacker using the paged search control. The attacker must have directory read access in order to attempt an exploit.
- Record
ALPINE-CVE-2019-12436- CVSS 3.0
- 6.5 Medium
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSV
6.5
Samba 4.10.x before 4.10.5 has a NULL pointer dereference, leading to an AD DC LDAP server Denial of Service. This is related to an attacker using the paged search control. The attacker must have directory read access in order to attempt an exploit.
- Record
CVE-2019-12436- CVSS 3.0
- 6.5 Medium
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2019-12436
6.5
Samba 4.10.x before 4.10.5 has a NULL pointer dereference, leading to an AD DC LDAP server Denial of Service. This is related to an attacker using the paged search control. The attacker must have directory read access in order to attempt an exploit.
- Record
UBUNTU-CVE-2019-12436- CVSS 3.0
- 6.5 Medium
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVMGASA-2019-0286 No score
Updated samba packages fix security vulnerabilities
Updated samba packages fix security vulnerabilities:
A combination of parameters and permissions in smb.conf can allow user to escape from the share path definition (CVE-2019-10197).
An authenticated user can crash the Samba AD DC's RPC server process via a NULL pointer dereference (CVE-2019-12435)
An user with read access to the directory can cause a NULL pointer dereference using the paged search control (CVE-2019-12436).
For other fixes in this update, see the referenced changelogs.
- Record
MGASA-2019-0286- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:11365-1 No score
ctdb-4.14.6+git.182.2205d5224e3-1.1 on GA media
These are all security issues fixed in the ctdb-4.14.6+git.182.2205d5224e3-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:11365-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
sambaAlpine:v3.10 |
4.10.0 up to 4.10.5-r0 | 4.10.5-r0 |
sambaAlpine:v3.11 |
4.10.0 up to 4.10.5-r0 | 4.10.5-r0 |
sambaAlpine:v3.12 |
4.10.0 up to 4.10.5-r0 | 4.10.5-r0 |
sambaAlpine:v3.13 |
4.10.0 up to 4.10.5-r0 | 4.10.5-r0 |
sambaAlpine:v3.14 |
4.10.0 up to 4.10.5-r0 | 4.10.5-r0 |
sambaAlpine:v3.15 |
4.10.0 up to 4.10.5-r0 | 4.10.5-r0 |
sambaAlpine:v3.16 |
4.10.0 up to 4.10.5-r0 | 4.10.5-r0 |
sambaAlpine:v3.17 |
4.10.0 up to 4.10.5-r0 | 4.10.5-r0 |
sambaAlpine:v3.18 |
4.10.0 up to 4.10.5-r0 | 4.10.5-r0 |
sambaAlpine:v3.19 |
4.10.0 up to 4.10.5-r0 | 4.10.5-r0 |
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| Package | Affected | Fixed |
|---|---|---|
sambaAlpine:v3.20 |
4.10.0 up to 4.10.5-r0 | 4.10.5-r0 |
sambaAlpine:v3.21 |
4.10.0 up to 4.10.5-r0 | 4.10.5-r0 |
sambaAlpine:v3.22 |
4.10.0 up to 4.10.5-r0 | 4.10.5-r0 |
sambaAlpine:v3.23 |
4.10.0 up to 4.10.5-r0 | 4.10.5-r0 |
sambaAlpine:v3.24 |
4.10.0 up to 4.10.5-r0 | 4.10.5-r0 |
sambaMageia:7 From an advisory covering 3 CVEs |
before 4.10.8-3.mga7 | 4.10.8-3.mga7 |
ldbMageia:7 From an advisory covering 3 CVEs |
before 1.5.5-1.mga7 | 1.5.5-1.mga7 |
sambaopenSUSE:Tumbleweed From an advisory covering 66 CVEs |
before 4.14.6+git.182.2205d5224e3-1.1 | 4.14.6+git.182.2205d5224e3-1.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| affected | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2019-12436 is a medium vulnerability (CVSS 6.5) in Samba, published June 19, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.79%, the 86th percentile. Fixed in samba 4.10.5-r0.
References
samba.org/samba/security/CVE-2019-12436.html
usn.ubuntu.com/4018-1
securityfocus.com/bid/108823
synology.com/security/advisory/Synology_SA_19_27
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZQ3LCJNJ3ONHIRKDSKOTT6QGXALLCHVG
nvd.nist.gov/vuln/detail/CVE-2019-12436
Show 79 moreShow less
github.com/advisories/GHSA-8c68-g8rx-85g8
security.alpinelinux.org/vuln/CVE-2019-12436
advisories.mageia.org/MGASA-2019-0286.html
bugs.mageia.org/show_bug.cgi?id=24980
samba.org/samba/history/samba-4.10.5.html
samba.org/samba/history/samba-4.10.6.html
samba.org/samba/history/samba-4.10.7.html
samba.org/samba/history/samba-4.10.8.html
samba.org/samba/security/CVE-2019-12435.html
samba.org/samba/security/CVE-2019-10197.html
ubuntu.com/security/CVE-2019-12436
ubuntu.com/security/notices/USN-4018-1
cve.org/CVERecord?id=CVE-2019-12436
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