CVE-2019-12435
published 2019-06-19CVE-2019-12435: Samba 4.9.x before 4.9.9 and 4.10.x before 4.10.5 has a NULL pointer dereference, leading to Denial of Service. This is related to the AD DC DNS management…
PriorityP431medium6.5CVSS 3.0
AVNACLPRLUINSUCNINAH
EPSS
2.18%
80.5th percentile
Samba 4.9.x before 4.9.9 and 4.10.x before 4.10.5 has a NULL pointer dereference, leading to Denial of Service. This is related to the AD DC DNS management server (dnsserver) RPC server process.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | samba | < samba 2:4.9.5+dfsg-5 (bookworm) | samba 2:4.9.5+dfsg-5 (bookworm) |
| samba | samba | >= 0 < 2:4.9.5+dfsg-5 | 2:4.9.5+dfsg-5 |
| samba | samba | >= 0 < 2:4.9.5+dfsg-5 | 2:4.9.5+dfsg-5 |
| samba | samba | >= 0 < 2:4.9.5+dfsg-5 | 2:4.9.5+dfsg-5 |
| samba | samba | >= 0 < 2:4.9.5+dfsg-5 | 2:4.9.5+dfsg-5 |
| samba | samba | >= 4.10.0 < 4.10.5 | 4.10.5 |
| samba | samba | >= 4.9.0 < 4.9.9 | 4.9.9 |
CVSS provenance
nvdv3.06.5MEDIUMCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
nvdv2.04.0MEDIUMAV:N/AC:L/Au:S/C:N/I:N/A:P
osv6.5MEDIUM
vendor_debian6.5MEDIUM
vendor_redhat6.5MEDIUM
vendor_ubuntu6.5MEDIUM
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GHSA
GHSA-8gjg-6f8w-gvhc: Samba 4
ghsa_unreviewed·2022-05-24
CVE-2019-12435 [MEDIUM] GHSA-8gjg-6f8w-gvhc: Samba 4
Samba 4.9.x before 4.9.9 and 4.10.x before 4.10.5 has a NULL pointer dereference, leading to Denial of Service. This is related to the AD DC DNS management server (dnsserver) RPC server process.
OSV
CVE-2019-12435: Samba 4
osv·2019-06-19·CVSS 6.5
CVE-2019-12435 [MEDIUM] CVE-2019-12435: Samba 4
Samba 4.9.x before 4.9.9 and 4.10.x before 4.10.5 has a NULL pointer dereference, leading to Denial of Service. This is related to the AD DC DNS management server (dnsserver) RPC server process.
Ubuntu
Samba vulnerabilities
vendor_ubuntu·2019-06-19·CVSS 6.5
CVE-2019-12435 [MEDIUM] Samba vulnerabilities
Title: Samba vulnerabilities
Summary: Samba could be made to crash if it received specially crafted network
traffic.
It was discovered that Samba incorrectly handled certain RPC messages. A
remote attacker could possibly use this issue to cause Samba to crash,
resulting in a denial of service. (CVE-2019-12435)
It was discovered that Samba incorrectly handled LDAP pages searches. A
remote attacker could possibly use this issue to cause Samba to crash,
resulting in a denial of service. (CVE-2019-12436)
Instructions: In general, a standard system update will make all the necessary changes.
Red Hat
samba: AD DC Denial of Service in DNS management server
vendor_redhat·2019-06-19·CVSS 6.5
CVE-2019-12435 [MEDIUM] CWE-476 samba: AD DC Denial of Service in DNS management server
samba: AD DC Denial of Service in DNS management server
Samba 4.9.x before 4.9.9 and 4.10.x before 4.10.5 has a NULL pointer dereference, leading to Denial of Service. This is related to the AD DC DNS management server (dnsserver) RPC server process.
Statement: This issue did not affect the version of samba as shipped with 'Red Hat Gluster Storage 3' as they did not include support for Active Directory Domain Controller.
Mitigation: The dnsserver task can be stopped by setting
'dcerpc endpoint servers = -dnsserver'
in the smb.conf and restarting Samba.
Package: samba (Red Hat Enterprise Linux 5) - Not affected
Package: samba (Red Hat Enterprise Linux 6) - Not affected
Package: samba4 (Red Hat Enterprise Linux 6) - Not affected
Package: samba (Red Hat Enterprise Linux 7) - Not affect
Debian
CVE-2019-12435: samba - Samba 4.9.x before 4.9.9 and 4.10.x before 4.10.5 has a NULL pointer dereference...
vendor_debian·2019·CVSS 6.5
CVE-2019-12435 [MEDIUM] CVE-2019-12435: samba - Samba 4.9.x before 4.9.9 and 4.10.x before 4.10.5 has a NULL pointer dereference...
Samba 4.9.x before 4.9.9 and 4.10.x before 4.10.5 has a NULL pointer dereference, leading to Denial of Service. This is related to the AD DC DNS management server (dnsserver) RPC server process.
Scope: local
bookworm: resolved (fixed in 2:4.9.5+dfsg-5)
bullseye: resolved (fixed in 2:4.9.5+dfsg-5)
forky: resolved (fixed in 2:4.9.5+dfsg-5)
sid: resolved (fixed in 2:4.9.5+dfsg-5)
trixie: resolved (fixed in 2:4.9.5+dfsg-5)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2019-12435 samba: AD DC Denial of Service in DNS management server [fedora-all]
bugzilla·2019-06-19·CVSS 6.5
CVE-2019-12435 [MEDIUM] CVE-2019-12435 samba: AD DC Denial of Service in DNS management server [fedora-all]
CVE-2019-12435 samba: AD DC Denial of Service in DNS management server [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported ve
Bugzilla
CVE-2019-12435 samba: AD DC Denial of Service in DNS management server
bugzilla·2019-05-20·CVSS 6.5
CVE-2019-12435 [MEDIUM] CVE-2019-12435 samba: AD DC Denial of Service in DNS management server
CVE-2019-12435 samba: AD DC Denial of Service in DNS management server
As per upstream advisory:
The dnsserver RPC pipe provides administrative facilities to modify DNS records and zones which allows an authenticated user to crash the RPC server process via a NULL pointer de-reference. This issue affects Samba 4.0 and later.
There is no further vulnerability associated with this issue, merely a denial of service.
Discussion:
Acknowledgments:
Name: The samba project
---
Mitigation:
The dnsserver task can be stopped by setting
'dcerpc endpoint servers = -dnsserver'
in the smb.conf and restarting Samba.
---
Upstream bug: https://bugzilla.samba.org/show_bug.cgi?id=13922
---
External References:
https://www.samba.org/samba/security/CVE-2019-12435.html
---
Created samba tracking
http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00023.htmlhttp://www.securityfocus.com/bid/108825https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QSG3TLPZP35RH5DWAIDC7MHXRK5DFKOE/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZQ3LCJNJ3ONHIRKDSKOTT6QGXALLCHVG/https://usn.ubuntu.com/4018-1/https://www.samba.org/samba/security/CVE-2019-12435.htmlhttps://www.synology.com/security/advisory/Synology_SA_19_27http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00023.htmlhttp://www.securityfocus.com/bid/108825https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QSG3TLPZP35RH5DWAIDC7MHXRK5DFKOE/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZQ3LCJNJ3ONHIRKDSKOTT6QGXALLCHVG/https://usn.ubuntu.com/4018-1/https://www.samba.org/samba/security/CVE-2019-12435.htmlhttps://www.synology.com/security/advisory/Synology_SA_19_27
2019-06-19
Published