CVE-2018-10918
published 2018-08-22CVE-2018-10918: A null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer. An authenticated attacker could use this flaw…
PriorityP334medium6.5CVSS 3.0
AVNACLPRLUINSUCNINAH
EPSS
2.55%
83.4th percentile
A null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer. An authenticated attacker could use this flaw to crash a samba server in an Active Directory Domain Controller configuration. Samba versions before 4.7.9 and 4.8.4 are vulnerable.
Affected
15 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| debian | samba | < samba 2:4.8.4+dfsg-1 (bookworm) | samba 2:4.8.4+dfsg-1 (bookworm) |
| samba | samba | >= 0 < 2:4.8.4+dfsg-1 | 2:4.8.4+dfsg-1 |
| samba | samba | >= 0 < 2:4.8.4+dfsg-1 | 2:4.8.4+dfsg-1 |
| samba | samba | >= 0 < 2:4.8.4+dfsg-1 | 2:4.8.4+dfsg-1 |
| samba | samba | >= 0 < 2:4.8.4+dfsg-1 | 2:4.8.4+dfsg-1 |
| samba | samba | >= 0 < 2:4.3.11+dfsg-0ubuntu0.14.04.16 | 2:4.3.11+dfsg-0ubuntu0.14.04.16 |
| samba | samba | >= 0 < 2:4.3.11+dfsg-0ubuntu0.16.04.15 | 2:4.3.11+dfsg-0ubuntu0.16.04.15 |
| samba | samba | >= 0 < 2:4.7.6+dfsg~ubuntu-0ubuntu2.2 | 2:4.7.6+dfsg~ubuntu-0ubuntu2.2 |
| samba | samba | >= 4.7.0 < 4.7.9 | 4.7.9 |
| samba | samba | >= 4.8.0 < 4.8.4 | 4.8.4 |
| the_samba_team | samba | — | — |
| the_samba_team | samba | — | — |
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
osv8.8HIGH
vendor_debian5.2MEDIUM
vendor_redhat5.2MEDIUM
vendor_ubuntu4.3MEDIUM
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Red Hat
samba: DsCrackNames on a user without an SPN can trigger NULL-pointer de-reference
vendor_redhat·2018-08-16·CVSS 5.2
CVE-2018-10918 [MEDIUM] CWE-476 samba: DsCrackNames on a user without an SPN can trigger NULL-pointer de-reference
samba: DsCrackNames on a user without an SPN can trigger NULL-pointer de-reference
A null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer. An authenticated attacker could use this flaw to crash a samba server in an Active Directory Domain Controller configuration. Samba versions before 4.7.9 and 4.8.4 are vulnerable.
A null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer. An authenticated attacker could use this flaw to crash a samba server in an Active Diretory Domain Controller configuration.
Package: samba (Red Hat Enterprise Linux 5) - Not affected
Package: samba3x (Red Hat Enterprise Linux 5) - Not affected
Package: samba (Red Hat Enterprise Linux 6) - Not affected
P
Ubuntu
Samba vulnerabilities
vendor_ubuntu·2018-08-14·CVSS 4.3
CVE-2018-10858 [MEDIUM] Samba vulnerabilities
Title: Samba vulnerabilities
Summary: Several security issues were fixed in Samba.
Svyatoslav Phirsov discovered that the Samba libsmbclient library
incorrectly handled extra long filenames. A malicious server could use this
issue to cause Samba to crash, resulting in a denial of service, or
possibly execute arbitrary code. (CVE-2018-10858)
Volker Mauel discovered that Samba incorrectly handled database output.
When used as an Active Directory Domain Controller, a remote authenticated
attacker could use this issue to cause Samba to crash, resulting in a
denial of service. This issue only affected Ubuntu 18.04 LTS.
(CVE-2018-10918)
Phillip Kuhrt discovered that the Samba LDAP server incorrectly handled
certain confidential attribute values. A remote authenticated attacker
could possibly
Debian
CVE-2018-10918: samba - A null pointer dereference flaw was found in the way samba checked database outp...
vendor_debian·2018·CVSS 5.2
CVE-2018-10918 [MEDIUM] CVE-2018-10918: samba - A null pointer dereference flaw was found in the way samba checked database outp...
A null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer. An authenticated attacker could use this flaw to crash a samba server in an Active Directory Domain Controller configuration. Samba versions before 4.7.9 and 4.8.4 are vulnerable.
Scope: local
bookworm: resolved (fixed in 2:4.8.4+dfsg-1)
bullseye: resolved (fixed in 2:4.8.4+dfsg-1)
forky: resolved (fixed in 2:4.8.4+dfsg-1)
sid: resolved (fixed in 2:4.8.4+dfsg-1)
trixie: resolved (fixed in 2:4.8.4+dfsg-1)
GHSA
GHSA-3gcv-q5vm-qrxr: A null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer
ghsa_unreviewed·2022-05-13
CVE-2018-10918 [MEDIUM] CWE-476 GHSA-3gcv-q5vm-qrxr: A null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer
A null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer. An authenticated attacker could use this flaw to crash a samba server in an Active Directory Domain Controller configuration. Samba versions before 4.7.9 and 4.8.4 are vulnerable.
OSV
CVE-2018-10918: A null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer
osv·2018-08-22·CVSS 6.5
CVE-2018-10918 [MEDIUM] CVE-2018-10918: A null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer
A null pointer dereference flaw was found in the way samba checked database outputs from the LDB database layer. An authenticated attacker could use this flaw to crash a samba server in an Active Directory Domain Controller configuration. Samba versions before 4.7.9 and 4.8.4 are vulnerable.
OSV
samba vulnerabilities
osv·2018-08-14·CVSS 8.8
CVE-2018-10858 [HIGH] samba vulnerabilities
samba vulnerabilities
Svyatoslav Phirsov discovered that the Samba libsmbclient library
incorrectly handled extra long filenames. A malicious server could use this
issue to cause Samba to crash, resulting in a denial of service, or
possibly execute arbitrary code. (CVE-2018-10858)
Volker Mauel discovered that Samba incorrectly handled database output.
When used as an Active Directory Domain Controller, a remote authenticated
attacker could use this issue to cause Samba to crash, resulting in a
denial of service. This issue only affected Ubuntu 18.04 LTS.
(CVE-2018-10918)
Phillip Kuhrt discovered that the Samba LDAP server incorrectly handled
certain confidential attribute values. A remote authenticated attacker
could possibly use this issue to obtain certain sensitive information.
(CVE-
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2018-10918 samba: DsCrackNames on a user without an SPN can trigger NULL-pointer de-reference [fedora-all]
bugzilla·2018-08-16·CVSS 5.2
CVE-2018-10918 [MEDIUM] CVE-2018-10918 samba: DsCrackNames on a user without an SPN can trigger NULL-pointer de-reference [fedora-all]
CVE-2018-10918 samba: DsCrackNames on a user without an SPN can trigger NULL-pointer de-reference [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 af
Bugzilla
CVE-2018-10918 samba: DsCrackNames on a user without an SPN can trigger NULL-pointer de-reference
bugzilla·2018-08-01·CVSS 5.2
CVE-2018-10918 [MEDIUM] CVE-2018-10918 samba: DsCrackNames on a user without an SPN can trigger NULL-pointer de-reference
CVE-2018-10918 samba: DsCrackNames on a user without an SPN can trigger NULL-pointer de-reference
As per upstream advisory:
All versions of Samba from 4.7.0 onwards are vulnerable to a denial of service attack which can crash the "samba" process when Samba is an Active Directory Domain Controller.
Missing database output checks on the returned directory attributes from the LDB database layer cause the DsCrackNames call in the DRSUAPI server to crash when following a NULL pointer.
This call is only available after authentication.
There is no further vulnerability associated with this error, merely a denial of service.
Discussion:
External Reference:
https://www.samba.org/samba/security/CVE-2018-10918.html
---
Created samba tracking bugs for this issue:
Affects: fedora-all [bug 16
http://www.securityfocus.com/bid/105083https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10918https://security.gentoo.org/glsa/202003-52https://security.netapp.com/advisory/ntap-20180814-0001/https://usn.ubuntu.com/3738-1/https://www.samba.org/samba/security/CVE-2018-10918.htmlhttp://www.securityfocus.com/bid/105083https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10918https://security.gentoo.org/glsa/202003-52https://security.netapp.com/advisory/ntap-20180814-0001/https://usn.ubuntu.com/3738-1/https://www.samba.org/samba/security/CVE-2018-10918.html
2018-08-22
Published