CVE-2020-10745
published 2020-07-07CVE-2020-10745: A flaw was found in all Samba versions before 4.10.17, before 4.11.11 and before 4.12.4 in the way it processed NetBios over TCP/IP. This flaw allows a remote…
PriorityP342high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
3.87%
89.1th percentile
A flaw was found in all Samba versions before 4.10.17, before 4.11.11 and before 4.12.4 in the way it processed NetBios over TCP/IP. This flaw allows a remote attacker could to cause the Samba server to consume excessive CPU use, resulting in a denial of service. This highest threat from this vulnerability is to system availability.
Affected
17 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | debian_linux | — | — |
| debian | samba | < samba 2:4.12.5+dfsg-1 (bookworm) | samba 2:4.12.5+dfsg-1 (bookworm) |
| fedoraproject | fedora | — | — |
| opensuse | leap | — | — |
| opensuse | leap | — | — |
| samba | samba | — | — |
| samba | samba | >= 0 < 2:4.12.5+dfsg-1 | 2:4.12.5+dfsg-1 |
| samba | samba | >= 0 < 2:4.12.5+dfsg-1 | 2:4.12.5+dfsg-1 |
| samba | samba | >= 0 < 2:4.12.5+dfsg-1 | 2:4.12.5+dfsg-1 |
| samba | samba | >= 0 < 2:4.12.5+dfsg-1 | 2:4.12.5+dfsg-1 |
| samba | samba | >= 0 < 2:4.3.11+dfsg-0ubuntu0.16.04.28 | 2:4.3.11+dfsg-0ubuntu0.16.04.28 |
| samba | samba | >= 0 < 2:4.7.6+dfsg~ubuntu-0ubuntu2.17 | 2:4.7.6+dfsg~ubuntu-0ubuntu2.17 |
| samba | samba | >= 0 < 2:4.11.6+dfsg-0ubuntu1.3 | 2:4.11.6+dfsg-0ubuntu1.3 |
| samba | samba | >= 0 < 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7 | 2:4.3.11+dfsg-0ubuntu0.14.04.20+esm7 |
| samba | samba | >= 4.0.0 < 4.10.17 | 4.10.17 |
| samba | samba | >= 4.11.0 < 4.11.11 | 4.11.11 |
| samba | samba | >= 4.12.0 < 4.12.4 | 4.12.4 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.07.8HIGHAV:N/AC:L/Au:N/C:N/I:N/A:C
osv7.5HIGH
vendor_debian7.5HIGH
vendor_redhat7.5HIGH
vendor_ubuntu6.5MEDIUM
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Red Hat
samba: Parsing and packing of NBT and DNS packets can consume excessive CPU
vendor_redhat·2020-07-02·CVSS 7.5
CVE-2020-10745 [HIGH] CWE-400 samba: Parsing and packing of NBT and DNS packets can consume excessive CPU
samba: Parsing and packing of NBT and DNS packets can consume excessive CPU
A flaw was found in all Samba versions before 4.10.17, before 4.11.11 and before 4.12.4 in the way it processed NetBios over TCP/IP. This flaw allows a remote attacker could to cause the Samba server to consume excessive CPU use, resulting in a denial of service. This highest threat from this vulnerability is to system availability.
A flaw was found in Samba in the way it processed NetBios over TCP/IP. This flaw allows a remote attacker could to cause the Samba server to consume excessive CPU use, resulting in a denial of service. This highest threat from this vulnerability is to system availability.
Statement: This flaw does not affect the version of samba shipped with Red Hat Enterprise Linux and Red Hat Glust
Ubuntu
Samba vulnerabilities
vendor_ubuntu·2020-07-02·CVSS 6.5
CVE-2020-10730 [MEDIUM] Samba vulnerabilities
Title: Samba vulnerabilities
Summary: Several security issues were fixed in Samba.
Andrew Bartlett discovered that Samba incorrectly handled certain LDAP queries.
A remote attacker could use this issue to cause Samba to crash, resulting
in a denial of service, or possibly execute arbitrary code. This issue only
affected Ubuntu 18.04 LTS, Ubuntu 19.10 and Ubuntu 20.04 LTS. (CVE-2020-10730)
Douglas Bagnall discovered that Samba incorrectly handled certain queries.
A remote attacker could possibly use this issue to cause a denial of service.
(CVE-2020-10745)
Andrei Popa discovered that Samba incorrectly handled certain LDAP queries.
A remote attacker could use this issue to cause Samba to crash, resulting
in a denial of service, or possibly execute arbitrary code. This issue only
affected
Debian
CVE-2020-10745: samba - A flaw was found in all Samba versions before 4.10.17, before 4.11.11 and before...
vendor_debian·2020·CVSS 7.5
CVE-2020-10745 [HIGH] CVE-2020-10745: samba - A flaw was found in all Samba versions before 4.10.17, before 4.11.11 and before...
A flaw was found in all Samba versions before 4.10.17, before 4.11.11 and before 4.12.4 in the way it processed NetBios over TCP/IP. This flaw allows a remote attacker could to cause the Samba server to consume excessive CPU use, resulting in a denial of service. This highest threat from this vulnerability is to system availability.
Scope: local
bookworm: resolved (fixed in 2:4.12.5+dfsg-1)
bullseye: resolved (fixed in 2:4.12.5+dfsg-1)
forky: resolved (fixed in 2:4.12.5+dfsg-1)
sid: resolved (fixed in 2:4.12.5+dfsg-1)
trixie: resolved (fixed in 2:4.12.5+dfsg-1)
GHSA
GHSA-77pj-5756-vfx3: A flaw was found in all Samba versions before 4
ghsa_unreviewed·2022-05-24
CVE-2020-10745 [HIGH] CWE-400 GHSA-77pj-5756-vfx3: A flaw was found in all Samba versions before 4
A flaw was found in all Samba versions before 4.10.17, before 4.11.11 and before 4.12.4 in the way it processed NetBios over TCP/IP. This flaw allows a remote attacker could to cause the Samba server to consume excessive CPU use, resulting in a denial of service. This highest threat from this vulnerability is to system availability.
OSV
CVE-2020-10745: A flaw was found in all Samba versions before 4
osv·2020-07-07·CVSS 7.5
CVE-2020-10745 [HIGH] CVE-2020-10745: A flaw was found in all Samba versions before 4
A flaw was found in all Samba versions before 4.10.17, before 4.11.11 and before 4.12.4 in the way it processed NetBios over TCP/IP. This flaw allows a remote attacker could to cause the Samba server to consume excessive CPU use, resulting in a denial of service. This highest threat from this vulnerability is to system availability.
OSV
samba vulnerabilities
osv·2020-07-02·CVSS 6.5
CVE-2020-10730 [MEDIUM] samba vulnerabilities
samba vulnerabilities
Andrew Bartlett discovered that Samba incorrectly handled certain LDAP queries.
A remote attacker could use this issue to cause Samba to crash, resulting
in a denial of service, or possibly execute arbitrary code. This issue only
affected Ubuntu 18.04 LTS, Ubuntu 19.10 and Ubuntu 20.04 LTS. (CVE-2020-10730)
Douglas Bagnall discovered that Samba incorrectly handled certain queries.
A remote attacker could possibly use this issue to cause a denial of service.
(CVE-2020-10745)
Andrei Popa discovered that Samba incorrectly handled certain LDAP queries.
A remote attacker could use this issue to cause Samba to crash, resulting
in a denial of service, or possibly execute arbitrary code. This issue only
affected Ubuntu 18.04 LTS, Ubuntu 19.10 and Ubuntu 20.04 LTS.
(CVE-202
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2020-10745 samba: Parsing and packing of NBT and DNS packets can consume excessive CPU [fedora-all]
bugzilla·2020-07-02·CVSS 7.5
CVE-2020-10745 [HIGH] CVE-2020-10745 samba: Parsing and packing of NBT and DNS packets can consume excessive CPU [fedora-all]
CVE-2020-10745 samba: Parsing and packing of NBT and DNS packets can consume excessive CPU [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 m
Bugzilla
CVE-2020-10745 samba: Parsing and packing of NBT and DNS packets can consume excessive CPU
bugzilla·2020-06-22·CVSS 7.5
CVE-2020-10745 [HIGH] CVE-2020-10745 samba: Parsing and packing of NBT and DNS packets can consume excessive CPU
CVE-2020-10745 samba: Parsing and packing of NBT and DNS packets can consume excessive CPU
As per upstream advisory:
The NetBIOS over TCP/IP name resolution protocol is framed using the same format as DNS, and Samba's packing code for both uses DNS name compression.
An attacker can choose a name which, when the name is included in the reply, causes the DNS name compression algorithm to walk a very long internal list while trying to compress the reply. This in in part because the traditional "." separator in DNS is not actually part of the DNS protocol, the limit of 128 components is exceeded by including "." inside the components.
Specifically, the longest label is 63 characters, and Samba enforces a limit of 128 components. That means you can make a query for the address with 127 comp
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00030.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00054.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-09/msg00002.htmlhttps://bugzilla.redhat.com/show_bug.cgi?id=1849491%3Bhttps://lists.debian.org/debian-lts-announce/2020/11/msg00041.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6YLNQ5GRXUKYRUAOFZ4DUBVN4SMTL6Q2/https://security.gentoo.org/glsa/202007-15https://www.samba.org/samba/security/CVE-2020-10745.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00030.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-07/msg00054.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-09/msg00002.htmlhttps://bugzilla.redhat.com/show_bug.cgi?id=1849491%3Bhttps://lists.debian.org/debian-lts-announce/2020/11/msg00041.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6YLNQ5GRXUKYRUAOFZ4DUBVN4SMTL6Q2/https://security.gentoo.org/glsa/202007-15https://www.samba.org/samba/security/CVE-2020-10745.html
2020-07-07
Published