high
7.5
CWE
835
Advisory Published
CVE Published
CVE Published
Updated

CVE-2023-34966: Samba: infinite loop in mdssvc rpc service for spotlight

First published: Thu Jul 13 2023(Updated: )

An infinite loop vulnerability was found in Samba's mdssvc RPC service for Spotlight. When parsing Spotlight mdssvc RPC packets sent by the client, the core unmarshalling function sl_unpack_loop() did not validate a field in the network packet that contains the count of elements in an array-like structure. By passing 0 as the count value, the attacked function will run in an endless loop consuming 100% CPU. This flaw allows an attacker to issue a malformed RPC request, triggering an infinite loop, resulting in a denial of service condition.

Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/samba<4.16.11
4.16.11
redhat/samba<4.17.10
4.17.10
redhat/samba<4.18.5
4.18.5
ubuntu/samba<2:4.15.13+dfsg-0ubuntu0.20.04.3
2:4.15.13+dfsg-0ubuntu0.20.04.3
ubuntu/samba<2:4.15.13+dfsg-0ubuntu1.2
2:4.15.13+dfsg-0ubuntu1.2
ubuntu/samba<2:4.16.8+dfsg-0ubuntu1.2
2:4.16.8+dfsg-0ubuntu1.2
ubuntu/samba<2:4.17.7+dfsg-1ubuntu1.1
2:4.17.7+dfsg-1ubuntu1.1
ubuntu/samba<2:4.18.5+dfsg-1ubuntu1
2:4.18.5+dfsg-1ubuntu1
<4.16.11
>=4.17.0<4.17.10
>=4.18.0<4.18.5
=37
=38
=8.0
=9.0
=11.0
=12.0
Samba Samba<4.16.11
Samba Samba>=4.17.0<4.17.10
Samba Samba>=4.18.0<4.18.5
Fedoraproject Fedora=38
Redhat Enterprise Linux=8.0
Redhat Enterprise Linux=9.0
debian/samba<=2:4.9.5+dfsg-5+deb10u3<=2:4.9.5+dfsg-5+deb10u4<=2:4.13.13+dfsg-1~deb11u5
2:4.17.12+dfsg-0+deb12u1
2:4.19.3+dfsg-2

Remedy

As a possible workaround, disable Spotlight by removing all configuration stanzas ("spotlight=yes|true") that enable Spotlight .

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2023-34966?

    CVE-2023-34966 is an infinite loop vulnerability found in Samba's mdssvc RPC service for Spotlight.

  • How severe is CVE-2023-34966?

    CVE-2023-34966 has a severity level of high.

  • What software is affected by CVE-2023-34966?

    Samba versions up to and including 4.18.5 are affected by CVE-2023-34966.

  • How can I fix CVE-2023-34966?

    To fix CVE-2023-34966, update your Samba software to version 4.18.6 or higher.

  • Where can I find more information about CVE-2023-34966?

    You can find more information about CVE-2023-34966 on the Red Hat Security Advisory, Samba website, and Bugzilla.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2024 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203