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

7.5HIGH

Key Information:

Vendor
Red Hat
Status
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 8.6 Extended Update Support
Red Hat Enterprise Linux 8.8 Extended Update Support
Red Hat Enterprise Linux 9
Vendor
CVE Published:
20 July 2023

Summary

An infinite loop vulnerability exists in Samba's mdssvc RPC service when processing Spotlight RPC packets. The unmarshalling function sl_unpack_loop() fails to validate the count of elements in the incoming packet. An attacker can exploit this by sending a crafted request with a count value of zero, causing the system to enter an infinite loop. This results in 100% CPU utilization, effectively leading to a denial of service. System administrators are advised to implement the latest updates to mitigate this issue.

Affected Version(s)

Red Hat Enterprise Linux 8 0:4.18.6-1.el8

Red Hat Enterprise Linux 8 0:4.18.6-1.el8

Red Hat Enterprise Linux 8.6 Extended Update Support 0:4.15.5-15.el8_6

References

https://access.redhat.com/errata/RHSA-2023:6667
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2023:7139
vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2024:0423
vendor-advisoryx_refsource_REDHAT

EPSS Score

13% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.