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Fencer Vulns
high 7.1

CVE-2023-51596 json

BlueZ Phone Book Access Profile Heap-based Buffer Overflow Remote Code Execution Vulnerability

published 2024-05-03 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-56308

cvss
7.1
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.5%
EPSS 1.5% chance of exploitation in 30 days, percentile 74%
public exploits
0
none known

Summary

BlueZ Phone Book Access Profile Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of BlueZ. User interaction is required to exploit this vulnerability in that the target must connect to a malicious Bluetooth device.

The specific flaw exists within the handling of the Phone Book Access profile. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-20939.

Patch / fix

  • bluez RHEL 9 5.72-2.el9
  • bluez-cups RHEL 9 5.72-2.el9
  • bluez-libs RHEL 9 5.72-2.el9
  • bluez-obexd RHEL 9 5.72-2.el9

red hat advisories RHSA-2024:9413

  • bluez AlmaLinux 9 5.72-2.el9
  • bluez-cups AlmaLinux 9 5.72-2.el9
  • bluez-libs AlmaLinux 9 5.72-2.el9
  • bluez-obexd AlmaLinux 9 5.72-2.el9

almalinux advisories ALSA-2024:9413

  • bluez Rocky Linux 9 5.72-2.el9

rocky linux advisories RLSA-2024:9413

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-51596 updated cvss 7.1

bluez: phone book access profile heap-based buffer overflow remote code execution vulnerability

  • Red Hat Enterprise Linux 6 bluez, bluez-alsa, bluez-cups, bluez-libs, bluez-compat, bluez-gstreamer Red Hat Enterprise Linux 7 bluez, bluez-cups, bluez-libs, bluez-hid2hci
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 bluez, bluez-cups, bluez-libs, bluez-obexd, bluez-hid2hci
    affected: no fix available
  • Red Hat CodeReady Linux Builder (v. 9) bluez 5.72-2.el9, bluez-cups 5.72-2.el9, bluez-libs 5.72-2.el9, bluez-obexd 5.72-2.el9 Red Hat Enterprise Linux AppStream (v. 9) bluez 5.72-2.el9, bluez-cups 5.72-2.el9, bluez-libs 5.72-2.el9, bluez-obexd 5.72-2.el9 Red Hat Enterprise Linux BaseOS (v. 9) bluez 5.72-2.el9, bluez-cups 5.72-2.el9, bluez-libs 5.72-2.el9, bluez-obexd 5.72-2.el9
    fixed: vendor fix RHSA-2024:9413
  • Red Hat Enterprise Linux 10 bluez, bluez-cups, bluez-libs, bluez-obexd
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
2 y ago

Exploit prediction

1.51% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 7.1 CVSS:3.0/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

  • BlueZ BlueZ

Classification

Weakness
  • CWE-122 Heap-based Buffer Overflow

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.