CVE-2019-8921

MEDIUM EPSS 56.4%
Published Nov 29, 20214y ago · Modified Jun 17, 20262w ago
6.5 CVSS 3.1
Medium
Find Similar
Published Nov 29, 2021 4y ago
Last Modified Jun 17, 2026 2w ago

Description

An issue was discovered in bluetoothd in BlueZ through 5.48. The vulnerability lies in the handling of a SVC_ATTR_REQ by the SDP implementation. By crafting a malicious CSTATE, it is possible to trick the server into returning more bytes than the buffer actually holds, resulting in leaking arbitrary heap data. The root cause can be found in the function service_attr_req of sdpd-request.c. The server does not check whether the CSTATE data is the same in consecutive requests, and instead simply trusts that it is the same.

CVSS Details

Base Score
6.5
Exploitability
2.8
Impact
3.6
Vector string
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Adjacent
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
56.4% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-345

Affected Products 3

VendorProductVersionRange
bluezbluez* ≤5.48
linuxlinux_kernel*any
debiandebian_linux10.0any

References 3

  • lists.debian.org https://lists.debian.org/debian-lts-announce/2022/10/msg00026.html
    Mailing ListThird Party Advisory
  • security.netapp.com https://security.netapp.com/advisory/ntap-20211203-0002/
    Third Party Advisory
  • ssd-disclosure.com https://ssd-disclosure.com/ssd-advisory-linux-bluez-information-leak-and-heap-overflow/
    ExploitPatchThird Party Advisory

Remediation

  • ssd-disclosure.com https://ssd-disclosure.com/ssd-advisory-linux-bluez-information-leak-and-heap-overflow/
    ExploitPatchThird Party Advisory