Double Free in Bluez
CVE-2020-27153
In BlueZ before 5.55, a double free was found in the gatttool disconnect_cb() routine from shared/att.c. A remote attacker could potentially cause a denial of service or code execution, during service discovery, due to a redundant disconnect MGMT event.
Vulnerability class: Double Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H.
EPSS exploit prediction
EPSS: 0.043 (90.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 91st percentile — 90.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.042 · newest: 0.043 · change: +0.001
Affected products
- Bluez
- Debian Linux — versions 9.0, 10.0
- openSUSE Leap — versions 15.1, 15.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/bluez/bluez/commit/5a180f2ec9edfacafd95e5fed20d36fe8e077f07 (Patch, Third Party Advisory)
- github.com/bluez/bluez/commit/1cd644db8c23a2f530ddb93cebed7dacc5f5721a (Patch, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- lists.debian.org/debian-lts-announce/2020/10/msg00022.html (mailing-list, Mailing List, Third Party Advisory)
- security.gentoo.org/glsa/202011-01 (vendor-advisory, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-11/msg00034.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-11/msg00036.html (vendor-advisory, Mailing List, Third Party Advisory)
- www.debian.org/security/2021/dsa-4951 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-27153?
- CVE-2020-27153 is a high-severity vulnerability in Bluez, classified under Double Free. CVSS score: 8.6/10. Published 2020-10-15.
- How severe is CVE-2020-27153?
- High severity. CVSS v3 base score is 8.6 out of 10.
- Is CVE-2020-27153 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.