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Ubuntu.comUB:CVE-2023-28464

HistoryMar 31, 2023 - 12:00 a.m.

CVE-2023-28464

2023-03-3100:00:00

ubuntu.com

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.3 High

AI Score

Confidence

High

4.3 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:L/Au:S/C:P/I:P/A:P

0.0004 Low

EPSS

Percentile

5.3%

JSON

hci_conn_cleanup in net/bluetooth/hci_conn.c in the Linux kernel through
6.2.9 has a use-after-free (observed in hci_conn_hash_flush) because of
calls to hci_dev_put and hci_conn_put. There is a double free that may lead
to privilege escalation.

Bugs

Notes

Author	Note
sbeattie	both the introducing commit 0f00cd322d22 (“Bluetooth: Free potentially unfreed SCO connection”) and the fixing commit 5dc7d23e167e (“Bluetooth: hci_conn: Fix possible UAF”) were pulled into the upstream stable v6.2.12 kernel, so 6.2.y kernel users were never affected by this issue. Upstream commit a85fb91e3d72 (“Bluetooth: Fix double free in hci_conn_cleanup”) (6.7-rc1) also claims to fix this CVE, not clear if this is a typo or was a followup fix, because the original was incomplete.

Author

Note

sbeattie

both the introducing commit 0f00cd322d22 (“Bluetooth: Free potentially unfreed SCO connection”) and the fixing commit 5dc7d23e167e (“Bluetooth: hci_conn: Fix possible UAF”) were pulled into the upstream stable v6.2.12 kernel, so 6.2.y kernel users were never affected by this issue. Upstream commit a85fb91e3d72 (“Bluetooth: Fix double free in hci_conn_cleanup”) (6.7-rc1) also claims to fix this CVE, not clear if this is a typo or was a followup fix, because the original was incomplete.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux-raspi-5.4< anyUNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	linux-raspi-5.4	< any	UNKNOWN

References

launchpad.net/bugs/cve/CVE-2023-28464

lore.kernel.org/linux-bluetooth/[email protected]/

lore.kernel.org/lkml/[email protected]/

nvd.nist.gov/vuln/detail/CVE-2023-28464

security-tracker.debian.org/tracker/CVE-2023-28464

syzkaller.appspot.com/bug?id=1bb51491ca5df96a5f724899d1dbb87afda61419

www.cve.org/CVERecord?id=CVE-2023-28464

www.openwall.com/lists/oss-security/2023/03/28/2

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

7.3 High

AI Score

Confidence

High

4.3 Medium

CVSS2

Access Vector

LOCAL

Access Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:L/Au:S/C:P/I:P/A:P

0.0004 Low

EPSS

Percentile

5.3%

JSON

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