Time-of-check Time-of-use (TOCTOU) Race Condition in Qualcomm products - CVE-2020-11298
Published: June 7, 2021
Vulnerability identifier: #VU53858
CSH Severity: Medium
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-11298
CWE-ID: CWE-367
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local application to escalate privileges on the system.
The vulnerability exists due to a race condition in QTEE subsystem. While waiting for a response to a callback or listener request, non-secure clients can change permissions to shared memory buffers used by HLOS Invoke Call to secure kernel. A local application can trigger Time-of-check Time-of-use (TOCTOU) race condition and escalate privileges on the system.
The vulnerability exists due to a race condition in QTEE subsystem. While waiting for a response to a callback or listener request, non-secure clients can change permissions to shared memory buffers used by HLOS Invoke Call to secure kernel. A local application can trigger Time-of-check Time-of-use (TOCTOU) race condition and escalate privileges on the system.
Affected software
SD870
WCD9306
SM7250P
SM6250P
SM6250
SM4125
SDXR25G
SDXR1
SDX55M
SDX50M
SDM830
SD8885G
WCD9326
SD8655G
SD7c
SD768G
SD765G
SD765
SD750G
SD720G
SD6905G
SD678
WCN3980
WSA8835
WSA8830
WSA8815
WSA8810
WHS9410
WCN6851
WCN6850
WCN6750
WCN3999
WCN3998
WCN3991
WCN3990
WCN3988
WCN3950
WCN3910
WCD9385
WCD9380
WCD9375
WCD9371
WCD9370
WCD9360
WCD9341
WCD9340
WCD9335
WCD9330
QCA6430
QCA9367
QCA8337
QCA6696
QCA6595AU
QCA6595
QCA6584AU
QCA6574A
QCA6564AU
QCA6564A
QCA6436
QCA6431
QCA9984
QCA6426
QCA6421
QCA6420
QCA6391
QCA6390
QCA4004
MDM9628
MDM9205
CSRA6640
CSRA6620
AR8035
AR8031
SA415M
SD662
SD480
SD460
SD8CX
SD8C
SC8180X+SDX55
SA8195P
SA8155P
SA8155
SA515M
AQT1000
QSM8250
QCS6125
QCS610
QCS603
QCS4290
QCS410
QCS2290
QCM6125
QCM4290
QCM2290
SDX55
SDX24
SD855
SD730
SD712
SD710
SD670
QCA9377
QCA6574AU
MDM9206
SD665
SD675
SA6155P
QCS605
QCS405
Google Android
WCD9306
SM7250P
SM6250P
SM6250
SM4125
SDXR25G
SDXR1
SDX55M
SDX50M
SDM830
SD8885G
WCD9326
SD8655G
SD7c
SD768G
SD765G
SD765
SD750G
SD720G
SD6905G
SD678
WCN3980
WSA8835
WSA8830
WSA8815
WSA8810
WHS9410
WCN6851
WCN6850
WCN6750
WCN3999
WCN3998
WCN3991
WCN3990
WCN3988
WCN3950
WCN3910
WCD9385
WCD9380
WCD9375
WCD9371
WCD9370
WCD9360
WCD9341
WCD9340
WCD9335
WCD9330
QCA6430
QCA9367
QCA8337
QCA6696
QCA6595AU
QCA6595
QCA6584AU
QCA6574A
QCA6564AU
QCA6564A
QCA6436
QCA6431
QCA9984
QCA6426
QCA6421
QCA6420
QCA6391
QCA6390
QCA4004
MDM9628
MDM9205
CSRA6640
CSRA6620
AR8035
AR8031
SA415M
SD662
SD480
SD460
SD8CX
SD8C
SC8180X+SDX55
SA8195P
SA8155P
SA8155
SA515M
AQT1000
QSM8250
QCS6125
QCS610
QCS603
QCS4290
QCS410
QCS2290
QCM6125
QCM4290
QCM2290
SDX55
SDX24
SD855
SD730
SD712
SD710
SD670
QCA9377
QCA6574AU
MDM9206
SD665
SD675
SA6155P
QCS605
QCS405
Google Android
How to mitigate CVE-2020-11298
Install updates from vendor's website.
Google Android - addressed in versions 8.1 2021-06-05, 9.0 2021-06-05, 10 2021-06-05, 11 2021-06-05