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
CVSSv4.0: 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/E:U/U:Green
CVE-ID: CVE-2020-11298
CWE-ID: CWE-367
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerable software:
AQT1000
AR8031
AR8035
CSRA6620
CSRA6640
MDM9205
MDM9628
QCA4004
QCA6390
QCA6391
QCA6420
QCA6421
QCA6426
QCA6430
QCA6431
QCA6436
QCA6564A
QCA6564AU
QCA6574A
QCA6584AU
QCA6595
QCA6595AU
QCA6696
QCA8337
QCA9367
QCA9984
QCM2290
QCM4290
QCM6125
QCS2290
QCS410
QCS4290
QCS603
QCS610
QCS6125
QSM8250
SA415M
SA515M
SA8155
SA8155P
SA8195P
SC8180X+SDX55
SD8C
SD8CX
SD460
SD480
SD662
SD678
SD6905G
SD720G
SD750G
SD765
SD765G
SD768G
SD7c
SD8655G
SD870
SD8885G
SDM830
SDX50M
SDX55M
SDXR1
SDXR25G
SM4125
SM6250
SM6250P
SM7250P
WCD9306
WCD9326
WCD9330
WCD9335
WCD9340
WCD9341
WCD9360
WCD9370
WCD9371
WCD9375
WCD9380
WCD9385
WCN3910
WCN3950
WCN3980
WCN3988
WCN3990
WCN3991
WCN3998
WCN3999
WCN6750
WCN6850
WCN6851
WHS9410
WSA8810
WSA8815
WSA8830
WSA8835
MDM9206
QCA6574AU
QCA9377
QCS405
QCS605
SA6155P
SD675
SD665
SD670
SD710
SD712
SD730
SD855
SDX24
SDX55
AQT1000
AR8031
AR8035
CSRA6620
CSRA6640
MDM9205
MDM9628
QCA4004
QCA6390
QCA6391
QCA6420
QCA6421
QCA6426
QCA6430
QCA6431
QCA6436
QCA6564A
QCA6564AU
QCA6574A
QCA6584AU
QCA6595
QCA6595AU
QCA6696
QCA8337
QCA9367
QCA9984
QCM2290
QCM4290
QCM6125
QCS2290
QCS410
QCS4290
QCS603
QCS610
QCS6125
QSM8250
SA415M
SA515M
SA8155
SA8155P
SA8195P
SC8180X+SDX55
SD8C
SD8CX
SD460
SD480
SD662
SD678
SD6905G
SD720G
SD750G
SD765
SD765G
SD768G
SD7c
SD8655G
SD870
SD8885G
SDM830
SDX50M
SDX55M
SDXR1
SDXR25G
SM4125
SM6250
SM6250P
SM7250P
WCD9306
WCD9326
WCD9330
WCD9335
WCD9340
WCD9341
WCD9360
WCD9370
WCD9371
WCD9375
WCD9380
WCD9385
WCN3910
WCN3950
WCN3980
WCN3988
WCN3990
WCN3991
WCN3998
WCN3999
WCN6750
WCN6850
WCN6851
WHS9410
WSA8810
WSA8815
WSA8830
WSA8835
MDM9206
QCA6574AU
QCA9377
QCS405
QCS605
SA6155P
SD675
SD665
SD670
SD710
SD712
SD730
SD855
SDX24
SDX55
Software vendor:
Qualcomm
Qualcomm
Description
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.
Remediation
Install updates from vendor's website.