#VU61840 Time-of-check Time-of-use (TOCTOU) Race Condition in Qualcomm products - CVE-2021-30342

Vulnerability identifier: #VU61840

Vulnerability risk: High

CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

CVE-ID: CVE-2021-30342

CWE-ID: CWE-367

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
APQ8009W
AQT1000
CSRB31024
FSM10055
FSM10056
MDM8207
MDM9205
MDM9207
MDM9250
MDM9628
MDM9655
QCA4004
QCA6420
QCA6430
QCA6564A
QCA6564AU
QCA6574
QCA6574A
QCA6584
QCA6584AU
QCA6595AU
QCA6696
QCA9367
QCM2290
QCM4290
QCM6125
QCS2290
QCS410
QCS4290
QCS610
QCS6125
QSW8573
SA415M
SA6145P
SA6150P
SA8145P
SA8150P
SA8155P
SA8195P
SD8cxGen2
SD429
SD439
SD460
SD660
SD662
SD678
SD680
SD720G
SD7c
SDA429W
SDW2500
SDX12
SDXR1
SM6250
SM6250P
SW5100
SW5100P
WCD9306
WCD9330
WCD9370
WCD9375
WCD9380
WCN3610
WCN3620
WCN3910
WCN3950
WCN3988
WCN3991
WCN3998
WSA8830
WSA8835
APQ8017
APQ8096AU
MDM9150
MDM9206
MDM9607
MDM9640
MDM9650
MSM8909W
MSM8996AU
QCA6174A
QCA6574AU
QCA9377
SA6155P
SD675
SD205
SD210
SD665
SD730
SD850
SD855
SDM429W
SDX20
SDX24

Software vendor:
Qualcomm

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to a race condition in LTE component between PDCP and RRC tasks when processing RRC Command packets. A remote attacker can send specially crafted packets to the device and execute arbitrary code on the system.

Install updates from vendor's website.

• https://www.qualcomm.com/company/product-security/bulletins/april-2022-bulletin