#VU61834 Out-of-bounds read in Qualcomm products - CVE-2021-35071

Cybersecurity Help s.r.o.

Published: 2022-04-04

Vulnerability identifier: #VU61834

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-35071

CWE-ID: CWE-125

Exploitation vector: Local

Exploit availability: No

Vendor: Qualcomm

Description

The vulnerability allows a local application to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition while copying data from DBR buffer to RX buffer in WLAN component. A malicious application can trigger an out-of-bounds read error and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

AQT1000: All versions

AR8035: All versions

AR9380: All versions

CSR8811: All versions

CSRB31024: All versions

FSM10055: All versions

FSM10056: All versions

IPQ4018: All versions

IPQ4019: All versions

IPQ4028: All versions

IPQ4029: All versions

IPQ5010: All versions

IPQ5018: All versions

IPQ5028: All versions

IPQ6000: All versions

IPQ6010: All versions

IPQ6018: All versions

IPQ6028: All versions

IPQ8064: All versions

IPQ8065: All versions

IPQ8068: All versions

IPQ8070: All versions

IPQ8070A: All versions

IPQ8071: All versions

IPQ8071A: All versions

IPQ8072: All versions

IPQ8072A: All versions

IPQ8074: All versions

IPQ8074A: All versions

IPQ8076: All versions

IPQ8076A: All versions

IPQ8078: All versions

IPQ8078A: All versions

IPQ8173: All versions

IPQ8174: All versions

PMP8074: All versions

QAM8295P: All versions

QCA4024: All versions

QCA6175A: All versions

QCA6390: All versions

QCA6391: All versions

QCA6426: All versions

QCA6428: All versions

QCA6436: All versions

QCA6438: All versions

QCA6554A: All versions

QCA6564AU: All versions

QCA6574: All versions

QCA6574A: All versions

QCA6574AU: All versions

QCA6584AU: All versions

QCA6595: All versions

QCA6595AU: All versions

QCA6696: All versions

QCA7500: All versions

QCA8072: All versions

QCA8075: All versions

QCA8081: All versions

QCA8337: All versions

QCA9880: All versions

QCA9886: All versions

QCA9888: All versions

QCA9889: All versions

QCA9898: All versions

QCA9980: All versions

QCA9984: All versions

QCA9985: All versions

QCA9990: All versions

QCA9992: All versions

QCA9994: All versions

QCM2290: All versions

QCM4290: All versions

QCM6125: All versions

QCM6490: All versions

QCN5021: All versions

QCN5022: All versions

QCN5024: All versions

QCN5052: All versions

QCN5054: All versions

QCN5064: All versions

QCN5122: All versions

QCN5124: All versions

QCN5152: All versions

QCN5154: All versions

QCN5164: All versions

QCN5550: All versions

QCN6023: All versions

QCN6024: All versions

QCN6100: All versions

QCN6102: All versions

QCN6112: All versions

QCN6122: All versions

QCN6132: All versions

QCN9000: All versions

QCN9011: All versions

QCN9012: All versions

QCN9022: All versions

QCN9024: All versions

QCN9070: All versions

QCN9072: All versions

QCN9074: All versions

QCN9100: All versions

QCS2290: All versions

QCS4290: All versions

QCS610: All versions

QCS6125: All versions

QCS6490: All versions

QCX315: All versions

QRB5165: All versions

QRB5165M: All versions

QRB5165N: All versions

SA4150P: All versions

SA4155P: All versions

SA415M: All versions

SA515M: All versions

SA6145P: All versions

SA6150P: All versions

SA6155: All versions

SA6155P: All versions

SA8145P: All versions

SA8150P: All versions

SA8155: All versions

SA8155P: All versions

SA8195P: All versions

SA8295P: All versions

SD8Gen15G: All versions

SD460: All versions

SD480: All versions

SD662: All versions

SD765: All versions

SD765G: All versions

SD768G: All versions

SD778G: All versions

SD780G: All versions

SD855: All versions

SD8655G: All versions

SD870: All versions

SD8885G: All versions

SDX55: All versions

SDX55M: All versions

SDX65: All versions

SDXR1: All versions

SDXR25G: All versions

SM6375: All versions

SM7250P: All versions

SM7325P: All versions

SW5100: All versions

SW5100P: All versions

WCD9326: All versions

WCD9341: All versions

WCD9360: All versions

WCD9370: All versions

WCD9375: All versions

WCD9380: All versions

WCD9385: All versions

WCN3910: All versions

WCN3950: All versions

WCN3980: All versions

WCN3988: All versions

WCN3991: All versions

WCN3998: All versions

WCN6740: All versions

WCN6750: All versions

WCN6850: All versions

WCN6851: All versions

WCN6855: All versions

WCN6856: All versions

WSA8810: All versions

WSA8815: All versions

WSA8830: All versions

WSA8835: All versions

External links
https://www.qualcomm.com/company/product-security/bulletins/april-2022-bulletin
https://source.codeaurora.org/quic/qsdk/platform/vendor/qcom-opensource/wlan/qca-wifi-host-cmn/commit/?id=ccd086c32be5dd3a5bfb2df800850b8dc751adf3

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

Latest bulletins with this vulnerability

Multiple vulnerabilities in Qualcomm chipsets