Unauthenticated service interruption via unchecked BA request
Published Jul 13, 2021 · Updated Aug 3, 2024
A buffer overflow in Qualcomm Snapdragon's WLAN component allows remote attackers to crash affected devices through a crafted Block Ack request. The WLAN Block Ack request handler consumes attacker-controlled request data without a length check, allowing excess data to overrun its buffer and trigger a reachable assertion. The network path requires no privileges or user interaction, and the published impact is limited to device or WLAN-service interruption, with no data access or modification.
Summary
What happened
A buffer overflow in Qualcomm Snapdragon's WLAN component allows remote attackers to crash affected devices through a crafted Block Ack request. The WLAN Block Ack request handler consumes attacker-controlled request data without a length check, allowing excess data to overrun its buffer and trigger a reachable assertion. The network path requires no privileges or user interaction, and the published impact is limited to device or WLAN-service interruption, with no data access or modification.
The record
- CVE
- CVE-2021-1907
- Published
- Jul 13, 2021
- Updated
- Aug 3, 2024
- Vendor
- Qualcomm
- Product
- Snapdragon
- Classifications
- CWE-120, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 13, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=APQ8053
- Affected versionversion=CSRB31024
- Affected versionversion=MSM8953
- Affected versionversion=QCA6175A
- Affected versionversion=QCA6390
- Affected versionversion=QCA6391
- Affected versionversion=QCA6426
- Affected versionversion=QCA6436
- Affected versionversion=QCA6564A
- Affected versionversion=QCA6564AU
- Affected versionversion=QCA6574
- Affected versionversion=QCA6574A
- Affected versionversion=QCA6574AU
- Affected versionversion=QCA6584AU
- Affected versionversion=QCA6595
- Affected versionversion=QCA6595AU
- Affected versionversion=QCA6696
- Affected versionversion=QCM4290
- Affected versionversion=QCM6125
- Affected versionversion=QCS4290
- Affected versionversion=QCS6125
- Affected versionversion=SA415M
- Affected versionversion=SA515M
- Affected versionversion=SA6145P
- Affected versionversion=SA6150P
- Affected versionversion=SA6155
- Affected versionversion=SA6155P
- Affected versionversion=SA8145P
- Affected versionversion=SA8150P
- Affected versionversion=SA8155
- Affected versionversion=SA8155P
- Affected versionversion=SA8195P
- Affected versionversion=SD480
- Affected versionversion=SD 636
- Affected versionversion=SD660
- Affected versionversion=SD665
- Affected versionversion=SD670
- Affected versionversion=SD710
- Affected versionversion=SD765
- Affected versionversion=SD765G
- Affected versionversion=SD768G
- Affected versionversion=SD778G
- Affected versionversion=SD780G
- Affected versionversion=SD835
- Affected versionversion=SD845
- Affected versionversion=SD855
- Affected versionversion=SD865 5G
- Affected versionversion=SD870
- Affected versionversion=SD888
- Affected versionversion=SD888 5G
- Affected versionversion=SDM630
- Affected versionversion=SDX55
- Affected versionversion=SDX55M
- Affected versionversion=SDXR2 5G
- Affected versionversion=SM7250P
- Affected versionversion=SM7325P
- Affected versionversion=WCD9326
- Affected versionversion=WCD9335
- Affected versionversion=WCD9340
- Affected versionversion=WCD9341
- Affected versionversion=WCD9370
- Affected versionversion=WCD9375
- Affected versionversion=WCD9380
- Affected versionversion=WCD9385
- Affected versionversion=WCN3615
- Affected versionversion=WCN3680B
- Affected versionversion=WCN3910
- Affected versionversion=WCN3950
- Affected versionversion=WCN3980
- Affected versionversion=WCN3988
- Affected versionversion=WCN3990
- Affected versionversion=WCN3991
- Affected versionversion=WCN3998
- Affected versionversion=WCN6740
- Affected versionversion=WCN6750
- Affected versionversion=WCN6850
- Affected versionversion=WCN6851
- Affected versionversion=WCN6855
- Affected versionversion=WCN6856
- Affected versionversion=WSA8810
- Affected versionversion=WSA8815
- Affected versionversion=WSA8830
- Affected versionversion=WSA8835
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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