Critical severity · published Mar 31, 2022
CVE-2021-43722
D-Link DIR-645 1.03 A1 is vulnerable to Buffer Overflow
9.8
CVSS
3.2%
EPSS
No
On KEV
Description
D-Link DIR-645 1.03 A1 is vulnerable to Buffer Overflow. The hnap_main function in the cgibin handler uses sprintf to format the soapaction header onto the stack and has no limit on the size.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.2% · higher than 88% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DF
Dir-645 Firmware · Dlink
1.03 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-43722
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-43722
Exploit
https://github.com/luqiut/iot/blob/main/DIR-645%20Stack%20overflow.md
Vendor Advisory
https://www.dlink.com/en/security-bulletin/
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