High severity · published Aug 19, 2021
CVE-2021-36762
An issue was discovered in HCC Embedded InterNiche NicheStack through 4.3
7.5
CVSS
2.3%
EPSS
No
On KEV
Description
An issue was discovered in HCC Embedded InterNiche NicheStack through 4.3. The tfshnd():tftpsrv.c TFTP packet processing function doesn't ensure that a filename is adequately '\0' terminated; therefore, a subsequent call to strlen for the filename might read out of bounds of the protocol packet buffer (if no '\0' byte exists within a reasonable range).
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.3% · higher than 83% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NI
Nichestack · Hcc-embedded
before 4.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-36762
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-36762
Mitigation
https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/
Product
https://www.hcc-embedded.com/about/about-interniche
Third Party Advisory
https://www.kb.cert.org/vuls/id/608209
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