High severity · published Dec 11, 2020
CVE-2020-24340
An issue was discovered in picoTCP and picoTCP-NG through 1.7.0
7.5
CVSS
2.9%
EPSS
No
On KEV
Description
An issue was discovered in picoTCP and picoTCP-NG through 1.7.0. The code that processes DNS responses in pico_mdns_handle_data_as_answers_generic() in pico_mdns.c does not check whether the number of answers/responses specified in a DNS packet header corresponds to the response data available in the packet, leading to an out-of-bounds read, invalid pointer dereference, and Denial-of-Service.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.9% · higher than 87% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PI
Picotcp · Altran
through 1.7.0 · source: NVD
PI
Picotcp-ng · Altran
through 1.7.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-24340
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-24340
Third Party Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01
Third Party Advisory
https://www.kb.cert.org/vuls/id/815128
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