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CVE-2020-24340

HIGH
7.5
CVSS Score
Published: December 11, 2020 at 10:54 PM UTC
Updated: June 17, 2026 at 03:05 AM UTC
2 products affected across 1 vendorPicotcpPicotcp Ng

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Severity
HIGH7.5
Exploit prediction
EPSS 3%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Picotcp· Altran
95%
v ≤ 1.7.0
Picotcp Ng· Altran
95%
v ≤ 1.7.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

x_refsource_MISCThird Party AdvisoryUS Government Resource
Source: [email protected]
https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01
x_refsource_MISCThird Party AdvisoryUS Government Resource
Source: [email protected]
https://www.kb.cert.org/vuls/id/815128

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-125

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