Picotcp
CVE-2020-24340
HIGH
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
1DescriptionNVD
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.
AnalysisAI
An issue was discovered in picoTCP and picoTCP-NG through 1.7.0. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
Technical ContextAI
This vulnerability is classified as Out-of-bounds Read (CWE-125), which allows attackers to read data from memory outside the intended buffer boundaries. 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 products include: Altran Picotcp, Altran Picotcp-Ng. Version information: through 1.7.0..
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate array indices and buffer lengths. Use memory-safe languages. Enable AddressSanitizer during testing.
Altran picoTCP through 1.7.0 allows memory corruption (and subsequent denial of service) because of an integer overflow
picoTCP (versions 1.7.0 - 1.5.0) is vulnerable to stack buffer overflow resulting in code execution or denial of service
An issue was discovered in picoTCP through 1.7.0. Rated critical severity (CVSS 9.8), this vulnerability is remotely exp
An issue was discovered in picoTCP and picoTCP-NG through 1.7.0. Rated critical severity (CVSS 9.1), this vulnerability
An issue was discovered in picoTCP 1.7.0. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable
VirtualSquare picoTCP (aka PicoTCP-NG) through 2.1 does not properly check whether header sizes would result in accessin
VirtualSquare picoTCP (aka PicoTCP-NG) through 2.1 lacks certain size calculations before attempting to set a value of a
VirtualSquare picoTCP (aka PicoTCP-NG) through 2.1 does not have an MSS lower bound (e.g., it could be zero). Rated high
VirtualSquare picoTCP (aka PicoTCP-NG) through 2.1 does not check the transport layer length in a frame before performin
An issue was discovered in picoTCP and picoTCP-NG through 1.7.0. Rated high severity (CVSS 7.5), this vulnerability is r
An issue was discovered in picoTCP and picoTCP-NG through 1.7.0. Rated high severity (CVSS 7.5), this vulnerability is r
An issue was discovered in picoTCP 1.7.0. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no
Same weakness CWE-125 – Out-of-bounds Read
View allSame technique Buffer Overflow
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External POC / Exploit Code
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