How severe is CVE-2020-24339?

CVE-2020-24339 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-24339 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-24339?

CVE-2020-24339 primarily affects Altran Picotcp. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-24339?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-24339 published?

CVE-2020-24339 was published on 2020-12-11 and last updated on 2026-06-17.

CVE-2020-24339

CVE-2020-24339 is a high-severity vulnerability in Altran Picotcp with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-125.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
Affected product: Altran Picotcp
Published: 2020-12-11
Last modified: 2026-06-17

Description

An issue was discovered in picoTCP and picoTCP-NG through 1.7.0. The DNS domain name record decompression functionality in pico_dns_decompress_name() in pico_dns_common.c does not validate the compression pointer offset values with respect to the actual data present in a DNS response packet, causing out-of-bounds reads that lead to Denial-of-Service.

Frequently asked questions

What is CVE-2020-24339?: An issue was discovered in picoTCP and picoTCP-NG through 1.7.0. The DNS domain name record decompression functionality in pico_dns_decompress_name() in pico_dns_common.c does not validate the compression pointer offset values with respect to the actual data present in a DNS response packet, causing out-of-bounds reads that lead to Denial-of-Service.
How severe is CVE-2020-24339?: CVE-2020-24339 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-24339 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-24339?: CVE-2020-24339 primarily affects Altran Picotcp. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-24339?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-24339 published?: CVE-2020-24339 was published on 2020-12-11 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:altran:picotcp:*:*:*:*:*:*:*:*
cpe:2.3:a:altran:picotcp-ng:*:*:*:*:*:*:*:*

More vulnerabilities in Altran Picotcp

CVE-2021-33304 — Critical (CVSS 9.8): Double Free vulnerability in virtualsquare picoTCP v1.7.0 and picoTCP-NG v2.1 in modules/pico_fragments.c in function…
CVE-2020-24338 — Critical (CVSS 9.8): An issue was discovered in picoTCP through 1.7.0. The DNS domain name record decompression functionality in…
CVE-2017-1000210 — Critical (CVSS 9.8): picoTCP (versions 1.7.0 - 1.5.0) is vulnerable to stack buffer overflow resulting in code execution or denial of…
CVE-2020-24341 — Critical (CVSS 9.1): An issue was discovered in picoTCP and picoTCP-NG through 1.7.0. The TCP input data processing function in pico_tcp.c…
CVE-2020-17441 — Critical (CVSS 9.1): An issue was discovered in picoTCP 1.7.0. The code for processing the IPv6 headers does not validate whether the IPv6…
CVE-2023-30463 — High (CVSS 7.5): Altran picoTCP through 1.7.0 allows memory corruption (and subsequent denial of service) because of an integer overflow…

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Other CWE-125 (Out-of-bounds Read) vulnerabilities

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CVE-2021-41556 — Critical (CVSS 10.0): sqclass.cpp in Squirrel through 2.2.5 and 3.x through 3.1 allows an out-of-bounds read (in the core interpreter) that…
CVE-2021-21777 — Critical (CVSS 10.0): An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer…
CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
CVE-2013-0767 — Critical (CVSS 10.0): The nsSVGPathElement::GetPathLengthScale function in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and…

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