CVE-2020-24340
CVE-2020-24340 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:
- Last modified:
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.
Frequently asked questions
- What is CVE-2020-24340?
- 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.
- How severe is CVE-2020-24340?
- CVE-2020-24340 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-2020-24340 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-2020-24340?
- CVE-2020-24340 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-2020-24340?
- 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-2020-24340 published?
- CVE-2020-24340 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
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- 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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