CVE-2020-24338

high-risk
Published 2020-12-11

An issue was discovered in picoTCP 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 writes that lead to Denial-of-Service and Remote Code Execution.

Do I need to act?

!
16.5% chance of exploitation in next 30 days
EPSS score — higher than 84% of all CVEs
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10 Critical
NETWORK / LOW complexity

Affected Products (1)

Picotcp

Affected Vendors

Altran

References (4)

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
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
50
/ 100
high-risk
Severity 32/34 · Critical
Exploitability 13/34 · Low
Exposure 5/34 · Minimal