Vulnerability · Published Dec 11, 2020 · Assigned by mitre

CVE-2020-17440

High 7.5

In plain English

A high-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.8% (higher than 86% of all known vulnerabilities).

Severity (CVSS NVD)7.5High

Exploit odds (30 days)2.8%top 13.5% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. The code that parses incoming DNS packets does not validate that domain names present in the DNS responses have '\0' termination. This results in errors when calculating the offset of the pointer that jumps over domain name bytes in DNS response packets when a name lacks this termination, and eventually leads to dereferencing the pointer at an invalid/arbitrary address, within newdata() and parse_name() in resolv.c.

Affected products (as reported)

Vendor	Product	Versions
n/a	n/a	n/a

References

https://www.kb.cert.org/vuls/id/815128 x_refsource_MISC
https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01 x_refsource_MISC