Vulnerability · Published Mar 26, 2021 · Assigned by freebsd

CVE-2020-7461

High 7.3

In plain English

A high-severity security flaw in FreeBSD. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 4.1% (higher than 91% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS NVD)7.3High

Exploit odds (30 days)4.1%top 9.1% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack tooling1Public PoC

Official description

In FreeBSD 12.1-STABLE before r365010, 11.4-STABLE before r365011, 12.1-RELEASE before p9, 11.4-RELEASE before p3, and 11.3-RELEASE before p13, dhclient(8) fails to handle certain malformed input related to handling of DHCP option 119 resulting a heap overflow. The heap overflow could in principle be exploited to achieve remote code execution. The affected process runs with reduced privileges in a Capsicum sandbox, limiting the immediate impact of an exploit.

Affected products (as reported)

Vendor	Product	Versions
n/a	FreeBSD	FreeBSD 12.1-RELEASE before p9, 11.4-RELEASE before p3, 11.3-RELEASE before p13

References

https://security.FreeBSD.org/advisories/FreeBSD-SA-20:26.dhclient.asc x_refsource_MISC
https://cert-portal.siemens.com/productcert/pdf/ssa-288459.pdf x_refsource_MISC