Buffer overflow in FreeBSD
CVE-2020-7461
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.041 (90.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 90.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.041 · newest: 0.041 · change: 0.000
Affected products
- FreeBSD — versions 11.3, 11.4, 12.1
- Siemens Simatic Rf350m
- Siemens Simatic Rf350m Firmware
- Siemens Simatic Rf650m
- Siemens Simatic Rf650m Firmware
- FreeBSD — versions FreeBSD 12.1-RELEASE before p9, 11.4-RELEASE before p3, 11.3-RELEASE before p13
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security.FreeBSD.org/advisories/FreeBSD-SA-20:26.dhclient.asc (Vendor Advisory)
- cert-portal.siemens.com/productcert/pdf/ssa-288459.pdf (Third Party Advisory)
Frequently asked questions
- What is CVE-2020-7461?
- CVE-2020-7461 is a high-severity vulnerability in FreeBSD, classified under Out-of-bounds Write. CVSS score: 7.3/10. Published 2021-03-26.
- How severe is CVE-2020-7461?
- High severity. CVSS v3 base score is 7.3 out of 10.
- Is CVE-2020-7461 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.