High severity · published Mar 26, 2021
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…
7.3
CVSS
4.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.1% · higher than 91% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
Freebsd · Freebsd
11.3; 11.3; 11.3; 11.3; 11.3; 11.3; +19 more · source: NVD
SR
Simatic Rf350m Firmware · Siemens
All versions, or not specified · source: NVD
SR
Simatic Rf650m Firmware · Siemens
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-7461
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-7461
Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-288459.pdf
Vendor Advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-20:26.dhclient.asc
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