Vulnerability Name:

CVE-2020-7461 (CCN-198986)

Assigned:2020-09-02
Published:2020-09-02
Updated:2021-09-16
Summary: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 v3 Severity:7.3 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
6.4 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): Low
9.8 Critical (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
8.5 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): High
CVSS v2 Severity:7.5 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): Partial
10.0 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): Complete
Integrity (I): Complete
Availibility (A): Complete
Vulnerability Type:CWE-787
Vulnerability Consequences:Gain Access
References:Source: MITRE
Type: CNA
CVE-2020-7461

Source: MISC
Type: Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-288459.pdf

Source: XF
Type: UNKNOWN
freebsd-cve20207461-bo(198986)

Source: MISC
Type: Vendor Advisory
https://security.FreeBSD.org/advisories/FreeBSD-SA-20:26.dhclient.asc

Source: CCN
Type: FreeBSD Security Advisory FreeBSD-SA-20:26.dhclient
dhclient heap overflow

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2020-7461

Vulnerable Configuration:Configuration 1:
  • cpe:/o:freebsd:freebsd:11.3:-:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:11.3:p1:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:11.3:p10:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:11.3:p11:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:11.3:p12:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:11.3:p2:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:11.3:p3:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:11.3:p4:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:11.3:p5:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:11.3:p6:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:11.3:p7:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:11.3:p8:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:11.3:p9:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:11.4:-:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:11.4:p1:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:11.4:p2:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:12.1:-:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:12.1:p1:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:12.1:p2:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:12.1:p3:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:12.1:p4:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:12.1:p5:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:12.1:p6:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:12.1:p7:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:12.1:p8:*:*:*:*:*:*

    • Configuration 2:
  • cpe:/o:siemens:simatic_rf350m_firmware:*:*:*:*:*:*:*:*
  • AND
  • cpe:/h:siemens:simatic_rf350m:-:*:*:*:*:*:*:*

    • Configuration 3:
  • cpe:/o:siemens:simatic_rf650m_firmware:*:*:*:*:*:*:*:*
  • AND
  • cpe:/h:siemens:simatic_rf650m:-:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/o:freebsd:freebsd:12.1:stable:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:12.1:release:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:11.4:stable:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:11.3:release:*:*:*:*:*:*
  • OR cpe:/o:freebsd:freebsd:11.4:release:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    freebsd freebsd 11.3 -
    freebsd freebsd 11.3 p1
    freebsd freebsd 11.3 p10
    freebsd freebsd 11.3 p11
    freebsd freebsd 11.3 p12
    freebsd freebsd 11.3 p2
    freebsd freebsd 11.3 p3
    freebsd freebsd 11.3 p4
    freebsd freebsd 11.3 p5
    freebsd freebsd 11.3 p6
    freebsd freebsd 11.3 p7
    freebsd freebsd 11.3 p8
    freebsd freebsd 11.3 p9
    freebsd freebsd 11.4 -
    freebsd freebsd 11.4 p1
    freebsd freebsd 11.4 p2
    freebsd freebsd 12.1 -
    freebsd freebsd 12.1 p1
    freebsd freebsd 12.1 p2
    freebsd freebsd 12.1 p3
    freebsd freebsd 12.1 p4
    freebsd freebsd 12.1 p5
    freebsd freebsd 12.1 p6
    freebsd freebsd 12.1 p7
    freebsd freebsd 12.1 p8
    siemens simatic rf350m firmware *
    siemens simatic rf350m -
    siemens simatic rf650m firmware *
    siemens simatic rf650m -
    freebsd freebsd 12.1 stable
    freebsd freebsd 12.1 release
    freebsd freebsd 11.4 stable
    freebsd freebsd 11.3 release
    freebsd freebsd 11.4 release