Vulnerability Name: | CVE-2020-7462 (CCN-198984) |
Assigned: | 2020-09-02 |
Published: | 2020-09-02 |
Updated: | 2021-04-02 |
Summary: | In 11.4-PRERELEASE before r360733 and 11.3-RELEASE before p13, improper mbuf handling in the kernel causes a use-after-free bug by sending IPv6 Hop-by-Hop options over the loopback interface. The use-after-free situation may result in unintended kernel behaviour including a kernel panic.
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CVSS v3 Severity: | 5.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H) 4.8 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)Exploitability Metrics: | Attack Vector (AV): Local Attack Complexity (AC): Low Privileges Required (PR): Low User Interaction (UI): None | Scope: | Scope (S): Unchanged
| Impact Metrics: | Confidentiality (C): None Integrity (I): None Availibility (A): High | 6.2 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) 5.4 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)Exploitability Metrics: | Attack Vector (AV): Local Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None | Scope: | Scope (S): Unchanged
| Impact Metrics: | Confidentiality (C): None Integrity (I): None Availibility (A): High |
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CVSS v2 Severity: | 4.9 Medium (CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C)Exploitability Metrics: | Access Vector (AV): Local Access Complexity (AC): Low Authentication (Au): None | Impact Metrics: | Confidentiality (C): None Integrity (I): None Availibility (A): Complete | 4.9 Medium (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C)Exploitability Metrics: | Access Vector (AV): Local Access Complexity (AC): Low Athentication (Au): None
| Impact Metrics: | Confidentiality (C): None Integrity (I): None Availibility (A): Complete |
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Vulnerability Type: | CWE-416
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Vulnerability Consequences: | Denial of Service |
References: | Source: MITRE Type: CNA CVE-2020-7462
Source: XF Type: UNKNOWN freebsd-cve20207462-dos(198984)
Source: MISC Type: Vendor Advisory https://security.FreeBSD.org/advisories/FreeBSD-SA-20:24.ipv6.asc
Source: CCN Type: FreeBSD Security Advisory FreeBSD-SA-20:24.ipv6 IPv6 Hop-by-Hop options use-after-free bug
Source: CCN Type: WhiteSource Vulnerability Database CVE-2020-7462
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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:11.4:-:*:*:*:*:*:*OR cpe:/o:freebsd:freebsd:11.3:p9:*:*:*:*:*:* Configuration CCN 1: cpe:/o:freebsd:freebsd:11.3:release:*:*:*:*:*:*
Denotes that component is vulnerable |
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