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FreebsdCVE-2020-7451

HistoryApr 28, 2020 - 8:15 p.m.

CVE-2020-7451

2020-04-2820:15:12

CWE-908

freebsd

web.nvd.nist.gov

cve-2020-7451

freebsd

tcp syn-ack

vulnerability

kernel memory disclosure

ipv6

nvd

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

AI Score

5.2

Confidence

High

EPSS

0.001

Percentile

35.9%

JSON

In FreeBSD 12.1-STABLE before r358739, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r358740, and 11.3-RELEASE before 11.3-RELEASE-p7, a TCP SYN-ACK or challenge TCP-ACK segment over IPv6 that is transmitted or retransmitted does not properly initialize the Traffic Class field disclosing one byte of kernel memory over the network.

Affected configurations

Nvd

Node

freebsdfreebsdMatch11.3-

freebsdfreebsdMatch11.3p1

freebsdfreebsdMatch11.3p2

freebsdfreebsdMatch11.3p3

freebsdfreebsdMatch11.3p4

freebsdfreebsdMatch11.3p5

freebsdfreebsdMatch11.3p6

freebsdfreebsdMatch12.1-

freebsdfreebsdMatch12.1p1

freebsdfreebsdMatch12.1p2

VendorProductVersionCPE
freebsdfreebsd11.3cpe:2.3:o:freebsd:freebsd:11.3:-:*:*:*:*:*:*
freebsdfreebsd11.3cpe:2.3:o:freebsd:freebsd:11.3:p1:*:*:*:*:*:*
freebsdfreebsd11.3cpe:2.3:o:freebsd:freebsd:11.3:p2:*:*:*:*:*:*
freebsdfreebsd11.3cpe:2.3:o:freebsd:freebsd:11.3:p3:*:*:*:*:*:*
freebsdfreebsd11.3cpe:2.3:o:freebsd:freebsd:11.3:p4:*:*:*:*:*:*
freebsdfreebsd11.3cpe:2.3:o:freebsd:freebsd:11.3:p5:*:*:*:*:*:*
freebsdfreebsd11.3cpe:2.3:o:freebsd:freebsd:11.3:p6:*:*:*:*:*:*
freebsdfreebsd12.1cpe:2.3:o:freebsd:freebsd:12.1:-:*:*:*:*:*:*
freebsdfreebsd12.1cpe:2.3:o:freebsd:freebsd:12.1:p1:*:*:*:*:*:*
freebsdfreebsd12.1cpe:2.3:o:freebsd:freebsd:12.1:p2:*:*:*:*:*:*

Vendor	Product	Version	CPE
freebsd	freebsd	11.3	cpe:2.3:o:freebsd:freebsd:11.3:-::::::
freebsd	freebsd	11.3	cpe:2.3:o:freebsd:freebsd:11.3:p1::::::
freebsd	freebsd	11.3	cpe:2.3:o:freebsd:freebsd:11.3:p2::::::
freebsd	freebsd	11.3	cpe:2.3:o:freebsd:freebsd:11.3:p3::::::
freebsd	freebsd	11.3	cpe:2.3:o:freebsd:freebsd:11.3:p4::::::
freebsd	freebsd	11.3	cpe:2.3:o:freebsd:freebsd:11.3:p5::::::
freebsd	freebsd	11.3	cpe:2.3:o:freebsd:freebsd:11.3:p6::::::
freebsd	freebsd	12.1	cpe:2.3:o:freebsd:freebsd:12.1:-::::::
freebsd	freebsd	12.1	cpe:2.3:o:freebsd:freebsd:12.1:p1::::::
freebsd	freebsd	12.1	cpe:2.3:o:freebsd:freebsd:12.1:p2::::::

CNA Affected

[
  {
    "product": "FreeBSD",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "12.1-STABLE before r358739, 12.1-RELEASE before 12.1-RELEASE-p3, 11.3-STABLE before r358740, 11.3-RELEASE before 11.3-RELEASE-p7"
      }
    ]
  }
]

References

security.FreeBSD.org/advisories/FreeBSD-SA-20:04.tcp.asc

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

AI Score

5.2

Confidence

High

EPSS

0.001

Percentile

35.9%

JSON

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