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ubuntucveUbuntu.comUB:CVE-2019-11477
HistoryJun 17, 2019 - 12:00 a.m.

CVE-2019-11477

2019-06-1700:00:00
ubuntu.com
ubuntu.com
14

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

7.8 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

0.972 High

EPSS

Percentile

99.8%

JSON

Jonathan Looney discovered that the TCP_SKB_CB(skb)->tcp_gso_segs value was
subject to an integer overflow in the Linux kernel when handling TCP
Selective Acknowledgments (SACKs). A remote attacker could use this to
cause a denial of service. This has been fixed in stable kernel releases
4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commit
3b4929f65b0d8249f19a50245cd88ed1a2f78cff.

Bugs

Notes

Author Note
tyhicks Known as “SACK Panic”
OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchlinux< 4.15.0-52.56UNKNOWN
ubuntu18.10noarchlinux< 4.18.0-22.23UNKNOWN
ubuntu19.04noarchlinux< 5.0.0-17.18UNKNOWN
ubuntu14.04noarchlinux< 3.13.0-171.222) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu16.04noarchlinux< 4.4.0-151.178UNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1041.43UNKNOWN
ubuntu18.10noarchlinux-aws< 4.18.0-1018.20UNKNOWN
ubuntu19.04noarchlinux-aws< 5.0.0-1008.8UNKNOWN
ubuntu14.04noarchlinux-aws< 4.4.0-1046.50) Available with Ubuntu Pro or Ubuntu Pro (Infra-onlyUNKNOWN
ubuntu16.04noarchlinux-aws< 4.4.0-1085.96UNKNOWN
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7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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7.8 High

CVSS2

Access Vector

NETWORK

Access Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

COMPLETE

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

0.972 High

EPSS

Percentile

99.8%

JSON
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