CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
AI Score
Confidence
High
EPSS
Percentile
99.9%
Jonathan Looney discovered that the Linux kernel default MSS is hard-coded to 48 bytes. This allows a remote peer to fragment TCP resend queues significantly more than if a larger MSS were enforced. 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 commits 967c05aee439e6e5d7d805e195b3a20ef5c433d6 and 5f3e2bf008c2221478101ee72f5cb4654b9fc363.
[
{
"product": "Linux kernel",
"vendor": "Linux",
"versions": [
{
"lessThan": "4.4.182",
"status": "affected",
"version": "4.4",
"versionType": "custom"
},
{
"lessThan": "4.9.182",
"status": "affected",
"version": "4.9",
"versionType": "custom"
},
{
"lessThan": "4.14.127",
"status": "affected",
"version": "4.14",
"versionType": "custom"
},
{
"lessThan": "4.19.52",
"status": "affected",
"version": "4.19",
"versionType": "custom"
},
{
"lessThan": "5.1.11",
"status": "affected",
"version": "5.1",
"versionType": "custom"
}
]
}
]
www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-010.txt
www.openwall.com/lists/oss-security/2019/06/28/2
www.openwall.com/lists/oss-security/2019/07/06/3
www.openwall.com/lists/oss-security/2019/07/06/4
www.securityfocus.com/bid/108818
access.redhat.com/errata/RHSA-2019:1594
access.redhat.com/errata/RHSA-2019:1602
access.redhat.com/errata/RHSA-2019:1699
access.redhat.com/security/vulnerabilities/tcpsack
cert-portal.siemens.com/productcert/pdf/ssa-462066.pdf
git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=5f3e2bf008c2221478101ee72f5cb4654b9fc363
git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=967c05aee439e6e5d7d805e195b3a20ef5c433d6
github.com/Netflix/security-bulletins/blob/master/advisories/third-party/2019-001.md
kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44193
kc.mcafee.com/corporate/index?page=content&id=SB10287
psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0008
security.netapp.com/advisory/ntap-20190625-0001/
support.f5.com/csp/article/K35421172
support.f5.com/csp/article/K35421172?utm_source=f5support&%3Butm_medium=RSS
usn.ubuntu.com/4041-1/
usn.ubuntu.com/4041-2/
wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SACKPanic
www.kb.cert.org/vuls/id/905115
www.oracle.com/security-alerts/cpujan2020.html
www.oracle.com/security-alerts/cpuoct2020.html
www.synology.com/security/advisory/Synology_SA_19_28
www.us-cert.gov/ics/advisories/icsa-19-253-03
www.us-cert.gov/ics/advisories/icsma-20-170-06
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
AI Score
Confidence
High
EPSS
Percentile
99.9%