CVE-2019-19050

Published: 18 November 2019

A memory leak in the crypto_reportstat() function in crypto/crypto_user_stat.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering crypto_reportstat_alg() failures, aka CID-c03b04dcdba1.

From the Ubuntu Security Team

It was discovered that the crypto subsystem in the Linux kernel did not properly deallocate memory in certain error conditions. A local attacker could use this to cause a denial of service (kernel memory exhaustion).

Priority

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.13.0-16.19)
	disco	Ignored (reached end-of-life)
	eoan	Released (5.3.0-40.32)
	focal	Not vulnerable (5.4.0-9.12)
	precise	Ignored (was needs-triage ESM criteria)
	trusty	Ignored (was needs-triage ESM criteria)
	upstream	Released (5.5~rc1)
	xenial	Not vulnerable (4.2.0-16.19)
	Patches: Introduced by cac5818c25d0423bda73e2b6997404ed0a7ed9e3 Fixed by c03b04dcdba1da39903e23cc4d072abf8f68f2dd
linux-aws Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1001.1)
	disco	Ignored (reached end-of-life)
	eoan	Released (5.3.0-1011.12)
	focal	Not vulnerable (5.4.0-1005.5)
	precise	Does not exist
	trusty	Ignored (was needs-triage ESM criteria)
	upstream	Released (5.5~rc1)
	xenial	Not vulnerable (4.4.0-1001.10)
linux-aws-5.0 Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-1024.27~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Does not exist
linux-aws-5.3 Launchpad, Ubuntu, Debian	bionic	Not vulnerable
	eoan	Does not exist
	focal	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Needs triage
	xenial	Does not exist
linux-aws-hwe Launchpad, Ubuntu, Debian	bionic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Not vulnerable (4.15.0-1030.31~16.04.1)
linux-azure Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-1029.31~18.04.1)
	disco	Ignored (reached end-of-life)
	eoan	Released (5.3.0-1013.14)
	focal	Not vulnerable (5.4.0-1006.6)
	precise	Does not exist
	trusty	Ignored (was needs-triage ESM criteria)
	upstream	Released (5.5~rc1)
	xenial	Not vulnerable (4.11.0-1009.9)
linux-azure-4.15 Launchpad, Ubuntu, Debian	bionic	Not vulnerable
	eoan	Does not exist
	focal	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Needs triage
	xenial	Does not exist
linux-azure-5.3 Launchpad, Ubuntu, Debian	bionic	Released (5.3.0-1013.14~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Does not exist
linux-azure-edge Launchpad, Ubuntu, Debian	bionic	Ignored (was needs-triage now end-of-life)
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Does not exist
linux-gcp Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-1029.30~18.04.1)
	disco	Ignored (reached end-of-life)
	eoan	Released (5.3.0-1012.13)
	focal	Not vulnerable (5.4.0-1005.5)
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Not vulnerable (4.10.0-1004.4)
linux-gcp-5.3 Launchpad, Ubuntu, Debian	bionic	Released (5.3.0-1012.13~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Does not exist
linux-gcp-edge Launchpad, Ubuntu, Debian	bionic	Ignored (was needs-triage now end-of-life)
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Does not exist
linux-gke-4.15 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1030.32)
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Does not exist
linux-gke-5.0 Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-1029.30~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Does not exist
linux-gke-5.3 Launchpad, Ubuntu, Debian	bionic	Released (5.3.0-1012.13~18.04.1)
	eoan	Does not exist
	focal	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Does not exist
linux-hwe Launchpad, Ubuntu, Debian	bionic	Released (5.3.0-40.32~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Not vulnerable (4.8.0-36.36~16.04.1)
linux-hwe-edge Launchpad, Ubuntu, Debian	bionic	Ignored (was needed now end-of-life)
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Ignored (was needs-triage now end-of-life)
linux-kvm Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1002.2)
	disco	Ignored (reached end-of-life)
	eoan	Released (5.3.0-1010.11)
	focal	Not vulnerable (5.4.0-1004.4)
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Not vulnerable (4.4.0-1004.9)
linux-lts-trusty Launchpad, Ubuntu, Debian	bionic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	precise	Ignored (was needs-triage ESM criteria)
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	bionic	Does not exist
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	precise	Does not exist
	trusty	Ignored (was needs-triage ESM criteria)
	upstream	Released (5.5~rc1)
	xenial	Does not exist
linux-oem Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1002.3)
	disco	Not vulnerable (4.15.0-1021.24)
	eoan	Not vulnerable (4.15.0-1035.40)
	focal	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Ignored (was needs-triage now end-of-life)
linux-oem-5.6 Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Does not exist
	focal	Not vulnerable (5.6.0-1007.7)
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Does not exist
linux-oem-osp1 Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-1037.42)
	disco	Ignored (reached end-of-life)
	eoan	Released (5.0.0-1037.42)
	focal	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Does not exist
linux-oracle Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1007.9)
	disco	Ignored (reached end-of-life)
	eoan	Released (5.3.0-1009.10)
	focal	Not vulnerable (5.4.0-1005.5)
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Not vulnerable (4.15.0-1007.9~16.04.1)
linux-oracle-5.0 Launchpad, Ubuntu, Debian	bionic	Released (5.0.0-1010.15~18.04.1)
	disco	Does not exist
	eoan	Does not exist
	focal	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Does not exist
linux-oracle-5.3 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.3.0-1011.12~18.04.1)
	eoan	Does not exist
	focal	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Does not exist
linux-raspi Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Does not exist
	focal	Not vulnerable (5.4.0-1007.7)
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Does not exist
linux-raspi2 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.13.0-1005.5)
	disco	Ignored (reached end-of-life)
	eoan	Released (5.3.0-1018.20)
	focal	Ignored (was needed now end-of-life)
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Not vulnerable (4.2.0-1013.19)
linux-raspi2-5.3 Launchpad, Ubuntu, Debian	bionic	Released (5.3.0-1018.20~18.04.1)
	eoan	Does not exist
	focal	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Does not exist
linux-riscv Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Does not exist
	focal	Not vulnerable (5.4.0-24.28)
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Does not exist
linux-snapdragon Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.4.0-1077.82)
	disco	Ignored (reached end-of-life)
	eoan	Does not exist
	focal	Does not exist
	precise	Does not exist
	trusty	Does not exist
	upstream	Released (5.5~rc1)
	xenial	Not vulnerable (4.4.0-1012.12)

Severity score breakdown

Parameter	Value
Base score	7.5
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

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