CVE-2018-19854

04.12.2018, 16:29

An issue was discovered in the Linux kernel before 4.19.3. crypto_report_one() and related functions in crypto/crypto_user.c (the crypto user configuration API) do not fully initialize structures that are copied to userspace, potentially leaking sensitive memory to user programs. NOTE: this is a CVE-2013-2547 regression but with easier exploitability because the attacker does not need a capability (however, the system must have the CONFIG_CRYPTO_USER kconfig option).

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	4.7 MEDIUM	LOCAL	HIGH	LOW	CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
mitre	CNA	---				---
CVE	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: 26%

Vendor	Product	Version
linux	linux_kernel	𝑥 < 4.19.3
canonical	ubuntu_linux	14.04
canonical	ubuntu_linux	16.04
canonical	ubuntu_linux	18.04
canonical	ubuntu_linux	18.10

𝑥

= Vulnerable software versions

Debian Releases

Debian Product

Codename

linux

bullseye	5.10.223-1 fixed
stretch	not-affected
jessie	not-affected
bullseye (security)	5.10.226-1 fixed
bookworm	6.1.106-3 fixed
bookworm (security)	6.1.112-1 fixed
trixie	6.11.5-1 fixed
sid	6.11.6-1 fixed

Ubuntu Releases

Ubuntu Product

Codename

linux

cosmic	Fixed 4.18.0-14.15 released
bionic	Fixed 4.15.0-46.49 released
xenial	not-affected
trusty	not-affected

linux-aws

cosmic	Fixed 4.18.0-1008.10 released
bionic	Fixed 4.15.0-1033.35 released
xenial	not-affected
trusty	not-affected

linux-aws-hwe

cosmic	dne
bionic	dne
xenial	Fixed 4.15.0-1033.35~16.04.1 released
trusty	dne

linux-azure

cosmic	Fixed 4.18.0-1008.8 released
bionic	Fixed 4.18.0-1011.11~18.04.1 released
xenial	Fixed 4.15.0-1040.44 released
trusty	Fixed 4.15.0-1040.44~14.04.1 released

linux-azure-edge

cosmic	dne
bionic	Fixed 4.18.0-1011.11~18.04.1 released
xenial	Fixed 4.15.0-1040.44 released
trusty	dne

linux-euclid

cosmic	dne
bionic	dne
xenial	ignored
trusty	dne

linux-flo

cosmic	dne
bionic	dne
xenial	ignored
trusty	dne

linux-gcp

cosmic	Fixed 4.18.0-1006.7 released
bionic	Fixed 4.15.0-1028.29 released
xenial	Fixed 4.15.0-1028.29~16.04.1 released
trusty	dne

linux-gcp-edge

cosmic	dne
bionic	Fixed 4.18.0-1006.7~18.04.1 released
xenial	dne
trusty	dne

linux-gke

cosmic	dne
bionic	dne
xenial	ignored
trusty	dne

linux-goldfish

cosmic	dne
bionic	dne
xenial	ignored
trusty	dne

linux-grouper

cosmic	dne
bionic	dne
xenial	dne
trusty	dne

linux-hwe

cosmic	dne
bionic	Fixed 4.18.0-14.15~18.04.1 released
xenial	Fixed 4.15.0-46.49~16.04.1 released
trusty	dne

linux-hwe-edge

cosmic	dne
bionic	not-affected
xenial	Fixed 4.15.0-46.49~16.04.1 released
trusty	dne

linux-kvm

cosmic	Fixed 4.18.0-1007.7 released
bionic	Fixed 4.15.0-1030.30 released
xenial	not-affected
trusty	dne

linux-lts-trusty

cosmic	dne
bionic	dne
xenial	dne
trusty	dne

linux-lts-utopic

cosmic	dne
bionic	dne
xenial	dne
trusty	dne

linux-lts-vivid

cosmic	dne
bionic	dne
xenial	dne
trusty	dne

linux-lts-wily

cosmic	dne
bionic	dne
xenial	dne
trusty	dne

linux-lts-xenial

cosmic	dne
bionic	dne
xenial	dne
trusty	not-affected

linux-maguro

cosmic	dne
bionic	dne
xenial	dne
trusty	dne

linux-mako

cosmic	dne
bionic	dne
xenial	ignored
trusty	dne

linux-manta

cosmic	dne
bionic	dne
xenial	dne
trusty	dne

linux-oem

cosmic	Fixed 4.15.0-1034.39 released
bionic	Fixed 4.15.0-1034.39 released
xenial	ignored
trusty	dne

linux-oracle

cosmic	not-affected
bionic	Fixed 4.15.0-1009.11 released
xenial	Fixed 4.15.0-1009.11~16.04.1 released
trusty	dne

linux-raspi2

cosmic	Fixed 4.18.0-1009.11 released
bionic	Fixed 4.15.0-1032.34 released
xenial	not-affected
trusty	dne

linux-snapdragon

cosmic	dne
bionic	not-affected
xenial	not-affected
trusty	dne

Common Weakness Enumeration

CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f43f39958beb206b53292801e216d9b8a660f087

https://access.redhat.com/errata/RHSA-2019:3309

https://access.redhat.com/errata/RHSA-2019:3517

https://github.com/torvalds/linux/commit/f43f39958beb206b53292801e216d9b8a660f087

https://kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.3

https://usn.ubuntu.com/3872-1/

https://usn.ubuntu.com/3878-1/

https://usn.ubuntu.com/3878-2/

https://usn.ubuntu.com/3901-1/

https://usn.ubuntu.com/3901-2/