CVE-2018-19854

LOW

Description

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).

References

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

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/

Details

Source: MITRE

Published: 2018-12-04

Updated: 2019-03-08

Type: CWE-200

Risk Information

CVSS v2.0

Base Score: 1.9

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

Impact Score: 2.9

Exploitability Score: 3.4

Severity: LOW

CVSS v3.0

Base Score: 4.7

Vector: CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Impact Score: 3.6

Exploitability Score: 1

Severity: MEDIUM