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).
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/
Source: MITRE
Published: 2018-12-04
Updated: 2019-11-06
Type: CWE-200
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
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