CVE-2018-19854 Information

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).

CVSS Vector

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

Reference

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/

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

NONE

Base Severity

4.7