CVE-2018-19854

low-risk

Published 2018-12-04

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).

Do I need to act?

0.05% chance of exploitation

EPSS score — low exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 4.7/10 Medium

LOCAL / HIGH complexity

Affected Products (5)

Linux Kernel

Ubuntu Linux

Affected Vendors

Linux Canonical

References (20)

Patch http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f43f39...

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

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

Patch https://github.com/torvalds/linux/commit/f43f39958beb206b53292801e216d9b8a660f08...

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

Third Party Advisory https://usn.ubuntu.com/3872-1/

Third Party Advisory https://usn.ubuntu.com/3878-1/

Third Party Advisory https://usn.ubuntu.com/3878-2/

Third Party Advisory https://usn.ubuntu.com/3901-1/

Third Party Advisory https://usn.ubuntu.com/3901-2/