PT-2018-2587 · Linux+5 · Linux Kernel+5
Published
2018-11-03
·
Updated
2019-11-06
·
CVE-2018-19854
CVSS v3.1
4.7
Medium
| Vector | AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 4.19.3
Description
The issue is related to the crypto user configuration API in the Linux kernel, specifically with the
crypto report one() function and related functions in crypto/crypto user.c. These functions do not fully initialize structures that are copied to userspace, potentially leaking sensitive memory to user programs. This could allow an attacker to gain unauthorized access to protected information. The system must have the CONFIG CRYPTO USER kconfig option for this issue to be exploitable.Recommendations
For Linux kernel versions prior to 4.19.3, update to version 4.19.3 or later to resolve the issue. As a temporary workaround, consider disabling the
crypto report one() function and related functions in crypto/crypto user.c until a patch is available. Restrict access to the crypto user configuration API to minimize the risk of exploitation.Fix
Information Disclosure
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Centos
Linux Kernel
Red Hat
Suse
Ubuntu