CVE-2020-14382

描述

A vulnerability was found in upstream release cryptsetup-2.2.0 where, there's a bug in LUKS2 format validation code, that is effectively invoked on every device/image presenting itself as LUKS2 container. The bug is in segments validation code in file 'lib/luks2/luks2_json_metadata.c' in function hdr_validate_segments(struct crypt_device *cd, json_object *hdr_jobj) where the code does not check for possible overflow on memory allocation used for intervals array (see statement "intervals = malloc(first_backup * sizeof(*intervals));"). Due to the bug, library can be *tricked* to expect such allocation was successful but for far less memory then originally expected. Later it may read data FROM image crafted by an attacker and actually write such data BEYOND allocated memory.

如何修補 CVE-2020-14382

要修補 CVE-2020-14382,請將受影響套件升級到下列已修補版本。

• —升級至 2.2.2-r1 或更新版本
• —升級至 2:2.3.4-1 或更新版本

CVE-2020-14382 正在被利用嗎?

低 — EPSS 為 1.2%,目前沒有觀察到大規模利用活動。

受影響套件(2)

• from 0, < 2.2.2-r1
• from 0, < 2:2.3.4-1

CVSS 分數

參考連結(2)

• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2020-14382
• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2020-14382