CVE-2020-14382

Katalog CVE

CVSS 7.8 · High EPSS 1,2%

Kerentanan Out-of-bounds Write pada cryptsetup project cryptsetup, redhat enterprise linux +2 lainnya. Skor CVSS 3.1 7.8 (High) menurut NVD.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

16 September 2020

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

7.8 (High), sumber NVD
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-787: Out-of-bounds Write

EPSS (30 hari)

1,2% peluang dieksploitasi; lebih tinggi dari 66,2% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://bugzilla.redhat.com/show_bug.cgi?id=1874712 issue tracking · patch · advisory pihak ketiga
• https://usn.ubuntu.com/4493-1/ advisory pihak ketiga
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OJTQ4KSVCW2NM...
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TD6YSD63LLRRC...