PT-2020-8698 · Ecryptfs+1 · Ecryptfs+1

Published 2020-04-08 · Updated 2023-02-11 · CVE-2018-21054

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Samsung mobile devices with M(6.0) except MSM8909 SC77xx/9830 exynos3470/5420 Samsung mobile devices with N(7.0) except MSM8939 Samsung mobile devices with N(7.1) except MSM8996 SDM6xx/M6737T Samsung mobile devices with N(7.x) except exynos9610/9820 Samsung mobile devices with O(8.x) except exynos9610/9820

Description An issue was discovered in Samsung mobile devices, where there is an integer underflow with a resultant buffer overflow in eCryptFS.

Recommendations For Samsung mobile devices with M(6.0) except MSM8909 SC77xx/9830 exynos3470/5420, consider disabling the use of eCryptFS until a patch is available. For Samsung mobile devices with N(7.0) except MSM8939, restrict access to eCryptFS to minimize the risk of exploitation. For Samsung mobile devices with N(7.1) except MSM8996 SDM6xx/M6737T, avoid using eCryptFS in sensitive operations until the issue is resolved. For Samsung mobile devices with N(7.x) except exynos9610/9820, and O(8.x) except exynos9610/9820, apply configuration changes to limit the impact of the buffer overflow in eCryptFS. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

CVE-2018-21054

Affected Products

Samsung Mobile Devices

Ecryptfs

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2018-21054 · Security Note
• https://security.samsungmobile.com/securityUpdate.smsb · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-21054 · Vendor Advisory
• https://t.me/cibsecurity/11182 · Telegram Post