title: Arbitrary file read
description: An improper link resolution before file access ('Link Following') vulnerability has been reported to affect QNAP device running QuTScloud, QuTS hero, and QTS. If exploited, this vulnerability allows remote attackers to traverse the file system to unintended locations and read or overwrite the contents of unexpected files. We have already fixed this vulnerability in the following versions of QuTScloud, QuTS hero, and QTS: QuTScloud c5.0.1.1998 and later QuTS hero h4.5.4.1971 build 20220310 and later QuTS hero h5.0.0.1986 build 20220324 and later QTS 4.3.4.1976 build 20220303 and later QTS 4.3.3.1945 build 20220303 and later QTS 4.2.6 build 20220304 and later QTS 4.3.6.1965 build 20220302 and later QTS 5.0.0.1986 build 20220324 and later QTS 4.5.4.1991 build 20220329 and later
problem types: CWE-59
affected:
{
product: QuTScloud
vendor: QNAP Systems Inc.
versions:
lessThan: c5.0.1.1998, status: affected, version: unspecified, versionType: custom
}
{
product: QuTS hero
vendor: QNAP Systems Inc.
versions:
lessThan: h4.5.4.1971 build 20220310, status: affected, version: unspecified, versionType: custom
lessThan: h5.0.0.1986 build 20220324, status: affected, version: unspecified, versionType: custom
}
{
product: QTS
vendor: QNAP Systems Inc.
versions:
lessThan: 4.3.4.1976 build 20220303, status: affected, version: unspecified, versionType: custom
lessThan: 4.3.3.1945 build 20220303, status: affected, version: unspecified, versionType: custom
lessThan: 4.2.6 build 20220304, status: affected, version: unspecified, versionType: custom
lessThan: 4.3.6.1965 build 20220302, status: affected, version: unspecified, versionType: custom
lessThan: 5.0.0.1986 build 20220324, status: affected, version: unspecified, versionType: custom
lessThan: 4.5.4.1991 build 20220329, status: affected, version: unspecified, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 6.5
baseSeverity: MEDIUM
confidentialityImpact: HIGH
integrityImpact: NONE
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
version: 3.1
]
solutions: We have already fixed this vulnerability in the following versions of QuTScloud, QuTS hero, and QTS:
QuTScloud c5.0.1.1998 and later
QuTS hero h4.5.4.1971 build 20220310 and later
QuTS hero h5.0.0.1986 build 20220324 and later
QTS 4.3.4.1976 build 20220303 and later
QTS 4.3.3.1945 build 20220303 and later
QTS 4.2.6 build 20220304 and later
QTS 4.3.6.1965 build 20220302 and later
QTS 5.0.0.1986 build 20220324 and later
QTS 4.5.4.1991 build 20220329 and later