Vulnerability Name:

CVE-2021-44052 (CCN-225867)

Assigned:2021-11-19
Published:2022-05-05
Updated:2022-05-13
Summary: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
CVSS v3 Severity:8.1 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N)
7.1 High (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): High
Availibility (A): None
6.5 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)
5.7 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): High
Integrity (I): None
Availibility (A): None
CVSS v2 Severity:5.5 Medium (CVSS v2 Vector: AV:N/AC:L/Au:S/C:P/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): None
6.8 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:S/C:C/I:N/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): Complete
Integrity (I): None
Availibility (A): None
Vulnerability Type:CWE-59
Vulnerability Consequences:File Manipulation
References:Source: MITRE
Type: CNA
CVE-2021-44052

Source: XF
Type: UNKNOWN
qnap-cve202144052-symlink(225867)

Source: CCN
Type: QSA-22-16
Multiple Vulnerabilities in QTS, QuTS hero, and QuTScloud

Source: MISC
Type: Vendor Advisory
https://www.qnap.com/en/security-advisory/qsa-22-16

Vulnerable Configuration:Configuration 1:
  • cpe:/o:qnap:quts_hero:*:*:*:*:*:*:*:* (Version < h4.5.4.1771)
  • OR cpe:/a:qnap:qts:*:*:*:*:*:*:*:* (Version >= 5.0.0.1716 and < 5.0.0.1986)
  • OR cpe:/a:qnap:qts:*:*:*:*:*:*:*:* (Version >= 4.4.0.0883 and < 4.5.4.1991)
  • OR cpe:/a:qnap:qts:*:*:*:*:*:*:*:* (Version >= 4.3.6.0895 and < 4.3.6.1965)
  • OR cpe:/a:qnap:qts:*:*:*:*:*:*:*:* (Version >= 4.3.4.0899 and < 4.3.4.1976)
  • OR cpe:/a:qnap:qts:*:*:*:*:*:*:*:* (Version >= 4.3.3.0174 and < 4.3.3.1945)
  • OR cpe:/a:qnap:qts:4.2.6:build_20170517:*:*:*:*:*:*
  • OR cpe:/a:qnap:qts:4.2.6:build_20190322:*:*:*:*:*:*
  • OR cpe:/a:qnap:qts:4.2.6:build_20190730:*:*:*:*:*:*
  • OR cpe:/a:qnap:qts:4.2.6:build_20190921:*:*:*:*:*:*
  • OR cpe:/a:qnap:qts:4.2.6:build_20191107:*:*:*:*:*:*
  • OR cpe:/a:qnap:qts:4.2.6:build_20200109:*:*:*:*:*:*
  • OR cpe:/a:qnap:qts:4.2.6:build_20200421:*:*:*:*:*:*
  • OR cpe:/a:qnap:qts:4.2.6:build_20200611:*:*:*:*:*:*
  • OR cpe:/a:qnap:qts:4.2.6:build_20200821:*:*:*:*:*:*
  • OR cpe:/a:qnap:qts:4.2.6:build_20210327:*:*:*:*:*:*
  • OR cpe:/a:qnap:qts:4.2.6:build_20211215:*:*:*:*:*:*
  • OR cpe:/o:qnap:quts_hero:*:*:*:*:*:*:*:* (Version >= h5.0.0.1772 and < h5.0.0.1986)
  • OR cpe:/o:qnap:qutscloud:*:*:*:*:*:*:*:* (Version < c5.0.1.1998)

    • Configuration CCN 1:
  • cpe:/a:qnap:qts:*:*:*:*:*:*:*:*
  • OR cpe:/o:qnap:quts_hero:-:*:*:*:*:*:*:*
  • OR cpe:/o:qnap:qutscloud:*:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    BACK
    qnap quts hero *
    qnap qts *
    qnap qts *
    qnap qts *
    qnap qts *
    qnap qts *
    qnap qts 4.2.6 build_20170517
    qnap qts 4.2.6 build_20190322
    qnap qts 4.2.6 build_20190730
    qnap qts 4.2.6 build_20190921
    qnap qts 4.2.6 build_20191107
    qnap qts 4.2.6 build_20200109
    qnap qts 4.2.6 build_20200421
    qnap qts 4.2.6 build_20200611
    qnap qts 4.2.6 build_20200821
    qnap qts 4.2.6 build_20210327
    qnap qts 4.2.6 build_20211215
    qnap quts hero *
    qnap qutscloud *
    qnap qts *
    qnap quts hero -
    qnap qutscloud *