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archlinuxArchLinuxASA-202102-7
HistoryFeb 06, 2021 - 12:00 a.m.

[ASA-202102-7] nextcloud: directory traversal

2021-02-0600:00:00
security.archlinux.org
120

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

6.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

0.924 High

EPSS

Percentile

98.9%

JSON

Arch Linux Security Advisory ASA-202102-7

Severity: Medium
Date : 2021-02-06
CVE-ID : CVE-2020-36193
Package : nextcloud
Type : directory traversal
Remote : Yes
Link : https://security.archlinux.org/AVG-1464

Summary

The package nextcloud before version 20.0.6-1 is vulnerable to
directory traversal.

Resolution

Upgrade to 20.0.6-1.

pacman -Syu “nextcloud>=20.0.6-1”

The problem has been fixed upstream in version 20.0.6.

Workaround

None.

Description

Tar.php in Archive_Tar through 1.4.11 allows write operations with
Directory Traversal due to inadequate checking of symbolic links, a
related issue to CVE-2020-28948.

Impact

A remote attacker might be able to write files in arbitrary file system
locations by uploading a crafted archive file that leads to directory
traversal.

References

https://pear.php.net/bugs/bug.php?id=27008
https://github.com/pear/Archive_Tar/commit/cde460582ff389404b5b3ccb59374e9b389de916
https://github.com/nextcloud/3rdparty/commit/87062377878054f58d62f6b1853ed61664404de6
https://github.com/nextcloud/3rdparty/commit/4f95d388e0888c130316c2a21f160d553219ea48
https://security.archlinux.org/CVE-2020-36193

OSVersionArchitecturePackageVersionFilename
ArchLinuxanyanynextcloud< 20.0.6-1UNKNOWN

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7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

6.8 Medium

CVSS2

Access Vector

NETWORK

Access Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

0.924 High

EPSS

Percentile

98.9%

JSON
Related for ASA-202102-7
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