CVE-2020-7040 - Improper Link Resolution Before File Access ('Link Following')

Severity

81%

Complexity

22%

Confidentiality

98%

storeBackup.pl in storeBackup through 3.5 relies on the /tmp/storeBackup.lock pathname, which allows symlink attacks that possibly lead to privilege escalation. (Local users can also create a plain file named /tmp/storeBackup.lock to block use of storeBackup until an admin manually deletes that file.)

storeBackup.pl in storeBackup through 3.5 relies on the /tmp/storeBackup.lock pathname, which allows symlink attacks that possibly lead to privilege escalation. (Local users can also create a plain file named /tmp/storeBackup.lock to block use of storeBackup until an admin manually deletes that file.)

CVSS 3.1 Base Score 8.1. CVSS Attack Vector: network. CVSS Attack Complexity: high. CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 9.3. CVSS Attack Vector: network. CVSS Attack Complexity: medium. CVSS Vector: (AV:N/AC:M/Au:N/C:C/I:C/A:C).

Overview

First reported 5 years ago

2020-01-21 21:15:00

Last updated 4 years ago

2020-09-17 23:15:00

Affected Software

Debian Linux 8.0 (Jessie)

8.0

OpenSUSE Backports SLE 15.0

15.0

OpenSUSE Backports SLE 15.0 Service Pack 1

15.0

OpenSUSE Leap 15.1

15.1

References

openSUSE-SU-2020:0119

Mailing List, Patch, Third Party Advisory

http://www.openwall.com/lists/oss-security/2020/01/20/3

Mailing List, Third Party Advisory

[oss-security] 20200121 Re: CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock

Mailing List, Third Party Advisory

[oss-security] 20200122 Re: CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock

Mailing List, Third Party Advisory

[oss-security] 20200122 Re: CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock

Mailing List, Third Party Advisory

[oss-security] 20200123 Re: CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock

Mailing List, Third Party Advisory

https://bugzilla.suse.com/show_bug.cgi?id=CVE-2020-7040

Issue Tracking, Third Party Advisory

[debian-lts-announce] 20200205 [SECURITY] [DLA 2095-1] storebackup security update

Mailing List, Third Party Advisory

[oss-security] CVE-2020-7040: storeBackup: denial of service and symlink attack vector via fixed lockfile path /tmp/storeBackup.lock

Mailing List, Third Party Advisory

USN-4508-1

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