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MitreCVE-2021-39392

HistorySep 15, 2021 - 5:15 p.m.

CVE-2021-39392

2021-09-1517:15:10

CWE-502

mitre

web.nvd.nist.gov

cve-2021-39392

mylittlebackup

remote code execution

web.config

nvd

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

9.7

Confidence

High

EPSS

0.012

Percentile

85.3%

JSON

The management tool in MyLittleBackup up to and including 1.7 allows remote attackers to execute arbitrary code because machineKey is hardcoded (the same for all customers’ installations) in web.config, and can be used to send serialized ASP code.

Affected configurations

Nvd

Node

mylittletoolsmylittlebackupRange≤1.7

VendorProductVersionCPE
mylittletoolsmylittlebackup*cpe:2.3:a:mylittletools:mylittlebackup:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
mylittletools	mylittlebackup	*	cpe:2.3:a:mylittletools:mylittlebackup::::::::

References

www.mylittlebackup.com/mlb/zip/mlb_1.7.zip

gist.github.com/omriinbar/65827626e63f15e3e50557e2d9d61281

CVSS2

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

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

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

9.7

Confidence

High

EPSS

0.012

Percentile

85.3%

JSON

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