CVE-2021-39392
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.26%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 2.26% probability · 82th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-502
- Affected
- mylittletools/mylittlebackup
- Source
- cve@mitre.org
References
- http://www.mylittlebackup.com/mlb/zip/mlb_1.7.zipBroken Link
- https://gist.github.com/omriinbar/65827626e63f15e3e50557e2d9d61281Third Party Advisory
- http://www.mylittlebackup.com/mlb/zip/mlb_1.7.zipBroken Link
- https://gist.github.com/omriinbar/65827626e63f15e3e50557e2d9d61281Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.