CVE-2021-36356
CriticalExploitedPublic exploitKRAMER VIAware through August 2021 allows remote attackers to execute arbitrary code because ajaxPages/writeBrowseFilePathAjax.php accepts arbitrary executable pathnames (even though browseSystemFiles.php is no longer reachable via the GUI).
Published Aug 31, 2021 · Updated Nov 21, 2024
Key Facts
Patch immediately- CVE-2021-36356 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Viaware (Kramerav).
- It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since May 26, 2022. Public exploit code is available.
- EPSS estimates a 54% probability of exploitation in the next 30 days.
- Fixed versions are available, including Viaware <=2021-08, Viaware 2021-08.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
54%
Higher than 99.0% of all scored CVEs
Exploited in the wild
Yes
2 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
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Description
KRAMER VIAware through August 2021 allows remote attackers to execute arbitrary code because ajaxPages/writeBrowseFilePathAjax.php accepts arbitrary executable pathnames (even though browseSystemFiles.php is no longer reachable via the GUI). NOTE: this issue exists because of an incomplete fix for CVE-2019-17124.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | May 26, 2022 | n/a | Not reported |
| CIRCL KEV | Oct 14, 2023 | n/a | Not reported |
Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| ViawareKramerav | See advisory | 2021-08 |
Patched Releases
Viaware
<=2021-08
Timeline
Publicly disclosed
Aug 31, 2021
Added to Industry KEV feed
May 26, 2022
Added to CIRCL KEV
Oct 14, 2023
Last updated
Nov 21, 2024
Weakness Type
- CWE-434 Unrestricted Upload of File with Dangerous Type
References
- advisoryhttps://write-up.github.io/kramerav/
- exploithttp://packetstormsecurity.com/files/166623/Kramer-VIAware-Remote-Code-Execution.html
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
- exploitVulnCheck exploitation report
FAQ
Common Questions.
KRAMER VIAware through August 2021 allows remote attackers to execute arbitrary code because ajaxPages/writeBrowseFilePathAjax.php accepts arbitrary executable pathnames (even though browseSystemFiles.php is no longer reachable via the GUI).
Affected: Viaware (Kramerav). The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since May 26, 2022.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Viaware <=2021-08, Viaware 2021-08.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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