CVE-2021-4406
An authenticated attacker is able to create alerts that trigger a stored XSS attack.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.96%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
An authenticated attacker is able to create alerts that trigger a stored XSS attack. POC * go to the alert manager * open the ITSM tab * add a webhook with the URL/service token value ' -h && id | tee /tmp/ttttttddddssss #' (whitespaces are tab characters) * click add * click apply * create a test alert * The test alert will run the command “id | tee /tmp/ttttttddddssss” as root. * after the test alert inspect /tmp/ttttttddddssss it'll contain the ids of the root user.
- CVSS 3.1
- 7.2 HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.96% probability · 60th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-77
- Affected
- osnexus/quantastor
- Source
- csirt@divd.nl
References
- https://csirt.divd.nl/CVE-2021-4406Third Party Advisory
- https://csirt.divd.nl/DIVD-2021-00020/
- https://www.osnexus.com/products/software-defined-storageProduct
- https://csirt.divd.nl/CVE-2021-4406Third Party Advisory
- https://www.divd.nl/DIVD-2021-00020
- https://www.osnexus.com/products/software-defined-storageProduct
- https://csirt.divd.nl/cves/CVE-2021-4406/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.