CVE-2021-21431
In versions prior to 2.0.1, on some IRC servers, restrictions around the removal of the bot using the kick/kickban command could be bypassed when kicking multiple users at once.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.08%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
sopel-channelmgnt is a channelmgnt plugin for sopel. In versions prior to 2.0.1, on some IRC servers, restrictions around the removal of the bot using the kick/kickban command could be bypassed when kicking multiple users at once. We also believe it may have been possible to remove users from other channels but due to the wonder that is IRC and following RfCs, We have no POC for that. Freenode is not affected. This is fixed in version 2.0.1. As a workaround, do not use this plugin on networks where TARGMAX > 1.
- CVSS 3.1
- 8.1 HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:N/I:H/A:H
- EPSS
- 1.08% probability · 63th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20, CWE-284
- Affected
- mirahezebots/channelmgnt
- Source
- security-advisories@github.com
References
- https://github.com/MirahezeBots/sopel-channelmgnt/commit/7c96d400358221e59135f0a0be0744f3fad73856Patch, Third Party Advisory
- https://github.com/MirahezeBots/sopel-channelmgnt/security/advisories/GHSA-23c7-6444-399mThird Party Advisory
- https://pypi.org/project/sopel-plugins.channelmgnt/Product, Third Party Advisory
- https://github.com/MirahezeBots/sopel-channelmgnt/commit/7c96d400358221e59135f0a0be0744f3fad73856Patch, Third Party Advisory
- https://github.com/MirahezeBots/sopel-channelmgnt/security/advisories/GHSA-23c7-6444-399mThird Party Advisory
- https://pypi.org/project/sopel-plugins.channelmgnt/Product, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.