CVE-2022-24751
Starting with version 4.0 and prior to version 4.11, Zulip is vulnerable to a race condition during account deactivation, where a simultaneous access by the user being deactivated may, in rare cases, allow continued access by the deactivated user.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.95%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
Zulip is an open source group chat application. Starting with version 4.0 and prior to version 4.11, Zulip is vulnerable to a race condition during account deactivation, where a simultaneous access by the user being deactivated may, in rare cases, allow continued access by the deactivated user. A patch is available in version 4.11 on the 4.x branch and version 5.0-rc1 on the 5.x branch. Upgrading to a fixed version will, as a side effect, deactivate any cached sessions that may have been leaked through this bug. There are currently no known workarounds.
- CVSS 3.1
- 7.4 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 0.95% probability · 59th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-362
- Affected
- zulip/zulip
- Source
- security-advisories@github.com
References
- https://github.com/zulip/zulip/commit/62ba8e455d8f460001d9fb486a6dabfd1ed67717Patch, Third Party Advisory
- https://github.com/zulip/zulip/commit/e6eace307ef435eec3395c99247155efed9219e4Patch, Third Party Advisory
- https://github.com/zulip/zulip/security/advisories/GHSA-6v98-m5x5-phqjThird Party Advisory
- https://github.com/zulip/zulip/commit/62ba8e455d8f460001d9fb486a6dabfd1ed67717Patch, Third Party Advisory
- https://github.com/zulip/zulip/commit/e6eace307ef435eec3395c99247155efed9219e4Patch, Third Party Advisory
- https://github.com/zulip/zulip/security/advisories/GHSA-6v98-m5x5-phqjThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.