CVE catalog
CVE-2021-21439
znuny: CVE-2021-21439
- Severity
- Low
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.88% · Oct 27, 2026
DoS attack can be performed when an email contains specially designed URL in the body. It can lead to the high CPU usage and cause low quality of service, or in extreme case bring the system to a halt. This issue affects: OTRS AG ((OTRS)) Community Edition 6.0.x version 6.0.1 and later versions. OTRS AG OTRS 7.0.x version 7.0.26 and prior versions; 8.0.x version 8.0.13 and prior versions.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | znuny | sid | 6.5.26-1 | not affected |
| Debian | znuny | forky | 6.5.26-1 | not affected |
| Debian | znuny | trixie | 6.5.15-2 | not affected |
| Debian | znuny | bookworm | 6.5.1-1 | not affected |
| Ubuntu | otrs2 | 16.04 | 4.0.10-1 | vulnerable |
| Ubuntu | otrs2 | 16.04 | 5.0.1-1 | vulnerable |
| Ubuntu | otrs2 | 16.04 | 5.0.1-2 | vulnerable |
| Ubuntu | otrs2 | 16.04 | 5.0.2-1 | vulnerable |
| Ubuntu | otrs2 | 16.04 | 5.0.3-1 | vulnerable |
| Ubuntu | otrs2 | 16.04 | 5.0.5-1 | vulnerable |
| Ubuntu | otrs2 | 16.04 | 5.0.6-1 | vulnerable |
| Ubuntu | otrs2 | 16.04 | 5.0.7-1 | vulnerable |
| Ubuntu | otrs2 | 18.04 | 5.0.23-1 | vulnerable |
| Ubuntu | otrs2 | 18.04 | 5.0.24-1 | vulnerable |
| Ubuntu | otrs2 | 18.04 | 6.0.1-1 | vulnerable |
| Ubuntu | otrs2 | 18.04 | 6.0.2-1 | vulnerable |
| Ubuntu | otrs2 | 18.04 | 6.0.3-1 | vulnerable |
| Ubuntu | otrs2 | 18.04 | 6.0.4-1 | vulnerable |
| Ubuntu | otrs2 | 18.04 | 6.0.5-1 | vulnerable |
| Ubuntu | otrs2 | 20.04 | 6.0.20-1 | vulnerable |
| Ubuntu | otrs2 | 20.04 | 6.0.23-2 | vulnerable |
| Ubuntu | otrs2 | 20.04 | 6.0.24-1 | vulnerable |
| Ubuntu | otrs2 | 20.04 | 6.0.25-1 | vulnerable |
| Ubuntu | otrs2 | 20.04 | 6.0.25-2 | vulnerable |
| Ubuntu | otrs2 | 20.04 | 6.0.25-3 | vulnerable |
| Ubuntu | otrs2 | 20.04 | 6.0.26-1 | vulnerable |
| Ubuntu | otrs2 | 22.04 | 6.0.32-6 | vulnerable |
| Ubuntu | otrs2 | 22.04 | 6.1.2-1 | vulnerable |
| Ubuntu | otrs2 | 22.04 | 6.2.1-1 | vulnerable |
| Ubuntu | otrs2 | 22.04 | 6.2.2-2 | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | znuny | source | sid | Not affected | unimportant | Not reported | Not reported |
| Debian | znuny | source | forky | Not affected | unimportant | Not reported | Not reported |
| Debian | znuny | source | trixie | Not affected | unimportant | Not reported | Not reported |
| Debian | znuny | source | bookworm | Not affected | unimportant | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
Observed:
References
- [https://osv.dev/vulnerability/DEBIAN-CVE-2021-21439]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2021-21439]
- [https://security-tracker.debian.org/tracker/CVE-2021-21439]
- [https://wid.cert-bund.de/.well-known/csaf/white/2021/wid-sec-w-2023-2219.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database]