PatchTheCVECVE-2003-0321: Multiple buffer overflows in BitchX IRC client 1.0-0c19 and earlier allow remote malicious IRC servers to caus
CVE-2003-0321 is a high-severity flaw (CVSS 7.5) affecting bitchx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Multiple buffer overflows in BitchX IRC client 1.0-0c19 and earlier allow remote malicious IRC servers to cause a denial of service (crash) and possibly execute arbitrary code via long hostnames, nicknames, or channel names, which are not properly handled by the functions (1) send_ctcp, (2) cannot_join_channel, (3) cluster, (4) BX_compress_modes, (5) handle_oper_vision, and (6) ban_it.
Why this priority
- High severity
- EPSS top 9%: very likely to be exploited
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| EPSS exploit chance | 4.2% (top 9%) |
| CISA exploited list | No |
| Published | 2003-06-09 |
| Last modified | 2026-06-16 |
Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2003-0321?
bitchx: upgrade to newer than 1.0.0c19. Exact commands for each OS are on this page.
Is CVE-2003-0321 being exploited?
CVE-2003-0321 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2003-0321 affect?
CVE-2003-0321 affects bitchx. Severity is high (CVSS 7.5). Multiple buffer overflows in BitchX IRC client 1.0-0c19 and earlier allow remote malicious IRC servers to cause a denial of service (crash) and possibly execute arbitrary code via long hostnames, nicknames, or channel names, which are not p
How urgent is CVE-2003-0321?
Priority 49/100. High severity; EPSS top 9%: very likely to be exploited
Related CVEs
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- CVE-2007-4584 HIGH 10.0 DOWNGRADE Stack-based buffer overflow in BitchX 1.1 Final allows remote IRC servers to execute arbitrary code via a long
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