CVE-2003-0567
Cisco IOS 11.x and 12.0 through 12.2 allows remote attackers to cause a denial of service (traffic block) by sending a particular sequence…
- 7.8HighCVSS base score
- 16.6%Exploitation in 30 daysEPSS · top 3.0% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 3Public exploitsMetasploit, Nuclei and Exploit-DB
Description
Cisco IOS 11.x and 12.0 through 12.2 allows remote attackers to cause a denial of service (traffic block) by sending a particular sequence of IPv4 packets to an interface on the device, causing the input queue on that interface to be marked as full.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list 3 Exploit-DB entries for it.
Show the exploits3
Exploit-DB3 entries
- Cisco IOS - using hping Remote Denial of Service (Exploit-DB entry) (opens in a new tab)
EDB-ID 62dos, hardwarepublished 22 Jul 2003Verified
- Cisco IOS - 'cisco-bug-44020.c' IPv4 Packet Denial of Service (Exploit-DB entry) (opens in a new tab)
EDB-ID 60dos, hardwarepublished 21 Jul 2003Verified
- Cisco IOS - IPv4 Packets Denial of Service (Exploit-DB entry) (opens in a new tab)
EDB-ID 59dos, hardwarepublished 18 Jul 2003Verified
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By mitre
- 9 days later
· 9 days later
Published
- 21 years later
· 21 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | High7.8 | AV:N/AC:L/Au:N/C:N/I:N/A:C |
- EPSS (exploitation in 30 days)
- 16.6% · top 3.0% of all CVEs (9 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
n/a
- affected n/a
References
6
- VU#411332 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
- oval:org.mitre.oval:def:5603 (opens in a new tab)vdb-entrysignaturex_refsource_OVALx_transferred
- CA-2003-17 (opens in a new tab)third-party-advisoryx_refsource_CERTx_transferred
- 20030717 IOS Interface Blocked by IPv4 Packet (opens in a new tab)vendor-advisoryx_refsource_CISCOx_transferred
- CA-2003-15 (opens in a new tab)third-party-advisoryx_refsource_CERTx_transferred
- 20030718 (no subject) (opens in a new tab)mailing-listx_refsource_FULLDISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2003-0561 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2003-0567)Record last updated .