CVE-2003-0567 in the critical feed json
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…
published 2003-07-25 23 y ago modified 2026-06-16 4 mo ago also EUVD-2003-0561
- cvss
- 7.8
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 16.6%
- EPSS 16.6% chance of exploitation in 30 days, percentile 97%
- public exploits
- 3
- Exploit-DB
Summary
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.
Patch / fix
- cert.org/advisories/CA-2003-17.html advisory
- cert.org/advisories/CA-2003-15.html advisory
Timeline
- First public exploit (EDB-59)
- Published
Exploit prediction
16.58% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-62 Cisco IOS - using hping Remote Denial of Service dos, 2003-07-22
- EDB-60 Cisco IOS - 'cisco-bug-44020.c' IPv4 Packet Denial of Service dos, 2003-07-21
- EDB-59 Cisco IOS - IPv4 Packets Denial of Service dos, 2003-07-18
- cert.org http://www.cert.org/advisories/CA-2003-17.html referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 7.8 | AV:N/AC:L/Au:N/C:N/I:N/A:C |
Classification
- Weakness
-
- CWE-20 Improper Input Validation
- Technology feeds
References
-
cert.org
/advisories/CA-2003-17.html
third-party-advisory, exploit, patch, us-government-resource
-
cert.org
/advisories/CA-2003-15.html
third-party-advisory, patch, us-government-resource
-
cisco.com
/warp/public/707/cisco-sa-20030717-blocked.shtml
vendor-advisory
-
kb.cert.org
/vuls/id/411332
third-party-advisory, us-government-resource
-
oval.cisecurity.org
/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5603
vdb-entry, signature
-
lists.grok.org.uk
/pipermail/full-disclosure/2003-July/006743.html
mailing-list
Sources
- CVE List CVE-2003-0567
- NVD CVE-2003-0567
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.