HIGH
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
Published Jul 25, 2003
7.8
HIGHCVSS 2.0
EPSS 16.58%
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.
Affected products
No data.
Configuration 1
OR
- 11.0
- 11.1
- 11.1aa
- 11.1ca
- 11.1cc
- 11.2
- 11.2p
- 11.2sa
- 11.3
- 11.3t
- 12.0
- 12.0da
- 12.0db
- 12.0dc
- 12.0s
- 12.0sc
- 12.0sl
- 12.0sp
- 12.0st
- 12.0sx
- 12.0sy
- 12.0sz
- 12.0t
- 12.0w5
- 12.0wc
- 12.0wt
- 12.0xa
- 12.0xb
- 12.0xc
- 12.0xd
- 12.0xe
- 12.0xf
- 12.0xg
- 12.0xh
- 12.0xi
- 12.0xj
- 12.0xk
- 12.0xl
- 12.0xm
- 12.0xn
- 12.0xp
- 12.0xq
- 12.0xr
- 12.0xs
- 12.0xu
- 12.0xv
- 12.0xw
- 12.1
- 12.1aa
- 12.1ax
- 12.1ay
- 12.1da
- 12.1db
- 12.1dc
- 12.1e
- 12.1ea
- 12.1eb
- 12.1ec
- 12.1ev
- 12.1ew
- 12.1ex
- 12.1ey
- 12.1m
- 12.1t
- 12.1xa
- 12.1xb
- 12.1xc
- 12.1xd
- 12.1xe
- 12.1xf
- 12.1xg
- 12.1xh
- 12.1xi
- 12.1xj
- 12.1xk
- 12.1xl
- 12.1xm
- 12.1xp
- 12.1xq
- 12.1xr
- 12.1xs
- 12.1xt
- 12.1xu
- 12.1xv
- 12.1xw
- 12.1xx
- 12.1xy
- 12.1xz
- 12.1yb
- 12.1yc
- 12.1yd
- 12.1ye
- 12.1yf
- 12.1yh
- 12.1yi
- 12.1yj
- 12.2
- 12.2b
- 12.2bc
- 12.2bw
- 12.2bx
- 12.2bz
- 12.2cx
- 12.2cy
- 12.2da
- 12.2dd
- 12.2dx
- 12.2ja
- 12.2mb
- 12.2mc
- 12.2mx
- 12.2s
- 12.2sx
- 12.2sy
- 12.2sz
- 12.2t
- 12.2xa
- 12.2xb
- 12.2xc
- 12.2xd
- 12.2xe
- 12.2xf
- 12.2xg
- 12.2xh
- 12.2xi
- 12.2xj
- 12.2xk
- 12.2xl
- 12.2xm
- 12.2xn
- 12.2xq
- 12.2xr
- 12.2xs
- 12.2xt
- 12.2xu
- 12.2xw
- 12.2ya
- 12.2yb
- 12.2yc
- 12.2yd
- 12.2yf
- 12.2yg
- 12.2yh
- 12.2yj
- 12.2yk
- 12.2yl
- 12.2ym
- 12.2yn
- 12.2yo
- 12.2yp
- 12.2yq
- 12.2yr
- 12.2ys
- 12.2yt
- 12.2yu
- 12.2yv
- 12.2yw
- 12.2yx
- 12.2yy
- 12.2yz
- 12.2za
- 12.2zb
- 12.2zc
- 12.2zd
- 12.2ze
- 12.2zf
- 12.2zg
- 12.2zh
- 12.2zj
Configuration 2
OR
- 3.0
- 3.1.0
- 3.2.0
- 3.3.0
- 3.4.0
- 4.0.0
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
7.8 HIGH NVD
AV:N/AC:L/Au:N/C:N/I:N/A:C
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
16.58% 0.16576
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.16576
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 16.58% (0.16576) | 96.92th | v5 (v2026.06.15) |
| Jun 15, 2026 | 16.58% (0.16576) | 96.59th | v5 (v2026.06.15) |
| Mar 30, 2025 | 24.63% (0.24634) | 95.67th | v4 (v2025.03.14) |
| Mar 29, 2025 | 20.78% (0.20777) | 92.83th | v4 (v2025.03.14) |
| Mar 17, 2025 | 21.79% (0.21789) | 95.29th | v4 (v2025.03.14) |
| Dec 12, 2024 | 80.69% (0.80695) | 98.45th | v3 (v2023.03.01) |
| Jan 3, 2024 | 79.90% (0.79903) | 98.02th | v3 (v2023.03.01) |
| Mar 7, 2023 | 82.01% (0.82010) | 97.78th | v3 (v2023.03.01) |
| Mar 6, 2023 | 6.79% (0.06790) | 92.15th | v2 (v2022.01.01) |
| Apr 1, 2022 | 6.79% (0.06790) | 91.41th | v2 (v2022.01.01) |
| Feb 4, 2022 | 6.79% (0.06790) | 79.54th | v2 (v2022.01.01) |
Weaknesses (1)
References (6)
- http://lists.grok.org.uk/pipermail/full-disclosure/2003-July/006743.html mailing-listx_refsource_FULLDISC
- http://www.cert.org/advisories/CA-2003-15.html third-party-advisoryx_refsource_CERTPatchThird Party AdvisoryUS Government Resource
- http://www.cert.org/advisories/CA-2003-17.html third-party-advisoryx_refsource_CERTExploitPatchThird Party AdvisoryUS Government Resource
- http://www.cisco.com/warp/public/707/cisco-sa-20030717-blocked.shtml vendor-advisoryx_refsource_CISCO
- http://www.kb.cert.org/vuls/id/411332 third-party-advisoryx_refsource_CERT-VNUS Government Resource
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5603 vdb-entrysignaturex_refsource_OVAL
| Link | Providers | Tags |
|---|---|---|
| http://lists.grok.org.uk/pipermail/full-disclosure/2003-July/006743.html | mailing-listx_refsource_FULLDISC | |
| http://www.cert.org/advisories/CA-2003-15.html | third-party-advisoryx_refsource_CERTPatchThird Party AdvisoryUS Government Resource | |
| http://www.cert.org/advisories/CA-2003-17.html | third-party-advisoryx_refsource_CERTExploitPatchThird Party AdvisoryUS Government Resource | |
| http://www.cisco.com/warp/public/707/cisco-sa-20030717-blocked.shtml | vendor-advisoryx_refsource_CISCO | |
| http://www.kb.cert.org/vuls/id/411332 | third-party-advisoryx_refsource_CERT-VNUS Government Resource | |
| https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5603 | vdb-entrysignaturex_refsource_OVAL |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Jul 25, 2003
Updated Aug 8, 2024
Reserved Jul 16, 2003
Link CVE-2003-0567
CISA Vulnrichment
Updated n/a