high
7.8
CWE
399
Advisory Published
CVE Published
Updated

CVE-2011-0945

First published: Mon Oct 03 2011(Updated: )

Memory leak in the Data-link switching (aka DLSw) feature in Cisco IOS 12.1 through 12.4 and 15.0 through 15.1, and IOS XE 3.1.xS before 3.1.3S and 3.2.xS before 3.2.1S, when implemented over Fast Sequence Transport (FST), allows remote attackers to cause a denial of service (memory consumption and device reload or hang) via a crafted IP protocol 91 packet, aka Bug ID CSCth69364.

Credit: ykramarz@cisco.com

Affected SoftwareAffected VersionHow to fix
Cisco IOS=12.1
Cisco IOS=12.1t
Cisco IOS=12.1xi
Cisco IOS=12.1xj
Cisco IOS=12.1xl
Cisco IOS=12.1xm
Cisco IOS=12.1xp
Cisco IOS=12.1xq
Cisco IOS=12.1xr
Cisco IOS=12.1xs
Cisco IOS=12.1xt
Cisco IOS=12.1xu
Cisco IOS=12.1xv
Cisco IOS=12.1xy
Cisco IOS=12.1ya
Cisco IOS=12.1yb
Cisco IOS=12.1yc
Cisco IOS=12.1yd
Cisco IOS=12.1ye
Cisco IOS=12.1yf
Cisco IOS=12.1yh
Cisco IOS=12.1yi
Cisco IOS=12.2b
Cisco IOS=12.2bw
Cisco IOS=12.2bx
Cisco IOS=12.2by
Cisco IOS=12.2cz
Cisco IOS=12.2dd
Cisco IOS=12.2dx
Cisco IOS=12.2ex
Cisco IOS=12.2ira
Cisco IOS=12.2irb
Cisco IOS=12.2irc
Cisco IOS=12.2ird
Cisco IOS=12.2ire
Cisco IOS=12.2ixa
Cisco IOS=12.2ixb
Cisco IOS=12.2ixc
Cisco IOS=12.2ixd
Cisco IOS=12.2ixe
Cisco IOS=12.2ixf
Cisco IOS=12.2ixg
Cisco IOS=12.2ixh
Cisco IOS=12.2mra
Cisco IOS=12.2mrb
Cisco IOS=12.2sbc
Cisco IOS=12.2sca
Cisco IOS=12.2scb
Cisco IOS=12.2scc
Cisco IOS=12.2scd
Cisco IOS=12.2sg
Cisco IOS=12.2sra
Cisco IOS=12.2srb
Cisco IOS=12.2sre
Cisco IOS=12.2su
Cisco IOS=12.2sv
Cisco IOS=12.2sxa
Cisco IOS=12.2sxb
Cisco IOS=12.2sxd
Cisco IOS=12.2sxe
Cisco IOS=12.2sxf
Cisco IOS=12.2sy
Cisco IOS=12.2sz
Cisco IOS=12.2t
Cisco IOS=12.2tpc
Cisco IOS=12.2xa
Cisco IOS=12.2xb
Cisco IOS=12.2xc
Cisco IOS=12.2xd
Cisco IOS=12.2xg
Cisco IOS=12.2xh
Cisco IOS=12.2xi
Cisco IOS=12.2xj
Cisco IOS=12.2xk
Cisco IOS=12.2xl
Cisco IOS=12.2xm
Cisco IOS=12.2xn
Cisco IOS=12.2xq
Cisco IOS=12.2xs
Cisco IOS=12.2xt
Cisco IOS=12.2xu
Cisco IOS=12.2xv
Cisco IOS=12.2xw
Cisco IOS=12.2ya
Cisco IOS=12.2yb
Cisco IOS=12.2yc
Cisco IOS=12.2yd
Cisco IOS=12.2ye
Cisco IOS=12.2yf
Cisco IOS=12.2yh
Cisco IOS=12.2yj
Cisco IOS=12.2yk
Cisco IOS=12.2yl
Cisco IOS=12.2ym
Cisco IOS=12.2yn
Cisco IOS=12.2yt
Cisco IOS=12.2yu
Cisco IOS=12.2yv
Cisco IOS=12.2yw
Cisco IOS=12.2yx
Cisco IOS=12.2yy
Cisco IOS=12.2yz
Cisco IOS=12.2zc
Cisco IOS=12.2zd
Cisco IOS=12.2ze
Cisco IOS=12.2zf
Cisco IOS=12.2zh
Cisco IOS=12.2zj
Cisco IOS=12.2zl
Cisco IOS=12.2zp
Cisco IOS=12.2zu
Cisco IOS=12.2zy
Cisco IOS=12.2zya
Cisco IOS=12.3
Cisco IOS=12.3b
Cisco IOS=12.3t
Cisco IOS=12.3tpc
Cisco IOS=12.3va
Cisco IOS=12.3xa
Cisco IOS=12.3xb
Cisco IOS=12.3xc
Cisco IOS=12.3xd
Cisco IOS=12.3xe
Cisco IOS=12.3xf
Cisco IOS=12.3xg
Cisco IOS=12.3xi
Cisco IOS=12.3xj
Cisco IOS=12.3xk
Cisco IOS=12.3xl
Cisco IOS=12.3xq
Cisco IOS=12.3xr
Cisco IOS=12.3xs
Cisco IOS=12.3xu
Cisco IOS=12.3xw
Cisco IOS=12.3xx
Cisco IOS=12.3xy
Cisco IOS=12.3xz
Cisco IOS=12.3ya
Cisco IOS=12.3yd
Cisco IOS=12.3yf
Cisco IOS=12.3yg
Cisco IOS=12.3yh
Cisco IOS=12.3yi
Cisco IOS=12.3yj
Cisco IOS=12.3yk
Cisco IOS=12.3ym
Cisco IOS=12.3yq
Cisco IOS=12.3ys
Cisco IOS=12.3yt
Cisco IOS=12.3yu
Cisco IOS=12.3yx
Cisco IOS=12.3yz
Cisco IOS=12.3za
Cisco IOS=12.4
Cisco IOS=12.4gc
Cisco IOS=12.4md
Cisco IOS=12.4mda
Cisco IOS=12.4mr
Cisco IOS=12.4mra
Cisco IOS=12.4sw
Cisco IOS=12.4t
Cisco IOS=12.4xa
Cisco IOS=12.4xb
Cisco IOS=12.4xc
Cisco IOS=12.4xd
Cisco IOS=12.4xe
Cisco IOS=12.4xf
Cisco IOS=12.4xg
Cisco IOS=12.4xj
Cisco IOS=12.4xk
Cisco IOS=12.4xl
Cisco IOS=12.4xm
Cisco IOS=12.4xn
Cisco IOS=12.4xp
Cisco IOS=12.4xq
Cisco IOS=12.4xr
Cisco IOS=12.4xt
Cisco IOS=12.4xv
Cisco IOS=12.4xw
Cisco IOS=12.4xy
Cisco IOS=12.4xz
Cisco IOS=12.4ya
Cisco IOS=12.4yb
Cisco IOS=12.4yd
Cisco IOS=12.4ye
Cisco IOS=12.4yg
Cisco IOS=15.0m
Cisco IOS=15.0s
Cisco IOS=15.0xa
Cisco IOS=15.1t
Cisco IOS=15.1xb
Cisco IOS XE Software=3.1.0s
Cisco IOS XE Software=3.1.1s
Cisco IOS XE Software=3.1.2s
Cisco IOS XE Software=3.2.0s

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2011-0945?

    CVE-2011-0945 has a high severity rating as it causes a denial of service due to a memory leak.

  • How do I fix CVE-2011-0945?

    To fix CVE-2011-0945, upgrade your Cisco IOS or IOS XE software to the versions that contain the appropriate patches.

  • What are the affected versions in CVE-2011-0945?

    CVE-2011-0945 affects Cisco IOS versions 12.1 through 12.4 and 15.0 through 15.1, along with specific versions of IOS XE.

  • Can CVE-2011-0945 be exploited remotely?

    Yes, CVE-2011-0945 can be exploited by remote attackers to exhaust the memory of the affected device.

  • What impact does CVE-2011-0945 have on devices?

    The impact of CVE-2011-0945 is a denial of service condition where the affected devices may become unresponsive due to memory consumption.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203