CVE-2011-3661: High severity firefox vulnerability

Published Dec 21, 2011
·
Updated

YARR, as used in Mozilla Firefox 4.x through 8.0, Thunderbird 5.0 through 8.0, and SeaMonkey before 2.6, allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via crafted JavaScript.

Affected Software

100 affected components
Mozilla Firefox=4.0
Mozilla Firefox=4.0-beta1
Mozilla Firefox=4.0-beta10
Mozilla Firefox=4.0-beta11
Mozilla Firefox=4.0-beta12
Mozilla Firefox=4.0-beta2
Mozilla Firefox=4.0-beta3
Mozilla Firefox=4.0-beta4
Mozilla Firefox=4.0-beta5
Mozilla Firefox=4.0-beta6
Mozilla Firefox=4.0-beta7
Mozilla Firefox=4.0-beta8
Mozilla Firefox=4.0-beta9
Mozilla Firefox=4.0.1
Mozilla Firefox=5.0
Mozilla Firefox=5.0.1
Mozilla Firefox=6.0
Mozilla Firefox=6.0.1
Mozilla Firefox=6.0.2
Mozilla Firefox=7.0
Mozilla Firefox=7.0.1
Mozilla Firefox=8.0
Mozilla SeaMonkey<=2.5
Mozilla SeaMonkey=1.0
Mozilla SeaMonkey=1.0
Mozilla SeaMonkey=1.0
Mozilla SeaMonkey=1.0
Mozilla SeaMonkey=1.0-alpha
Mozilla SeaMonkey=1.0-beta
Mozilla SeaMonkey=1.0.1
Mozilla SeaMonkey=1.0.2
Mozilla SeaMonkey=1.0.3
Mozilla SeaMonkey=1.0.4
Mozilla SeaMonkey=1.0.5
Mozilla SeaMonkey=1.0.6
Mozilla SeaMonkey=1.0.7
Mozilla SeaMonkey=1.0.8
Mozilla SeaMonkey=1.0.9
Mozilla SeaMonkey=1.0.99
Mozilla SeaMonkey=1.1
Mozilla SeaMonkey=1.1-alpha
Mozilla SeaMonkey=1.1-beta
Mozilla SeaMonkey=1.1.1
Mozilla SeaMonkey=1.1.2
Mozilla SeaMonkey=1.1.3
Mozilla SeaMonkey=1.1.4
Mozilla SeaMonkey=1.1.5
Mozilla SeaMonkey=1.1.5-1.1.10
Mozilla SeaMonkey=1.1.6
Mozilla SeaMonkey=1.1.7
Mozilla SeaMonkey=1.1.8
Mozilla SeaMonkey=1.1.9
Mozilla SeaMonkey=1.1.10
Mozilla SeaMonkey=1.1.11
Mozilla SeaMonkey=1.1.12
Mozilla SeaMonkey=1.1.13
Mozilla SeaMonkey=1.1.14
Mozilla SeaMonkey=1.1.15
Mozilla SeaMonkey=1.1.16
Mozilla SeaMonkey=1.1.17
Mozilla SeaMonkey=1.1.18
Mozilla SeaMonkey=1.1.19
Mozilla SeaMonkey=1.5.0.8
Mozilla SeaMonkey=1.5.0.9
Mozilla SeaMonkey=1.5.0.10
Mozilla SeaMonkey=2.0
Mozilla SeaMonkey=2.0-alpha_1
Mozilla SeaMonkey=2.0-alpha_2
Mozilla SeaMonkey=2.0-alpha_3
Mozilla SeaMonkey=2.0-beta_1
Mozilla SeaMonkey=2.0-beta_2
Mozilla SeaMonkey=2.0-rc1
Mozilla SeaMonkey=2.0-rc2
Mozilla SeaMonkey=2.0.1
Mozilla SeaMonkey=2.0.2
Mozilla SeaMonkey=2.0.3
Mozilla SeaMonkey=2.0.4
Mozilla SeaMonkey=2.0.5
Mozilla SeaMonkey=2.0.6
Mozilla SeaMonkey=2.0.7
Mozilla SeaMonkey=2.0.8
Mozilla SeaMonkey=2.0.9
Mozilla SeaMonkey=2.0.10
Mozilla SeaMonkey=2.0.11
Mozilla SeaMonkey=2.0.12
Mozilla SeaMonkey=2.0.13
Mozilla SeaMonkey=2.0.14
Mozilla SeaMonkey=2.0a1
Mozilla SeaMonkey=2.0a1pre
Mozilla SeaMonkey=2.1-alpha1
Mozilla SeaMonkey=2.1-alpha2
Mozilla SeaMonkey=2.1-alpha3
Mozilla SeaMonkey=2.3.3
Mozilla Thunderbird=5.0
Mozilla Thunderbird=6.0
Mozilla Thunderbird=6.0.1
Mozilla Thunderbird=6.0.2
Mozilla Thunderbird=7.0
Mozilla Thunderbird=7.0.1
Mozilla Thunderbird=8.0

Event History

Dec 21, 2011
CVE Published
via MITRE·02:00 AM
Data Sourced
via MITRE·02:00 AM
Description

Frequently Asked Questions

1

What is the severity of CVE-2011-3661?

CVE-2011-3661 has been classified with a severity level that allows for a denial of service and potential arbitrary code execution.

2

How do I fix CVE-2011-3661?

To mitigate CVE-2011-3661, upgrade to the latest versions of affected software including Mozilla Firefox, Thunderbird, or SeaMonkey.

3

What versions of software are affected by CVE-2011-3661?

CVE-2011-3661 affects Mozilla Firefox versions 4.x through 8.0, Thunderbird 5.0 through 8.0, and earlier versions of SeaMonkey.

4

What kind of attacks does CVE-2011-3661 enable?

CVE-2011-3661 allows remote attackers to crash applications or potentially execute arbitrary code via specially crafted JavaScript.

5

Is there a workaround for CVE-2011-3661 if I cannot update?

While updating is the best solution for CVE-2011-3661, using security settings to disable JavaScript may serve as a temporary workaround.

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.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203