medium
5
CWE
20
Advisory Published
Updated

CVE-2011-4603: Input Validation

First published: Sat Dec 17 2011(Updated: )

The silc_channel_message function in ops.c in the SILC protocol plugin in libpurple in Pidgin before 2.10.1 does not perform the expected UTF-8 validation on message data, which allows remote attackers to cause a denial of service (application crash) via a crafted message, a different vulnerability than CVE-2011-3594.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
Pidgin<=2.10.0
Pidgin=2.0.0
Pidgin=2.0.1
Pidgin=2.0.2
Pidgin=2.1.0
Pidgin=2.1.1
Pidgin=2.2.0
Pidgin=2.2.1
Pidgin=2.2.2
Pidgin=2.3.0
Pidgin=2.3.1
Pidgin=2.4.0
Pidgin=2.4.1
Pidgin=2.4.2
Pidgin=2.4.3
Pidgin=2.5.0
Pidgin=2.5.1
Pidgin=2.5.2
Pidgin=2.5.3
Pidgin=2.5.4
Pidgin=2.5.5
Pidgin=2.5.6
Pidgin=2.5.7
Pidgin=2.5.8
Pidgin=2.5.9
Pidgin=2.6.0
Pidgin=2.6.1
Pidgin=2.6.2
Pidgin=2.6.3
Pidgin=2.6.4
Pidgin=2.6.5
Pidgin=2.6.6
Pidgin=2.7.1
Pidgin=2.7.2
Pidgin=2.7.3
Pidgin=2.7.4
Pidgin=2.7.5
Pidgin=2.7.6
Pidgin=2.7.7
Pidgin=2.7.8
Pidgin=2.7.9
Pidgin=2.7.10
Pidgin=2.7.11
Pidgin=2.8.0
Pidgin=2.9.0

Remedy

http://developer.pidgin.im/viewmtn/revision/diff/c7b95cc3be0590b52edc02d4750ae62844c1acb6/with/afb9ede3de989f217f03d5670cca00e628bd11f1/libpurple/protocols/silc/ops.c

Remedy

http://www.pidgin.im/news/security/?id=59

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2011-4603?

    CVE-2011-4603 is categorized as a denial of service vulnerability due to application crashes caused by malformed messages.

  • How do I fix CVE-2011-4603?

    To fix CVE-2011-4603, you should update Pidgin to version 2.10.1 or later as it contains the security patch.

  • What happens if I am still using an affected version of Pidgin related to CVE-2011-4603?

    If you are using an affected version of Pidgin, your application may be vulnerable to crashes when receiving crafted messages.

  • Which versions of Pidgin are affected by CVE-2011-4603?

    CVE-2011-4603 affects all Pidgin versions prior to 2.10.1, including versions from 2.0.0 to 2.10.0.

  • Is it safe to use Pidgin after the fix for CVE-2011-4603 is applied?

    Yes, after applying the fix by updating to Pidgin version 2.10.1 or later, the vulnerability CVE-2011-4603 should no longer pose a risk.

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