medium
4
CWE
NVD-CWE-Other 476
Advisory Published
CVE Published
Updated

CVE-2011-1091: Null Pointer Dereference

First published: Tue Mar 08 2011(Updated: )

libymsg.c in the Yahoo! protocol plugin in libpurple in Pidgin 2.6.0 through 2.7.10 allows (1) remote authenticated users to cause a denial of service (NULL pointer dereference and application crash) via a malformed YMSG notification packet, and allows (2) remote Yahoo! servers to cause a denial of service (NULL pointer dereference and application crash) via a malformed YMSG SMS message.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
Pidgin=2.6.0
Pidgin=2.6.1
Pidgin=2.6.2
Pidgin=2.6.4
Pidgin=2.6.5
Pidgin=2.6.6
Pidgin=2.7.0
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

Remedy

http://developer.pidgin.im/viewmtn/revision/diff/5cbe18129b6e7c660bc093f7e5e1414ceca17d04/with/a7c415abba1f5f01f79295337518837f73d99bb7/libpurple/protocols/yahoo/libymsg.c

Remedy

http://developer.pidgin.im/viewmtn/revision/info/a7c415abba1f5f01f79295337518837f73d99bb7

Remedy

http://www.pidgin.im/news/security/?id=51

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-2011-1091?

    CVE-2011-1091 has been classified as a high severity vulnerability due to its potential to cause denial of service via a NULL pointer dereference.

  • How do I fix CVE-2011-1091?

    To fix CVE-2011-1091, you should upgrade to a version of Pidgin that is newer than 2.7.10, as the vulnerability has been addressed in subsequent releases.

  • What software is affected by CVE-2011-1091?

    CVE-2011-1091 affects Pidgin versions 2.6.0 through 2.7.10 using the Yahoo! protocol plugin.

  • Can CVE-2011-1091 be exploited remotely?

    Yes, CVE-2011-1091 can be exploited remotely by authenticated users or malicious Yahoo! servers.

  • What are the consequences of CVE-2011-1091 exploitation?

    Exploitation of CVE-2011-1091 can lead to application crashes and denial of service for Pidgin users.

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