CVE-2011-2520
First published: Thu Jun 30 2011(Updated: )
fw_dbus.py in system-config-firewall 1.2.29 and earlier uses the pickle Python module unsafely during D-Bus communication between the GUI and the backend, which might allow local users to gain privileges via a crafted serialized object.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Red Hat system-config-firewall | <=1.2.29 | |
| Red Hat system-config-firewall | =1.2.11 | |
| Red Hat system-config-firewall | =1.2.12 | |
| Red Hat system-config-firewall | =1.2.14 | |
| Red Hat system-config-firewall | =1.2.15 | |
| Red Hat system-config-firewall | =1.2.16 | |
| Red Hat system-config-firewall | =1.2.17 | |
| Red Hat system-config-firewall | =1.2.21 | |
| Red Hat system-config-firewall | =1.2.22 | |
| Red Hat system-config-firewall | =1.2.23 | |
| Red Hat system-config-firewall | =1.2.24 | |
| Red Hat system-config-firewall | =1.2.25 | |
| Red Hat system-config-firewall | =1.2.26 | |
| Red Hat system-config-firewall | =1.2.27 | |
| Red Hat system-config-firewall | =1.2.28 | |
| Fedora | =15 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2011/07/18/6
- http://www.securityfocus.com/bid/48715
- https://bugzilla.redhat.com/show_bug.cgi?id=717985
- http://secunia.com/advisories/45294
- http://securitytracker.com/id?1025793
- http://www.redhat.com/support/errata/RHSA-2011-0953.html
- http://lists.fedoraproject.org/pipermail/package-announce/2011-August/063314.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/68734
- http://nadiana.com/python-pickle-insecure
- http://blog.nelhage.com/2011/03/exploiting-pickle/
- https://access.redhat.com/security/cve/CVE-2011-2520
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=717985#c10
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=717985#c11
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=511508&action=diff
- https://bugzilla.redhat.com/show_bug.cgi/attachment.cgi?id=511508&action=edit
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=717985#c19
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=717985#c22
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=717985#c28
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=722992
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=722991
- https://rhn.redhat.com/errata/RHSA-2011-0953.html
Frequently Asked Questions
What is the severity of CVE-2011-2520?
CVE-2011-2520 is classified as a medium severity vulnerability due to possible privilege escalation by local users.
How do I fix CVE-2011-2520?
To fix CVE-2011-2520, upgrade system-config-firewall to version 1.2.30 or later, where the vulnerability has been addressed.
What systems are affected by CVE-2011-2520?
CVE-2011-2520 affects system-config-firewall versions 1.2.29 and earlier, as well as Fedora 15.
What type of vulnerability is CVE-2011-2520?
CVE-2011-2520 is a privilege escalation vulnerability arising from unsafe use of the pickle Python module during D-Bus communication.
Is CVE-2011-2520 exploitable remotely?
CVE-2011-2520 is not remotely exploitable; it requires local access to the affected system.
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- version/red hat system-config-firewall/1.2.21
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- version/red hat system-config-firewall/1.2.24
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