What’s Vulnerable › Vulnerabilities

CVE-2013-0748

• Severity: medium (CVSS 4.3 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2013-01-13 · updated 2026-06-16
• Weakness: CWE-200

Description

The XBL.__proto__.toString implementation in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and 17.x before 17.0.2, Thunderbird before 17.0.2, Thunderbird ESR 10.x before 10.0.12 and 17.x before 17.0.2, and SeaMonkey before 2.15 makes it easier for remote attackers to bypass the ASLR protection mechanism by calling the toString function of an XBL object.

Affected products

• Canonical Ubuntu Linux: 10.04, 11.10, 12.04, 12.10
• Mozilla Firefox: before 18.0; from 10.0 before 10.0.12; from 17.0 before 17.0.2 — fixed in 10.0.12, 17.0.2, 18.0
• Mozilla Seamonkey: before 2.15 — fixed in 2.15
• Mozilla Thunderbird: before 17.0.2 — fixed in 17.0.2
• Mozilla Thunderbird ESR: from 10.0 before 10.0.12; from 17.0 before 17.0.2 — fixed in 10.0.12, 17.0.2
• Opensuse: 11.4, 12.1, 12.2
• RedHat Enterprise Linux Desktop: 5.0, 6.0
• RedHat Enterprise Linux Eus: 5.9, 6.3
• RedHat Enterprise Linux Server: 5.0, 6.0
• RedHat Enterprise Linux Server Aus: 5.9
• RedHat Enterprise Linux Workstation: 5.0, 6.0
• SUSE Linux Enterprise Server 15 SP1: 10-sp4, 11-sp2
• SUSE Linux Enterprise Server: 10-sp4, 11-sp2
• SUSE Linux Enterprise Software Development Kit: 10-sp4, 11-sp2

How to fix

Upgrade to a fixed version: Mozilla Firefox 10.0.12, 17.0.2, 18.0; Mozilla Seamonkey 2.15; Mozilla Thunderbird 17.0.2; Mozilla Thunderbird ESR 10.0.12, 17.0.2. Check the vendor advisory for mitigations.

References

• http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00006.html
• http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00007.html
• http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00010.html
• http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00017.html
• http://rhn.redhat.com/errata/RHSA-2013-0144.html
• http://rhn.redhat.com/errata/RHSA-2013-0145.html
• http://www.mozilla.org/security/announce/2013/mfsa2013-11.html
• http://www.ubuntu.com/usn/USN-1681-1
• http://www.ubuntu.com/usn/USN-1681-2
• http://www.ubuntu.com/usn/USN-1681-4
• https://bugzilla.mozilla.org/show_bug.cgi?id=806031
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A17109

Get alerted when CVE-2013-0748 or the next vulnerability affects your stack