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Fencer Intel
medium 4.3

CVE-2013-0748 json

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, Thunderbi…

published 2013-01-13 13 y ago modified 2026-06-16 4 mo ago also EUVD-2013-0759

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 80%
public exploits
0
none known

Summary

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.

Patch / fix

  • 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
  • thunderbird RHEL 5 PRODUCTIVITY 10.0.12-3.el5_9
  • thunderbird RHEL 6 10.0.12-3.el6_3
  • firefox RHEL 5 10.0.12-1.el5_9
  • firefox RHEL 6 10.0.12-1.el6_3
  • xulrunner RHEL 5 10.0.12-1.el5_9
  • xulrunner RHEL 6 10.0.12-1.el6_3

red hat advisories RHSA-2013:0145RHSA-2013:0144

  • firefox-esr openSUSE Tumbleweed 128.5.1-1.1
  • MozillaFirefox openSUSE Tumbleweed 50.1.0-1.1
  • MozillaThunderbird openSUSE Tumbleweed 45.5.1-1.1

opensuse advisories openSUSE-SU-2024:14572-1openSUSE-SU-2024:10071-1openSUSE-SU-2024:10230-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2013-0748 updated cvss 4.3

Mozilla: Address space layout leaked in XBL objects (MFSA 2013-11)

  • Red Hat Enterprise Linux 5 thunderbird
    affected: no fix available
  • Red Hat Enterprise Linux (v. 5 server) firefox 10.0.12-1.el5_9, xulrunner 10.0.12-1.el5_9 Red Hat Enterprise Linux Desktop (v. 6) firefox 10.0.12-1.el6_3, xulrunner 10.0.12-1.el6_3, thunderbird 10.0.12-3.el6_3 Red Hat Enterprise Linux Desktop Optional (v. 6) xulrunner 10.0.12-1.el6_3 Red Hat Enterprise Linux HPC Node Optional (v. 6) firefox 10.0.12-1.el6_3, xulrunner 10.0.12-1.el6_3 Red Hat Enterprise Linux Server (v. 6) firefox 10.0.12-1.el6_3, xulrunner 10.0.12-1.el6_3 Red Hat Enterprise Linux Server Optional (v. 6) xulrunner 10.0.12-1.el6_3, thunderbird 10.0.12-3.el6_3
    +2 more products
    Red Hat Enterprise Linux Workstation (v. 6) firefox 10.0.12-1.el6_3, xulrunner 10.0.12-1.el6_3, thunderbird 10.0.12-3.el6_3 Red Hat Enterprise Linux Workstation Optional (v. 6) xulrunner 10.0.12-1.el6_3
    fixed: vendor fix RHSA-2013:0144
  • Red Hat RHEL Optional Productivity Applications (v. 5 server) thunderbird 10.0.12-3.el5_9
    fixed: vendor fix RHSA-2013:0145

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.00% chance of exploitation in the next 30 days, higher than 80% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=806031 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.