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Fencer Intel
critical 9.3

CVE-2013-0757 in the critical feed json

The Chrome Object Wrapper (COW) implementation in Mozilla Firefox before 18.0, Firefox ESR 17.x before 17.0.2, Thunderbird before 17.0.2, T…

published 13y ago modified 4mo ago also EUVD-2013-0768

cvss
9.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
60.9%
EPSS 60.9% chance of exploitation in 30 days, percentile 99.1%
public exploits
3
Metasploit and Exploit-DB

Summary

The Chrome Object Wrapper (COW) implementation in Mozilla Firefox before 18.0, Firefox ESR 17.x before 17.0.2, Thunderbird before 17.0.2, Thunderbird ESR 17.x before 17.0.2, and SeaMonkey before 2.15 does not prevent modifications to the prototype of an object, which allows remote attackers to execute arbitrary JavaScript code with chrome privileges by referencing Object.prototype.__proto__ in a crafted HTML document.

Patch / fix

  • mozilla firefox 17.0.2, 18.0
  • mozilla seamonkey 2.15
  • mozilla thunderbird 17.0.2
  • mozilla thunderbird_esr 17.0.2
  • 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

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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-2013-0757 updated cvss 6.8

Mozilla: Chrome Object Wrapper (COW) bypass through changing prototype (MFSA 2013-14)

  • Red Hat Enterprise Linux 5 firefox, thunderbird Red Hat Enterprise Linux 6 firefox, thunderbird
    not affected: vulnerable code not present

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

Timeline

  1. First public exploit (Metasploit exploit/multi/browser/firefox_svg_plugin)
  2. Published

Exploit prediction

60.86% chance of exploitation in the next 30 days, higher than 99.1% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • Metasploit exploit/multi/browser/firefox_svg_plugin Firefox 17.0.1 Flash Privileged Code Injection metasploit exploit, excellent rank, 2013-01-08
  • EDB-41684 GIT 1.8.5.6/1.9.5/2.0.5/2.1.4/2.2.1 & Mercurial < 3.2.3 - Multiple Vulnerabilities (Metasploit) remote, 2014-12-18
  • EDB-41683 Mozilla Firefox < 17.0.1 - Flash Privileged Code Injection (Metasploit) local, 2013-01-08
  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=813901 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-20 Improper Input Validation

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.