CVE-2011-0073
CriticalPublic exploitMozilla dangling pointer flaw (MFSA 2011-13)
Published Apr 28, 2011 · Updated Mar 9, 2026
Key Facts
Patch immediately- CVE-2011-0073 is a critical-severity vulnerability (CVSS 10.0 v2) affecting Firefox (Mozilla), Seamonkey (Mozilla), iceape (debian) and 5 more products.
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 70% probability of exploitation in the next 30 days.
- Fixed versions are available, including Firefox 0:3.6.17-1.el5_6, Firefox 0:3.6.17-1.el6_0, Firefox 0:3.6.17-2.el4.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v2
10.0
AV:N/AC:L/Au:N/C:C/I:C/A:C
EPSS (30-day exploit likelihood)
70%
Higher than 99.3% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2011-0073 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Mozilla Firefox before 3.5.19 and 3.6.x before 3.6.17, and SeaMonkey before 2.0.14, does not properly use nsTreeRange data structures, which allows remote attackers to execute arbitrary code via unspecified vectors that lead to a "dangling pointer."
Affected Products
183 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| FirefoxMozilla | 1.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.0.7 | 3.5.18 |
| SeamonkeyMozilla | 1.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.0.7 | 2.0.13 |
| iceapedebian | See advisory | 2.0.11-5 |
| icedovedebian | See advisory | 3.0.11-1+squeeze2 |
| iceweaseldebian | See advisory | 3.5.16-7 |
Patched Releases
Firefox
0:3.6.17-1.el5_6, 0:3.6.17-1.el6_0, 0:3.6.17-2.el4, 3.6.17-1.0.1.el5_6, 3.6.17-1.0.1.el6_0, 3.5.18
iceape
2.0.11-5
icedove
3.0.11-1+squeeze2
iceweasel
3.5.16-7
Seamonkey
2.0.13, 0:1.0.9-70.el4_8
thunderbird
0:1.5.0.12-38.el4, 0:2.0.0.24-17.el5_6, 0:3.1.10-1.el6_0, 3.1.10-1.0.1.el6_0
xulrunner
0:1.9.2.17-3.el5_6, 0:1.9.2.17-4.el6_0, 1.9.2.17-3.0.1.el5_6, 1.9.2.17-4.0.1.el6_0
xulrunner-devel
1.9.2.17-3.0.1.el5_6, 1.9.2.17-4.0.1.el6_0
Timeline
Publicly disclosed
Apr 28, 2011
Last updated
Mar 9, 2026
Weakness Type
- CWE-20 Improper Input Validation
References
- advisoryRHSA-2011:0471
- advisoryRHSA-2011:0473
- advisoryRHSA-2011:0474
- advisoryRHSA-2011:0475
- advisoryhttp://www.mozilla.org/security/announce/2011/mfsa2011-13.html
FAQ
Common Questions.
Mozilla Firefox before 3.5.19 and 3.6.x before 3.6.17, and SeaMonkey before 2.0.14, does not properly use nsTreeRange data structures, which allows remote attackers to execute arbitrary code via unspecified vectors that lead to a "dangling pointer."
Affected: Firefox (Mozilla) versions 1.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.0.7; Seamonkey (Mozilla) versions 1.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.0.7; iceape (debian), among others. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including Firefox 0:3.6.17-1.el5_6, Firefox 0:3.6.17-1.el6_0, Firefox 0:3.6.17-2.el4.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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