CVE-2012-1947
Heap-based buffer overflow in the utf16_to_isolatin1 function in Mozilla Firefox 4.x through 12.0...
9.3 High
Heap-based buffer overflow in the utf16_to_isolatin1 function in Mozilla Firefox 4.x through 12.0, Firefox ESR 10.x before 10.0.5, Thunderbird 5.0 through 12.0, Thunderbird ESR 10.x before 10.0.5, and SeaMonkey before 2.10 allows remote attackers to execute arbitrary code via vectors that trigger a character-set conversion failure.
Exploit likelihood
4.58%Down 5.3 points since Feb 4, 2022
What each source reports
NVD Score used
Heap-based buffer overflow in the utf16_to_isolatin1 function in Mozilla Firefox 4.x through 12.0, Firefox ESR 10.x before 10.0.5, Thunderbird 5.0 through 12.0, Thunderbird ESR 10.x before 10.0.5, and SeaMonkey before 2.10 allows remote attackers to execute arbitrary code via vectors that trigger a character-set conversion failure.
- Record
CVE-2012-1947- CVSS 2.0
- 9.3 High
AV:N/AC:M/Au:N/C:C/I:C/A:C - Weakness
- CWE-119
- Updated
- 2026-11-02
CVE List No score
Heap-based buffer overflow in the utf16_to_isolatin1 function in Mozilla Firefox 4.x through 12.0, Firefox ESR 10.x before 10.0.5, Thunderbird 5.0 through 12.0, Thunderbird ESR 10.x before 10.0.5, and SeaMonkey before 2.10 allows remote attackers to execute arbitrary code via vectors that trigger a character-set conversion failure.
- Record
CVE-2012-1947- Updated
- 2026-11-02
EUVDEUVD-2012-1956 No score
Heap-based buffer overflow in the utf16_to_isolatin1 function in Mozilla Firefox 4.x through 12.0, Firefox ESR 10.x before 10.0.5, Thunderbird 5.0 through 12.0, Thunderbird ESR 10.x before 10.0.5, and SeaMonkey before 2.10 allows remote attackers to execute arbitrary code via vectors that trigger a character-set conversion failure.
- Record
EUVD-2012-1956- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-22c8-wr9r-qr3j No score
Heap-based buffer overflow in the utf16_to_isolatin1 function in Mozilla Firefox 4.x through 12.0...
Heap-based buffer overflow in the utf16_to_isolatin1 function in Mozilla Firefox 4.x through 12.0, Firefox ESR 10.x before 10.0.5, Thunderbird 5.0 through 12.0, Thunderbird ESR 10.x before 10.0.5, and SeaMonkey before 2.10 allows remote attackers to execute arbitrary code via vectors that trigger a character-set conversion failure.
- Record
GHSA-22c8-wr9r-qr3j- Weakness
- CWE-119
- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10071-1 No score
MozillaFirefox-50.1.0-1.1 on GA media
These are all security issues fixed in the MozillaFirefox-50.1.0-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10071-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10218-1 No score
seamonkey-2.40-6.1 on GA media
These are all security issues fixed in the seamonkey-2.40-6.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10218-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:10230-1 No score
MozillaThunderbird-45.5.1-1.1 on GA media
These are all security issues fixed in the MozillaThunderbird-45.5.1-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:10230-1- Updated
- 2026-11-02
OSVopenSUSE-SU-2024:14572-1 No score
firefox-esr-128.5.1-1.1 on GA media
These are all security issues fixed in the firefox-esr-128.5.1-1.1 package on the GA media of openSUSE Tumbleweed.
- Record
openSUSE-SU-2024:14572-1- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
iceweaselDebian:6.0 From an advisory covering 3 CVEs |
before 3.5.16-16, plus listed versions 3.5.16-103.5.16-10~bpo50+13.5.16-113.5.16-11~bpo50+13.5.16-12 Show 13 moreShow less3.5.16-133.5.16-143.5.16-153.5.16-43.5.16-53.5.16-5~bpo50+13.5.16-63.5.16-6~bpo50+13.5.16-73.5.16-7~bpo50+13.5.16-83.5.16-8~bpo50+13.5.16-9 |
3.5.16-16 |
iceapeDebian:6.0 From an advisory covering 3 CVEs |
before 2.0.11-13, plus listed versions 2.0.11-102.0.11-112.0.11-122.0.11-22.0.11-3 Show 6 moreShow less2.0.11-42.0.11-52.0.11-62.0.11-72.0.11-82.0.11-9 |
2.0.11-13 |
icedoveDebian:6.0 From an advisory covering 3 CVEs |
before 3.0.11-1+squeeze11, plus listed versions 3.0.11-13.0.11-1+squeeze13.0.11-1+squeeze103.0.11-1+squeeze23.0.11-1+squeeze3 Show 6 moreShow less3.0.11-1+squeeze43.0.11-1+squeeze53.0.11-1+squeeze63.0.11-1+squeeze73.0.11-1+squeeze83.0.11-1+squeeze9 |
3.0.11-1+squeeze11 |
firefoxRed Hat:enterprise_linux:5::client From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
firefox-debuginfoRed Hat:enterprise_linux:5::client From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
xulrunnerRed Hat:enterprise_linux:5::client From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
xulrunner-debuginfoRed Hat:enterprise_linux:5::client From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
xulrunnerRed Hat:enterprise_linux:5::client_workstation From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
xulrunner-debuginfoRed Hat:enterprise_linux:5::client_workstation From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
xulrunner-develRed Hat:enterprise_linux:5::client_workstation From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
Show 38 moreShow less
| Package | Affected | Fixed |
|---|---|---|
firefoxRed Hat:enterprise_linux:5::server From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
firefox-debuginfoRed Hat:enterprise_linux:5::server From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
xulrunnerRed Hat:enterprise_linux:5::server From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
xulrunner-debuginfoRed Hat:enterprise_linux:5::server From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
xulrunner-develRed Hat:enterprise_linux:5::server From an advisory covering 11 CVEs |
before 0:10.0.5-1.el5_8 | 0:10.0.5-1.el5_8 |
firefoxRed Hat:enterprise_linux:6::client From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
firefox-debuginfoRed Hat:enterprise_linux:6::client From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunnerRed Hat:enterprise_linux:6::client From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunner-debuginfoRed Hat:enterprise_linux:6::client From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunner-develRed Hat:enterprise_linux:6::client From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
firefoxRed Hat:enterprise_linux:6::computenode From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
firefox-debuginfoRed Hat:enterprise_linux:6::computenode From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunnerRed Hat:enterprise_linux:6::computenode From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunner-debuginfoRed Hat:enterprise_linux:6::computenode From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunner-develRed Hat:enterprise_linux:6::computenode From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
firefoxRed Hat:enterprise_linux:6::server From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
firefox-debuginfoRed Hat:enterprise_linux:6::server From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunnerRed Hat:enterprise_linux:6::server From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunner-debuginfoRed Hat:enterprise_linux:6::server From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunner-develRed Hat:enterprise_linux:6::server From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
firefoxRed Hat:enterprise_linux:6::workstation From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
firefox-debuginfoRed Hat:enterprise_linux:6::workstation From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunnerRed Hat:enterprise_linux:6::workstation From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunner-debuginfoRed Hat:enterprise_linux:6::workstation From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
xulrunner-develRed Hat:enterprise_linux:6::workstation From an advisory covering 11 CVEs |
before 0:10.0.5-1.el6_2 | 0:10.0.5-1.el6_2 |
thunderbirdRed Hat:enterprise_linux:5::client From an advisory covering 11 CVEs |
before 0:10.0.5-2.el5_8 | 0:10.0.5-2.el5_8 |
thunderbird-debuginfoRed Hat:enterprise_linux:5::client From an advisory covering 11 CVEs |
before 0:10.0.5-2.el5_8 | 0:10.0.5-2.el5_8 |
thunderbirdRed Hat:rhel_productivity:5 From an advisory covering 11 CVEs |
before 0:10.0.5-2.el5_8 | 0:10.0.5-2.el5_8 |
thunderbird-debuginfoRed Hat:rhel_productivity:5 From an advisory covering 11 CVEs |
before 0:10.0.5-2.el5_8 | 0:10.0.5-2.el5_8 |
thunderbirdRed Hat:enterprise_linux:6::client From an advisory covering 11 CVEs |
before 0:10.0.5-2.el6_2 | 0:10.0.5-2.el6_2 |
thunderbird-debuginfoRed Hat:enterprise_linux:6::client From an advisory covering 11 CVEs |
before 0:10.0.5-2.el6_2 | 0:10.0.5-2.el6_2 |
thunderbirdRed Hat:enterprise_linux:6::server From an advisory covering 11 CVEs |
before 0:10.0.5-2.el6_2 | 0:10.0.5-2.el6_2 |
thunderbird-debuginfoRed Hat:enterprise_linux:6::server From an advisory covering 11 CVEs |
before 0:10.0.5-2.el6_2 | 0:10.0.5-2.el6_2 |
thunderbirdRed Hat:enterprise_linux:6::workstation From an advisory covering 11 CVEs |
before 0:10.0.5-2.el6_2 | 0:10.0.5-2.el6_2 |
thunderbird-debuginfoRed Hat:enterprise_linux:6::workstation From an advisory covering 11 CVEs |
before 0:10.0.5-2.el6_2 | 0:10.0.5-2.el6_2 |
MozillaFirefoxopenSUSE:Tumbleweed From an advisory covering 899 CVEs |
before 50.1.0-1.1 | 50.1.0-1.1 |
MozillaThunderbirdopenSUSE:Tumbleweed From an advisory covering 560 CVEs |
before 45.5.1-1.1 | 45.5.1-1.1 |
firefox-esropenSUSE:Tumbleweed From an advisory covering 1860 CVEs |
before 128.5.1-1.1 | 128.5.1-1.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2012-1947 is a high vulnerability (CVSS 9.3) in Mozilla Firefox, published June 5, 2012. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.58%, the 91st percentile. No source names a fixed version.
References
mandriva.com/security/advisories?name=MDVSA-2012:088
debian.org/security/2012/dsa-2488
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16911
rhn.redhat.com/errata/RHSA-2012-0710.html
mozilla.org/security/announce/2012/mfsa2012-40.html
lists.opensuse.org/opensuse-security-announce/2012-06/msg00012.html
Show 194 moreShow less
bugzilla.mozilla.org/show_bug.cgi?id=744541
nvd.nist.gov/vuln/detail/CVE-2012-1947
github.com/advisories/GHSA-22c8-wr9r-qr3j
access.redhat.com/errata/RHSA-2012:0710
bugzilla.redhat.com/show_bug.cgi?id=827829
security.access.redhat.com/data/csaf/v2/advisories/2012/rhsa-2012_0710.json
cve.org/CVERecord?id=CVE-2011-3101
suse.com/security/cve/CVE-2008-5913
This page doesn't list everything
Left out here: 1,954 references. The JSON record has them.