Firefox download filename spoofing with RTL override
Published Oct 29, 2009
9.3
HIGHCVSS 2.0
EPSS 3.18%
Description
Mozilla Firefox before 3.0.15 and 3.5.x before 3.5.4, and SeaMonkey before 2.0, does not properly handle a right-to-left override (aka RLO or U+202E) Unicode character in a download filename, which allows remote attackers to spoof file extensions via a crafted filename, as demonstrated by displaying a non-executable extension for an executable file.
Affected products
No data.
- 3.0
- 3.0.1
- 3.0.2
- 3.0.3
- 3.0.4
- 3.0.5
- 3.0.6
- 3.0.7
- 3.0.8
- 3.0.9
- 3.0.10
- 3.0.11
- 3.0.12
- 3.0.13
- 3.5.1
- 3.5.2
- 3.5.3
- ≤ 1.5.0.10
- 1.0
- 1.0
- 1.0
- 1.0.1
- 1.0.2
- 1.0.3
- 1.0.4
- 1.0.5
- 1.0.6
- 1.0.7
- 1.0.8
- 1.0.9
- 1.1
- 1.1
- 1.1
- 1.1.1
- 1.1.2
- 1.1.3
- 1.1.4
- 1.1.5
- 1.1.6
- 1.1.7
- 1.1.8
- 1.1.9
- 1.1.10
- 1.1.11
- 1.1.12
- 1.1.13
- 1.1.14
- 1.1.15
- 1.1.16
- 1.1.17
- 1.5.0.8
- 1.5.0.9
No data.
Red Hat Enterprise Linux 3
seamonkey-0:1.0.9-0.47.el3
Fixed · RHSA-2009:1531
Red Hat Enterprise Linux 4
firefox-0:3.0.15-3.el4
Fixed · RHSA-2009:1530
Red Hat Enterprise Linux 4
nspr-0:4.7.6-1.el4_8
Fixed · RHSA-2009:1530
Red Hat Enterprise Linux 4
seamonkey-0:1.0.9-50.el4_8
Fixed · RHSA-2009:1531
Red Hat Enterprise Linux 4
thunderbird-0:1.5.0.12-25.el4
Fixed · RHSA-2010:0154
Red Hat Enterprise Linux 5
firefox-0:3.0.15-3.el5_4
Fixed · RHSA-2009:1530
Red Hat Enterprise Linux 5
nspr-0:4.7.6-1.el5_4
Fixed · RHSA-2009:1530
Red Hat Enterprise Linux 5
thunderbird-0:2.0.0.24-2.el5_4
Fixed · RHSA-2010:0153
Red Hat Enterprise Linux 5
xulrunner-0:1.9.0.15-3.el5_4
Fixed · RHSA-2009:1530
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 3 | seamonkey-0:1.0.9-0.47.el3 | Fixed | RHSA-2009:1531 |
| Red Hat Enterprise Linux 4 | firefox-0:3.0.15-3.el4 | Fixed | RHSA-2009:1530 |
| Red Hat Enterprise Linux 4 | nspr-0:4.7.6-1.el4_8 | Fixed | RHSA-2009:1530 |
| Red Hat Enterprise Linux 4 | seamonkey-0:1.0.9-50.el4_8 | Fixed | RHSA-2009:1531 |
| Red Hat Enterprise Linux 4 | thunderbird-0:1.5.0.12-25.el4 | Fixed | RHSA-2010:0154 |
| Red Hat Enterprise Linux 5 | firefox-0:3.0.15-3.el5_4 | Fixed | RHSA-2009:1530 |
| Red Hat Enterprise Linux 5 | nspr-0:4.7.6-1.el5_4 | Fixed | RHSA-2009:1530 |
| Red Hat Enterprise Linux 5 | thunderbird-0:2.0.0.24-2.el5_4 | Fixed | RHSA-2010:0153 |
| Red Hat Enterprise Linux 5 | xulrunner-0:1.9.0.15-3.el5_4 | Fixed | RHSA-2009:1530 |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 3.18% (0.03183) | 87.62th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.18% (0.03183) | 86.37th | v5 (v2026.06.15) |
| Mar 30, 2025 | 3.02% (0.03024) | 85.42th | v4 (v2025.03.14) |
| Mar 29, 2025 | 4.79% (0.04786) | 82.06th | v4 (v2025.03.14) |
| Mar 17, 2025 | 2.36% (0.02357) | 83.81th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.42% (0.01424) | 87.07th | v3 (v2023.03.01) |
| Mar 17, 2024 | 1.42% (0.01424) | 86.20th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.27% (0.01271) | 83.53th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.41% (0.03407) | 84.65th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.41% (0.03407) | 83.10th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.41% (0.03407) | 66.20th | v2 (v2022.01.01) |
References (18)
- http://lists.opensuse.org/opensuse-security-announce/2010-06/msg00001.html vendor-advisoryx_refsource_SUSE
- http://secunia.com/advisories/38977 third-party-advisoryx_refsource_SECUNIA
- http://sunsolve.sun.com/search/document.do?assetkey=1-26-272909-1 vendor-advisoryx_refsource_SUNALERT
- http://www.mandriva.com/security/advisories?name=MDVSA-2009:294 vendor-advisoryx_refsource_MANDRIVA
- http://www.mozilla.org/security/announce/2009/mfsa2009-62.html x_refsource_CONFIRMPatchVendor Advisory
- http://www.redhat.com/support/errata/RHSA-2010-0153.html vendor-advisoryx_refsource_REDHAT
- http://www.redhat.com/support/errata/RHSA-2010-0154.html vendor-advisoryx_refsource_REDHAT
- http://www.ubuntu.com/usn/USN-915-1 vendor-advisoryx_refsource_UBUNTU
- http://www.vupen.com/english/advisories/2009/3334 vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2010/0648 vdb-entryx_refsource_VUPEN
- http://www.vupen.com/english/advisories/2010/0650 vdb-entryx_refsource_VUPEN
- https://access.redhat.com/security/cve/CVE-2009-3376 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=511521 x_refsource_CONFIRM
- https://bugzilla.redhat.com/show_bug.cgi?id=530168 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2009-3376
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A11218 vdb-entrysignaturex_refsource_OVAL
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6541 vdb-entrysignaturex_refsource_OVAL
- https://www.cve.org/CVERecord?id=CVE-2009-3376
Change history (0)
No recorded changes yet.