MEDIUM
Firefox URL spoofing with invalid unicode characters
Published Jun 12, 2009
4.3
MEDIUMCVSS 2.0
EPSS 3.23%
Description
Visual truncation vulnerability in netwerk/dns/src/nsIDNService.cpp in Mozilla Firefox before 3.0.11 and SeaMonkey before 1.1.17 allows remote attackers to spoof the location bar via an IDN with invalid Unicode characters that are displayed as whitespace, as demonstrated by the \u115A through \u115E characters.
Affected products
No data.
OR
- ≤ 3.0.10
- 0.1
- 0.2
- 0.3
- 0.4
- 0.5
- 0.6
- 0.6.1
- 0.7
- 0.7.1
- 0.8
- 0.9
- 0.9
- 0.9.1
- 0.9.2
- 0.9.3
- 0.9_rc
- 0.10
- 0.10.1
- 1.0
- 1.0
- 1.0.1
- 1.0.2
- 1.0.3
- 1.0.4
- 1.0.5
- 1.0.6
- 1.0.6
- 1.0.7
- 1.0.8
- 1.4.1
- 1.5
- 1.5
- 1.5
- 1.5.0.1
- 1.5.0.2
- 1.5.0.3
- 1.5.0.4
- 1.5.0.5
- 1.5.0.6
- 1.5.0.7
- 1.5.0.8
- 1.5.0.9
- 1.5.0.10
- 1.5.0.11
- 1.5.0.12
- 1.5.1
- 1.5.2
- 1.5.3
- 1.5.4
- 1.5.5
- 1.5.6
- 1.5.7
- 1.5.8
- 1.8
- 2.0
- 2.0
- 2.0
- 2.0
- 2.0
- 2.0.0.1
- 2.0.0.2
- 2.0.0.3
- 2.0.0.4
- 2.0.0.5
- 2.0.0.6
- 2.0.0.7
- 2.0.0.8
- 2.0.0.9
- 2.0.0.10
- 2.0.0.11
- 2.0.0.12
- 2.0.0.13
- 2.0.0.14
- 2.0.0.15
- 2.0.0.16
- 2.0.0.17
- 2.0.0.18
- 2.0.0.19
- 2.0.0.20
- 2.0.0.21
- 2.0_.1
- 2.0_.4
- 2.0_.5
- 2.0_.6
- 2.0_.7
- 2.0_.9
- 2.0_.10
- 2.0_8
- 3.0
- 3.0
- 3.0
- 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
- ≤ 1.1.16
- 1.0
- 1.0
- 1.0
- 1.0
- 1.0
- 1.0
- 1.0.1
- 1.0.3
- 1.0.4
- 1.0.6
- 1.0.8
- 1.0.9
- 1.0.99
- 1.1
- 1.1
- 1.1
- 1.1.1
- 1.1.3
- 1.1.5
- 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
- 1.1.15
No data.
Red Hat Enterprise Linux 4
firefox-0:3.0.11-4.el4
Fixed · RHSA-2009:1095
Red Hat Enterprise Linux 5
firefox-0:3.0.11-2.el5_3
Fixed · RHSA-2009:1095
Red Hat Enterprise Linux 5
xulrunner-0:1.9.0.11-3.el5_3
Fixed · RHSA-2009:1095
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | firefox-0:3.0.11-4.el4 | Fixed | RHSA-2009:1095 |
| Red Hat Enterprise Linux 5 | firefox-0:3.0.11-2.el5_3 | Fixed | RHSA-2009:1095 |
| Red Hat Enterprise Linux 5 | xulrunner-0:1.9.0.11-3.el5_3 | Fixed | RHSA-2009:1095 |
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.
4.3 MEDIUM NVD
AV:N/AC:M/Au:N/C:N/I:P/A:N
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
3.23% 0.03234
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
EPSS probability 0.03234
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 (14 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 3.23% (0.03234) | 87.84th | v5 (v2026.06.15) |
| Jun 15, 2026 | 3.23% (0.03234) | 86.60th | v5 (v2026.06.15) |
| Jan 31, 2026 | 11.37% (0.11374) | 93.37th | v4 (v2025.03.14) |
| Mar 30, 2025 | 15.05% (0.15054) | 94.00th | v4 (v2025.03.14) |
| Mar 29, 2025 | 24.73% (0.24729) | 93.76th | v4 (v2025.03.14) |
| Mar 19, 2025 | 15.05% (0.15054) | 93.77th | v4 (v2025.03.14) |
| Mar 17, 2025 | 16.81% (0.16813) | 94.44th | v4 (v2025.03.14) |
| Dec 17, 2024 | 19.99% (0.19986) | 96.33th | v3 (v2023.03.01) |
| Jan 21, 2024 | 11.39% (0.11395) | 94.70th | v3 (v2023.03.01) |
| May 1, 2023 | 8.38% (0.08382) | 93.40th | v3 (v2023.03.01) |
| Mar 7, 2023 | 8.32% (0.08316) | 93.34th | v3 (v2023.03.01) |
| Mar 6, 2023 | 12.57% (0.12567) | 95.52th | v2 (v2022.01.01) |
| Apr 1, 2022 | 12.57% (0.12567) | 95.18th | v2 (v2022.01.01) |
| Feb 4, 2022 | 12.57% (0.12567) | 90.03th | v2 (v2022.01.01) |
Weaknesses (1)
References (22)
- http://osvdb.org/55162 vdb-entryx_refsource_OSVDB
- http://secunia.com/advisories/35331 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/35415 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/35431 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/35439 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://secunia.com/advisories/35468 third-party-advisoryx_refsource_SECUNIA
- http://slackware.com/security/viewer.php?l=slackware-security&y=2009&m=slackware-security.372468 vendor-advisoryx_refsource_SLACKWARE
- http://sunsolve.sun.com/search/document.do?assetkey=1-66-264308-1 vendor-advisoryx_refsource_SUNALERT
- http://www.debian.org/security/2009/dsa-1820 vendor-advisoryx_refsource_DEBIAN
- http://www.mozilla.org/security/announce/2009/mfsa2009-25.html x_refsource_CONFIRMVendor Advisory
- http://www.securityfocus.com/bid/35326 vdb-entryx_refsource_BID
- http://www.securityfocus.com/bid/35388 vdb-entryx_refsource_BID
- http://www.vupen.com/english/advisories/2009/1572 vdb-entryx_refsource_VUPENPatchVendor Advisory
- https://access.redhat.com/security/cve/CVE-2009-1834 Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=479413 x_refsource_CONFIRMExploit
- https://bugzilla.redhat.com/show_bug.cgi?id=503573 x_refsource_CONFIRMIssue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2009-1834
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10436 vdb-entrysignaturex_refsource_OVAL
- https://rhn.redhat.com/errata/RHSA-2009-1095.html vendor-advisoryx_refsource_REDHAT
- https://www.cve.org/CVERecord?id=CVE-2009-1834
- https://www.redhat.com/archives/fedora-package-announce/2009-June/msg00574.html vendor-advisoryx_refsource_FEDORA
- https://www.redhat.com/archives/fedora-package-announce/2009-June/msg00657.html vendor-advisoryx_refsource_FEDORA
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner redhat
Published Jun 12, 2009
Updated Aug 7, 2024
Reserved May 29, 2009
Link CVE-2009-1834
CISA Vulnrichment
Updated n/a