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Fencer Vulns
medium 4.3

CVE-2008-5508 json

Mozilla Firefox 3.x before 3.0.5 and 2.x before 2.0.0.19, Thunderbird 2.x before 2.0.0.19, and SeaMonkey 1.x before 1.1.14 does not properl…

published 2008-12-17 17 y ago modified 2026-06-16 4 mo ago also EUVD-2008-5485

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.2%
EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

Mozilla Firefox 3.x before 3.0.5 and 2.x before 2.0.0.19, Thunderbird 2.x before 2.0.0.19, and SeaMonkey 1.x before 1.1.14 does not properly parse URLs with leading whitespace or control characters, which might allow remote attackers to misrepresent URLs and simplify phishing attacks.

Patch / fix

  • mozilla firefox 2.0.0.19, 3.0.5
  • mozilla seamonkey 1.1.14
  • mozilla thunderbird 2.0.0.19
  • thunderbird RHEL 4 1.5.0.12-18.el4
  • thunderbird RHEL 5 PRODUCTIVITY, RHEL 5 2.0.0.19-1.el5_2
  • seamonkey RHEL 2.1 1.0.9-0.25.el2
  • seamonkey RHEL 3 1.0.9-0.29.el3
  • seamonkey RHEL 4 1.0.9-32.el4
  • seamonkey-nss RHEL 2.1 1.0.9-0.25.el2
  • seamonkey-nss RHEL 3 1.0.9-0.29.el3
  • seamonkey-chat RHEL 2.1 1.0.9-0.25.el2

red hat advisories RHSA-2009:0002RHSA-2008:1037RHSA-2008:1036

  • MozillaThunderbird openSUSE Tumbleweed 91.1.1-1.1

opensuse advisories openSUSE-SU-2024:10601-1

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-2008-5508 updated

Firefox errors parsing URLs with control characters

  • Red Hat Desktop version 3 seamonkey 1.0.9-0.29.el3, seamonkey-nss 1.0.9-0.29.el3, seamonkey-chat 1.0.9-0.29.el3, seamonkey-mail 1.0.9-0.29.el3, seamonkey-nspr 1.0.9-0.29.el3, seamonkey-js-debugger 1.0.9-0.29.el3, +1 more
    fixed: vendor fix RHSA-2008:1037
  • Red Hat Enterprise Linux (v. 5 server) nspr 4.7.3-2.el5, nss 3.12.2.0-2.el5, firefox 3.0.5-1.el5_2, nss-tools 3.12.2.0-2.el5, xulrunner 1.9.0.5-1.el5_2, xulrunner-devel-unstable 1.9.0.5-1.el5_2
    fixed: vendor fix RHSA-2008:1036
  • Red Hat Enterprise Linux AS (Advanced Server) version 2.1 seamonkey 1.0.9-0.25.el2, seamonkey-nss 1.0.9-0.25.el2, seamonkey-chat 1.0.9-0.25.el2, seamonkey-mail 1.0.9-0.25.el2, seamonkey-nspr 1.0.9-0.25.el2, seamonkey-js-debugger 1.0.9-0.25.el2, +1 more Red Hat Enterprise Linux AS version 3 seamonkey 1.0.9-0.29.el3, seamonkey-nss 1.0.9-0.29.el3, seamonkey-chat 1.0.9-0.29.el3, seamonkey-mail 1.0.9-0.29.el3, seamonkey-nspr 1.0.9-0.29.el3, seamonkey-js-debugger 1.0.9-0.29.el3, +1 more Red Hat Enterprise Linux AS version 4 nspr 4.7.3-1.el4, nss 3.12.2.0-1.el4, firefox 3.0.5-1.el4, seamonkey 1.0.9-32.el4, seamonkey-chat 1.0.9-32.el4, seamonkey-mail 1.0.9-32.el4, +3 more
    fixed: vendor fix RHSA-2008:1037
  • Red Hat Enterprise Linux Desktop (v. 5 client) nspr 4.7.3-2.el5, nss 3.12.2.0-2.el5, firefox 3.0.5-1.el5_2, nss-tools 3.12.2.0-2.el5, xulrunner 1.9.0.5-1.el5_2, thunderbird 2.0.0.19-1.el5_2, +1 more
    fixed: vendor fix RHSA-2008:1036
  • Red Hat Enterprise Linux Desktop version 4 nspr 4.7.3-1.el4, nss 3.12.2.0-1.el4, firefox 3.0.5-1.el4, seamonkey 1.0.9-32.el4, seamonkey-chat 1.0.9-32.el4, seamonkey-mail 1.0.9-32.el4, +3 more
    fixed: vendor fix RHSA-2008:1037
  • Red Hat Enterprise Linux Desktop Workstation (v. 5 client) nspr 4.7.3-2.el5, nss 3.12.2.0-2.el5, nss-tools 3.12.2.0-2.el5, xulrunner 1.9.0.5-1.el5_2, xulrunner-devel-unstable 1.9.0.5-1.el5_2
    fixed: vendor fix RHSA-2008:1036
  • Red Hat Enterprise Linux ES version 2.1 seamonkey 1.0.9-0.25.el2, seamonkey-nss 1.0.9-0.25.el2, seamonkey-chat 1.0.9-0.25.el2, seamonkey-mail 1.0.9-0.25.el2, seamonkey-nspr 1.0.9-0.25.el2, seamonkey-js-debugger 1.0.9-0.25.el2, +1 more Red Hat Enterprise Linux ES version 3 seamonkey 1.0.9-0.29.el3, seamonkey-nss 1.0.9-0.29.el3, seamonkey-chat 1.0.9-0.29.el3, seamonkey-mail 1.0.9-0.29.el3, seamonkey-nspr 1.0.9-0.29.el3, seamonkey-js-debugger 1.0.9-0.29.el3, +1 more Red Hat Enterprise Linux ES version 4 nspr 4.7.3-1.el4, nss 3.12.2.0-1.el4, firefox 3.0.5-1.el4, seamonkey 1.0.9-32.el4, seamonkey-chat 1.0.9-32.el4, seamonkey-mail 1.0.9-32.el4, +3 more
    fixed: vendor fix RHSA-2008:1037
  • Red Hat Enterprise Linux Optional Productivity Applications (v. 5 server) thunderbird 2.0.0.19-1.el5_2
    fixed: vendor fix RHSA-2009:0002
show 1 more
  • Red Hat Enterprise Linux WS version 2.1 seamonkey 1.0.9-0.25.el2, seamonkey-nss 1.0.9-0.25.el2, seamonkey-chat 1.0.9-0.25.el2, seamonkey-mail 1.0.9-0.25.el2, seamonkey-nspr 1.0.9-0.25.el2, seamonkey-js-debugger 1.0.9-0.25.el2, +1 more Red Hat Enterprise Linux WS version 3 seamonkey 1.0.9-0.29.el3, seamonkey-nss 1.0.9-0.29.el3, seamonkey-chat 1.0.9-0.29.el3, seamonkey-mail 1.0.9-0.29.el3, seamonkey-nspr 1.0.9-0.29.el3, seamonkey-js-debugger 1.0.9-0.29.el3, +1 more Red Hat Enterprise Linux WS version 4 nspr 4.7.3-1.el4, nss 3.12.2.0-1.el4, firefox 3.0.5-1.el4, seamonkey 1.0.9-32.el4, seamonkey-chat 1.0.9-32.el4, seamonkey-mail 1.0.9-32.el4, +3 more Red Hat Linux Advanced Workstation 2.1 seamonkey 1.0.9-0.25.el2, seamonkey-nss 1.0.9-0.25.el2, seamonkey-chat 1.0.9-0.25.el2, seamonkey-mail 1.0.9-0.25.el2, seamonkey-nspr 1.0.9-0.25.el2, seamonkey-js-debugger 1.0.9-0.25.el2, +1 more
    fixed: vendor fix RHSA-2008:1037

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

Exploit prediction

2.22% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns 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.