Description
Mozilla Firefox before 42.0 and Firefox ESR 38.x before 38.4 allow remote attackers to bypass the Same Origin Policy for an IP address origin, and conduct cross-site scripting (XSS) attacks, by appending whitespace characters to an IP address string.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 8 | icedove | 38.4.0-1~deb8u1 | DSA-3410-1 |
| Debian 8 | iceweasel | 38.4.0esr-1~deb8u1 | DSA-3393-1 |
| Debian 7 | icedove | 38.4.0-1~deb7u1 | DSA-3410-1 |
| Debian 7 | iceweasel | 38.4.0esr-1~deb7u1 | DSA-3393-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | firefox | 42.0+build2-0ubuntu0.14.04.1 | USN-2785-1 |
| Ubuntu 14.04 LTS | thunderbird | 1:38.4.0+build3-0ubuntu0.14.04.1 | USN-2819-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | firefox | 38.4.0-1.el7_1 | RHSA-2015:1982 |
| RHEL 6 | firefox | 38.4.0-1.el6_7 | RHSA-2015:1982 |
| RHEL 5 | firefox | 38.4.0-1.el5_11 | RHSA-2015:1982 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | MozillaFirefox | 38.4.0esr-51.1 | SUSE-SU-2015:1926-1 |
| SLES 12 | MozillaFirefox-branding-SLE | 31.0-17.1 | SUSE-SU-2015:1926-1 |
| SLES 12 | mozilla-nspr | 4.10.10-9.1 | SUSE-SU-2015:1926-1 |
| SLES 12 | mozilla-nss | 3.19.2.1-29.1 | SUSE-SU-2015:1926-1 |
| SLES 11 SP4 | MozillaFirefox | 38.4.0esr-25.6 | SUSE-SU-2015:1981-1 |
| SLES 11 SP4 | MozillaFirefox-branding-SLED | 38-15.31 | SUSE-SU-2015:1981-1 |
| SLES 11 SP4 | mozilla-nspr | 4.10.10-16.1 | SUSE-SU-2015:1981-1 |
| SLES 11 SP4 | mozilla-nss | 3.19.2.1-19.3 | SUSE-SU-2015:1981-1 |
| SLES 11 SP3 | MozillaFirefox | 38.4.0esr-25.6 | SUSE-SU-2015:1981-1 |
| SLES 11 SP3 | MozillaFirefox-branding-SLED | 38-15.31 | SUSE-SU-2015:1981-1 |
| SLES 11 SP3 | mozilla-nspr | 4.10.10-16.1 | SUSE-SU-2015:1981-1 |
| SLES 11 SP3 | mozilla-nss | 3.19.2.1-19.3 | SUSE-SU-2015:1981-1 |
| SLES 11 SP2 | MozillaFirefox | 38.4.0esr-25.3 | SUSE-SU-2015:1978-1 |
| SLES 11 SP2 | MozillaFirefox-branding-SLED | 38-12.19 | SUSE-SU-2015:1978-1 |
| SLES 11 SP2 | mozilla-nspr | 4.10.10-16.1 | SUSE-SU-2015:1978-1 |
| SLES 11 SP2 | mozilla-nss | 3.19.2.1-12.1 | SUSE-SU-2015:1978-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 | MozillaFirefox | 38.4.0esr-51.1 | SUSE-SU-2015:1926-1 |
| SLES for SAP 12 | MozillaFirefox-branding-SLE | 31.0-17.1 | SUSE-SU-2015:1926-1 |
| SLES for SAP 12 | mozilla-nspr | 4.10.10-9.1 | SUSE-SU-2015:1926-1 |
| SLES for SAP 12 | mozilla-nss | 3.19.2.1-29.1 | SUSE-SU-2015:1926-1 |
| SLES for SAP 11 SP4 | MozillaFirefox | 38.4.0esr-25.6 | SUSE-SU-2015:1981-1 |
| SLES for SAP 11 SP4 | MozillaFirefox-branding-SLED | 38-15.31 | SUSE-SU-2015:1981-1 |
| SLES for SAP 11 SP4 | mozilla-nspr | 4.10.10-16.1 | SUSE-SU-2015:1981-1 |
| SLES for SAP 11 SP4 | mozilla-nss | 3.19.2.1-19.3 | SUSE-SU-2015:1981-1 |
| SLES for SAP 11 SP3 | MozillaFirefox | 38.4.0esr-25.6 | SUSE-SU-2015:1981-1 |
| SLES for SAP 11 SP3 | MozillaFirefox-branding-SLED | 38-15.31 | SUSE-SU-2015:1981-1 |
| SLES for SAP 11 SP3 | mozilla-nspr | 4.10.10-16.1 | SUSE-SU-2015:1981-1 |
| SLES for SAP 11 SP3 | mozilla-nss | 3.19.2.1-19.3 | SUSE-SU-2015:1981-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 50.1.0-1.1 | openSUSE-SU-2024:10071-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 45.5.1-1.1 | openSUSE-SU-2024:10230-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | firefox | 38.4.0-1.0.1.el7_1 | ELSA-2015-1982 |
Advisories 12
- RHSA-2015:1982 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-2819-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-2785-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-3410-1 icedove - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3393-1 iceweasel - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2015:1981-1 Security update for MozillaFirefox, mozilla-nspr, mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10230-1 MozillaThunderbird-45.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1978-1 Security update for MozillaFirefox, mozilla-nspr, mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:1926-1 Security update for MozillaFirefox, mozilla-nspr, mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14572-1 firefox-esr-128.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10071-1 MozillaFirefox-50.1.0-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
- ELSA-2015-1982 Critical: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 4, 2015
References
- 1034069 vdb-entry
- DSA-3410 vendor-advisory
- SUSE-SU-2015:2081 vendor-advisory
- GLSA-201512-10 vendor-advisory
- 77411 vdb-entry
- SUSE-SU-2015:1981 vendor-advisory
- http://www.mozilla.org/security/announce/2015/mfsa2015-122.html
- openSUSE-SU-2015:2229 vendor-advisory
- USN-2785-1 vendor-advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1199430
- SUSE-SU-2015:1926 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- RHSA-2015:1982 vendor-advisory
- USN-2819-1 vendor-advisory
- openSUSE-SU-2015:1942 vendor-advisory
- DSA-3393 vendor-advisory
- openSUSE-SU-2015:2245 vendor-advisory
- SUSE-SU-2015:1978 vendor-advisory