Description
Several fonts on OS X display some Tibetan and Arabic characters as whitespace. When used in the addressbar as part of an IDN this can be used for domain name spoofing attacks. Note: This attack only affects OS X operating systems. Other operating systems are unaffected. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 56 | 56 |
| Mozilla | Firefox ESR | unspecified – < 52.4 | 52.4 |
| Mozilla | Thunderbird | unspecified – < 52.4 | 52.4 |
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.
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP3 | MozillaFirefox | 52.4.0esr-109.6.2 | SUSE-SU-2017:2688-1 |
| SLES 12 SP3 | mozilla-nss | 3.29.5-58.3.1 | SUSE-SU-2017:2688-1 |
| SLES 12 SP2 | MozillaFirefox | 52.4.0esr-109.6.2 | SUSE-SU-2017:2688-1 |
| SLES 12 SP2 | mozilla-nss | 3.29.5-58.3.1 | SUSE-SU-2017:2688-1 |
| SLES 12 SP1 | MozillaFirefox | 52.4.0esr-109.6.2 | SUSE-SU-2017:2688-1 |
| SLES 12 SP1 | mozilla-nss | 3.29.5-58.3.1 | SUSE-SU-2017:2688-1 |
| SLES 12 | MozillaFirefox | 52.4.0esr-109.6.2 | SUSE-SU-2017:2688-1 |
| SLES 12 | mozilla-nss | 3.29.5-58.3.1 | SUSE-SU-2017:2688-1 |
| SLES 11 SP4 | MozillaFirefox | 52.4.0esr-72.13.2 | SUSE-SU-2017:2872-2, SUSE-SU-2017:2872-1 |
| SLES 11 SP4 | mozilla-nss | 3.29.5-47.6.1 | SUSE-SU-2017:2872-2, SUSE-SU-2017:2872-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 11 SP3 | MozillaFirefox | 52.4.0esr-72.13.2 | SUSE-SU-2017:2872-2, SUSE-SU-2017:2872-1 |
| SLES 11 SP3 | mozilla-nss | 3.29.5-47.6.1 | SUSE-SU-2017:2872-2, SUSE-SU-2017:2872-1 |
| SLES for SAP 12 SP3 | MozillaFirefox | 52.4.0esr-109.6.2 | SUSE-SU-2017:2688-1 |
| SLES for SAP 12 SP3 | mozilla-nss | 3.29.5-58.3.1 | SUSE-SU-2017:2688-1 |
| SLES for SAP 12 SP2 | MozillaFirefox | 52.4.0esr-109.6.2 | SUSE-SU-2017:2688-1 |
| SLES for SAP 12 SP2 | mozilla-nss | 3.29.5-58.3.1 | SUSE-SU-2017:2688-1 |
| SLES for SAP 12 SP1 | MozillaFirefox | 52.4.0esr-109.6.2 | SUSE-SU-2017:2688-1 |
| SLES for SAP 12 SP1 | mozilla-nss | 3.29.5-58.3.1 | SUSE-SU-2017:2688-1 |
| SLES for SAP 11 SP4 | MozillaFirefox | 52.4.0esr-72.13.2 | SUSE-SU-2017:2872-2, SUSE-SU-2017:2872-1 |
| SLES for SAP 11 SP4 | mozilla-nss | 3.29.5-47.6.1 | SUSE-SU-2017:2872-2, SUSE-SU-2017:2872-1 |
| SUSE Package Hub 12 | MozillaThunderbird | 52.4.0-45.1 | openSUSE-SU-2017:2710-1, openSUSE-SU-2017:2707-1 |
| SUSE OpenStack Cloud 6 | MozillaFirefox | 52.4.0esr-109.6.2 | SUSE-SU-2017:2688-1 |
| SUSE OpenStack Cloud 6 | mozilla-nss | 3.29.5-58.3.1 | SUSE-SU-2017:2688-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | MozillaFirefox | 52.4.0esr-72.13.2 | SUSE-SU-2017:2872-1 |
| SUSE Linux Enterprise Point of Sale 11 SP3 | mozilla-nss | 3.29.5-47.6.1 | SUSE-SU-2017:2872-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 92.0-1.2 | openSUSE-SU-2024:10600-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 91.1.1-1.1 | openSUSE-SU-2024:10601-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
Advisories 8
- SUSE-SU-2017:2872-1 Security update for MozillaFirefox, mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2872-2 Security update for MozillaFirefox, mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2017:2710-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2017:2688-1 Security update for MozillaFirefox, mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10600-1 MozillaFirefox-92.0-1.2 on GA media 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-2017:2707-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · May 7, 2025
- openSUSE-SU-2024:10601-1 MozillaThunderbird-91.1.1-1.1 on GA media SUSE / openSUSE Security Updates · May 7, 2025
References
- 101059 vdb-entry
- [debian-lts-announce] 20171101 [SECURITY] [DLA 1153-1] icedove/thunderbird security update mailing-list
- https://www.mozilla.org/security/advisories/mfsa2017-22/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1393624
- 1039465 vdb-entry
- https://www.mozilla.org/security/advisories/mfsa2017-21/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1390980
- https://www.mozilla.org/security/advisories/mfsa2017-23/
- GLSA-201803-14 vendor-advisory