In the PatternMatch function in fontfile/fontdir.c in libXfont through 1.5.2 and 2.x before 2.0.2, an attacker with access to an X connection can cause a buffer over-read during pattern matching of fonts, leading to information disclosure or a crash (denial of service). This occurs because '\0' characters are incorrectly skipped in situations involving ? characters.
CVSS Details
- CVSS 3.0 Base Score: 7.1
- CVSS 3.0 Vector: (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | debian-upgrade-libxfont | Oct 11, 2017 | Oct 10, 2017 | |
| Freebsd | freebsd-upgrade-package-libxfontfreebsd-upgrade-package-libxfont2 | Dec 20, 2017 | Dec 17, 2017 | |
| Gentoo Linux | gentoo-linux-upgrade-x11-libs-libxfontgentoo-linux-upgrade-x11-libs-libxfont2 | Nov 13, 2017 | Oct 11, 2017 | |
| Huawei Euleros 2_0_sp2 | huawei-euleros-2_0_sp2-upgrade-libxfont | Dec 4, 2019 | Oct 11, 2017 | |
| Huawei Euleros 2_0_sp3 | huawei-euleros-2_0_sp3-upgrade-libxfont | Dec 18, 2019 | Oct 11, 2017 | |
| Huawei Euleros 2_0_sp5 | huawei-euleros-2_0_sp5-upgrade-libxfont | Dec 11, 2019 | Oct 11, 2017 | |
| Redhat_linux | no-fix-redhat-rpm-package | Jul 9, 2025 | Oct 4, 2017 | |
| Suse | — | suse-upgrade-libxfont-develsuse-upgrade-libxfont1suse-upgrade-xorg-x11-develsuse-upgrade-xorg-x11-devel-32bitsuse-upgrade-xorg-x11-libssuse-upgrade-xorg-x11-libs-32bitsuse-upgrade-xorg-x11-libs-x86 | Dec 9, 2017 | Oct 10, 2017 |
| Ubuntu | ubuntu-upgrade-libxfont1ubuntu-upgrade-libxfont2 | Oct 10, 2017 | Oct 10, 2017 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub