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.
総合評価: CVE-2017-13720 は低リスク(38.2/100)。CVSS 深刻度は高。悪用される可能性が高い(EPSS 0.10%、28 パーセンタイル) 推奨対応: 悪用情報と EPSS の推移を監視し、必要に応じて優先度を見直してください。
リスクは変動します。再評価に基づき、本ページの表示内容を更新しています。
EPSS は日次で悪用されやすさの相対度合いを推定します。パーセンタイルは採点済み CVE の中での相対位置(高いほど相対的に深刻)を示します。
| # | 日付 | 旧 EPSS スコア | 新 EPSS スコア | Δ(新 − 旧) |
|---|---|---|---|---|
| 1 | 2025-07-12 | 0.04% | 0.10% | +0.06% |
| 2 | 2025-03-30 | 0.10% | 0.04% | -0.06% |
| 3 | 2025-03-29 | — | 0.10% | — |
EPSS の全履歴 (全 7 件)
この CVE の CVSS 指標。
| ベーススコア | バージョン | 深刻度 | ベクトル | 悪用しやすさ | 影響 | スコアの出典 |
|---|---|---|---|---|---|---|
| 7.1 | 3.0 | HIGH |
|
1.8 | 5.2 | [email protected] |
| 3.6 | 2.0 | LOW |
|
3.9 | 4.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2017-13720 not yet assigned priority: Debian including 1 source packages (libxfont), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2017-13720 |
gentoo
|
normal | CVE-2017-13720: 1 GLSA(s) (201711-08), 2 atom(s) (x11-libs/libXfont, x11-libs/libXfont2); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2017-13720 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2017-13720 |
suse
|
medium | CVE-2017-13720 severity moderate: SUSE including 252 source package names (amazon/suse-sles-15-sp1-chost-byos-v20210304-hvm-ssd-x86_64, amazon/suse-sles-15-sp1-chost-byos-v20220127-hvm-ssd-x86_64, …), 375 product×package rows across 62 product lines (SUSE CaaS Platform 4.0, SUSE CaaS Platform 4.5, … (62 product lines)): Known Affected 231, Known Not Affected 93, Fixed 51. | https://www.suse.com/security/cve/CVE-2017-13720/ |
ubuntu
|
low | CVE-2017-13720 low priority: Ubuntu including 3 source packages (libxfont, libxfont1, libxfont2), 12 status rows across 4 suites (trusty, upstream, xenial, zesty): released 5, DNE 4, needs-triage 3. | https://ubuntu.com/security/CVE-2017-13720 |
| URL | タグ |
|---|---|
| http://www.debian.org/security/2017/dsa-3995 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1500690 | Issue Tracking Third Party Advisory |
| https://bugzilla.suse.com/show_bug.cgi?id=1054285 | Issue Tracking Third Party Advisory |
| https://cgit.freedesktop.org/xorg/lib/libXfont/commit/?id=d1e670a4a8704b8708e493ab6155589bcd570608 | Patch Third Party Advisory |
| https://security.gentoo.org/glsa/201711-08 | |
| https://www.x.org/releases/individual/lib/libXfont2-2.0.2.tar.bz2 | Vendor Advisory |