The s_mp_div function in lib/freebl/mpi/mpi.c in Mozilla Network Security Services (NSS) before 3.21, as used in Mozilla Firefox before 44.0, improperly divides numbers, which might make it easier for remote attackers to defeat cryptographic protection mechanisms by leveraging use of the (1) mp_div or (2) mp_exptmod function.
総合評価: CVE-2016-1938 は中リスク(53.5/100)。CVSS 深刻度は中。悪用される可能性が高い(EPSS 1.05%、77 パーセンタイル) 推奨対応: 影響資産を整理し、修補計画に組み込んでください。
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 | 2026-03-02 | 0.59% | 1.05% | +0.46% |
| 2 | 2026-01-06 | 1.06% | 0.59% | -0.47% |
| 3 | 2025-12-07 | — | 1.06% | — |
EPSS の全履歴 (全 11 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 |
|---|---|---|---|---|---|---|
| 6.5 | 3.0 | MEDIUM |
|
3.9 | 2.5 | [email protected] |
| 6.4 | 2.0 | MEDIUM |
|
10.0 | 4.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2016-1938 not yet assigned priority: Debian including 1 source packages (nss), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2016-1938 |
gentoo
|
normal | CVE-2016-1938: 2 GLSA(s) (201605-06, 201701-46), 6 atom(s) (dev-libs/nspr, dev-libs/nss, mail-client/thunderbird, mail-client/thunderbird-bin, www-client/firefox, www-client/firefox-bin); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2016-1938 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2016-1938 |
suse
|
medium | CVE-2016-1938 severity moderate: SUSE including 158 source package names (MozillaFirefox-102.11.0-150200.152.87.1, MozillaFirefox-115.10.0-150200.152.134.1, …), 448 product×package rows across 67 product lines (Image SLES12-SP5-Azure-BYOS, Image SLES12-SP5-Azure-Basic-On-Demand, … (67 product lines)): Fixed 448. | https://www.suse.com/security/cve/CVE-2016-1938/ |
ubuntu
|
medium | CVE-2016-1938 medium priority: Ubuntu including 3 source packages (firefox, nss, thunderbird), 24 status rows across 8 suites (precise, trusty, upstream, vivid, wily, xenial, yakkety, zesty): released 19, not-affected 3, ignored 2. | https://ubuntu.com/security/CVE-2016-1938 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| opensuse | leap | 42.1 | cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:* |
| opensuse | opensuse | 13.1 | cpe:2.3:o:opensuse:opensuse:13.1:*:*:*:*:*:*:* |
| opensuse | opensuse | 13.2 | cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:* |
| mozilla | nss | <= 3.20.1 | cpe:2.3:a:mozilla:nss:*:*:*:*:*:*:*:* |
| mozilla | firefox | <= 43.0.4 | cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* |