The BN_from_montgomery function in crypto/bn/bn_mont.c in OpenSSL 0.9.8e and earlier does not properly perform Montgomery multiplication, which might allow local users to conduct a side-channel attack and retrieve RSA private keys.
総合評価: CVE-2007-3108 は低リスク（16.4/100）。CVSS 深刻度は低。悪用される可能性が高い（EPSS 0.41%、32 パーセンタイル） 推奨対応: 総合リスクは低く緊急対応は不要です。通常の保守サイクルでパッチを適用し、CVSS / EPSS が上昇したら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 | 2026-06-15 | 0.15% | 0.41% | +0.25% |
| 2 | 2026-03-27 | 0.15% | 0.15% | +0.01% |
| 3 | 2025-12-28 | — | 0.15% | — |
EPSS の全履歴 （全 12 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 |
|---|---|---|---|---|---|---|
| 1.2 | 2.0 | LOW |
|
1.9 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
low | CVE-2007-3108 low priority: Debian including 1 source packages (openssl), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2007-3108 |
gentoo
|
normal | CVE-2007-3108: 2 GLSA(s) (200710-06, 201412-11), 2 atom(s) (app-emulation/emul-linux-x86-baselibs, dev-libs/openssl); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2007-3108 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2007-3108 |
suse
|
medium | CVE-2007-3108 severity moderate: SUSE including 77 source package names (compat-openssl098, libopenssl-1_0_0-devel, …), 230 product×package rows across 36 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 6, … (36 product lines)): Known Not Affected 172, Fixed 58. | https://www.suse.com/security/cve/CVE-2007-3108/ |
ubuntu
|
negligible | CVE-2007-3108 negligible priority: Ubuntu including 2 source packages (openssl, openssl097), 18 status rows across 9 suites (dapper, edgy, feisty, gutsy, hardy, intrepid, jaunty, karmic, upstream): released 9, DNE 5, ignored 3, needs-triage 1. | https://ubuntu.com/security/CVE-2007-3108 |
This paper describes a possible side-channel attack that hasn’t been proven outside of a lab environment. In reality many factors would make this harder to exploit. If exploited, a local user could obtain RSA private keys (for example for web sites being run on the server). We have rated this as affecting Red Hat products with moderate security severity. Although the OpenSSL team have produced a patch for this issue, it is non-trivial and will require more testing before we can deploy it in a future update. Our current plan is as follows: - To include a backported fix in an OpenSSL update as part of Enterprise Linux 4.6. This will get testing via beta and give time for more extensive internal and upstream testing - To release an update for OpenSSL for other platforms at the same time as 4.6 is released http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=CVE-2007-3108