All versions of Quagga, 0.93 through 1.1.0, are vulnerable to an unbounded memory allocation in the telnet 'vty' CLI, leading to a Denial-of-Service of Quagga daemons, or even the entire host. When Quagga daemons are configured with their telnet CLI enabled, anyone who can connect to the TCP ports can trigger this vulnerability, prior to authentication. Most distributions restrict the Quagga telnet interface to local access only by default. The Quagga telnet interface 'vty' input buffer grows automatically, without bound, so long as a newline is not entered. This allows an attacker to cause the Quagga daemon to allocate unbounded memory by sending very long strings without a newline. Eventually the daemon is terminated by the system, or the system itself runs out of memory. This is fixed in Quagga 1.1.1 and Free Range Routing (FRR) Protocol Suite 2017-01-10.
総合評価: CVE-2017-5495 は高リスク(68.9/100)。CVSS 深刻度は高。悪用される可能性が高い(EPSS 18.80%、97 パーセンタイル) 根拠: EPSS 上、短期間での悪用可能性は高い水準です。 直近 1 日で EPSS が +15.04% 上昇。悪用への関心が高まっている可能性があります。 推奨対応: 悪用可能性が高いため、影響範囲の確認と修補の優先付けを推奨します。
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 | 3.76% | 18.80% | +15.04% |
| 2 | 2026-05-29 | 6.87% | 3.76% | -3.12% |
| 3 | 2026-05-26 | — | 6.87% | — |
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 |
|---|---|---|---|---|---|---|
| 7.5 | 3.0 | HIGH |
|
3.9 | 3.6 | [email protected] |
| 7.8 | 2.0 | HIGH |
|
10.0 | 6.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2017-5495: 1 source package rows (quagga); 10 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 10, open 0. | https://security.alpinelinux.org/vuln/CVE-2017-5495 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2017-5495 |
suse
|
medium | CVE-2017-5495 severity moderate: SUSE including 37 source package names (libfpm_pb0, libfpm_pb0-1.1.1-17.3.3, …), 170 product×package rows across 43 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 6, … (43 product lines)): Fixed 108, Known Not Affected 62. | https://www.suse.com/security/cve/CVE-2017-5495/ |
ubuntu
|
low | CVE-2017-5495 low priority: Ubuntu including 1 source packages (quagga), 7 status rows across 7 suites (artful, precise, trusty, upstream, xenial, yakkety, zesty): released 3, ignored 2, not-affected 2. | https://ubuntu.com/security/CVE-2017-5495 |