GHSA-vfp6-jrw2-99g9 · 深刻度： low · エコシステム： go — Cosign vulnerable to possible endless data attack from attacker-controlled registry
Cosign is a sigstore signing tool for OCI containers. Cosign is susceptible to a denial of service by an attacker controlled registry. An attacker who controls a remote registry can return a high number of attestations and/or signatures to Cosign and cause Cosign to enter a long loop resulting in an endless data attack. The root cause is that Cosign loops through all attestations fetched from the remote registry in pkg/cosign.FetchAttestations. The attacker needs to compromise the registry or make a request to a registry they control. When doing so, the attacker must return a high number of attestations in the response to Cosign. The result will be that the attacker can cause Cosign to go into a long or infinite loop that will prevent other users from verifying their data. In Kyvernos case, an attacker whose privileges are limited to making requests to the cluster can make a request with an image reference to their own registry, trigger the infinite loop and deny other users from completing their admission requests. Alternatively, the attacker can obtain control of the registry used by an organization and return a high number of attestations instead the expected number of attestations. The issue can be mitigated rather simply by setting a limit to the limit of attestations that Cosign will loop through. The limit does not need to be high to be within the vast majority of use cases and still prevent the endless data attack. This issue has been patched in version 2.2.1 and users are advised to upgrade.
総合評価: CVE-2023-46737 は公開エクスプロイトあり（50/100）。CVSS 深刻度は低。悪用される可能性が高い（EPSS 0.64%、46 パーセンタイル） 根拠: 公開エクスプロイトが 1 件参照されています（Exploit-DB）。 推奨対応: 公開エクスプロイトが確認されています。影響範囲の確認、緩和策の適用、パッチ適用を優先してください。
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。
| EDB-ID | ソース | 種別 | 公開 | リンク |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
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 | 0.31% | 0.64% | +0.33% |
| 2 | 2025-11-25 | 0.23% | 0.31% | +0.08% |
| 3 | 2025-11-21 | — | 0.23% | — |
EPSS の全履歴 （全 10 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 |
|---|---|---|---|---|---|---|
| 3.1 | 3.1 | LOW |
|
1.6 | 1.4 | [email protected] |
| 5.3 | 3.1 | MEDIUM |
|
3.9 | 1.4 | [email protected] |
GHSA-vfp6-jrw2-99g9 · 深刻度： low · エコシステム： go — Cosign vulnerable to possible endless data attack from attacker-controlled registry
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
medium | CVE-2023-46737: 1 source package rows (cosign); 12 state rows across 6 repos (3.18-community, 3.19-community, 3.20-community, 3.21-community, 3.22-community, edge-community); fixed 5, open 7. | https://security.alpinelinux.org/vuln/CVE-2023-46737 |
debian
|
unimportant | CVE-2023-46737 unimportant priority: Debian including 1 source packages (cosign), 3 status rows across 3 suites (forky, sid, trixie): resolved 3. | https://security-tracker.debian.org/tracker/CVE-2023-46737 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2023-46737 |
suse
|
medium | — | https://www.suse.com/security/cve/CVE-2023-46737/ |