Debian DSA-2309-1 : openssl - compromised certificate authority

low Nessus プラグイン ID 56179
New! プラグインの深刻度には CVSS v3 が適用されるようになりました。

プラグインの深刻度は、デフォルトで CVSS v3 を使って計算されるように更新されました。プラグインに CVSS v3 スコアがない場合には、CVSS v2 を使って深刻度が計算されます。深刻度の表示設定は、[設定]のドロップダウンで切り替えができます。

概要

The remote Debian host is missing a security-related update.

説明

Several fraudulent SSL certificates have been found in the wild issued by the DigiNotar Certificate Authority, obtained through a security compromise of said company. After further updates on this incident, it has been determined that all of DigiNotar's signing certificates can no longer be trusted. Debian, like other software distributors and vendors, has decided to distrust all of DigiNotar's CAs. In this update, this is done in the crypto library (a component of the OpenSSL toolkit) by marking such certificates as revoked. Any application that uses said component should now reject certificates signed by DigiNotar. Individual applications may allow users to override the validation failure. However, making exceptions is highly discouraged and should be carefully verified.

Additionally, a vulnerability has been found in the ECDHE_ECDS cipher where timing attacks make it easier to determine private keys. The Common Vulnerabilities and Exposures project identifies it as CVE-2011-1945.

ソリューション

Upgrade the openssl packages.

For the oldstable distribution (lenny), these problems have been fixed in version 0.9.8g-15+lenny12.

For the stable distribution (squeeze), these problems have been fixed in version 0.9.8o-4squeeze2.

関連情報

https://security-tracker.debian.org/tracker/CVE-2011-1945

https://packages.debian.org/source/squeeze/openssl

https://www.debian.org/security/2011/dsa-2309

プラグインの詳細

深刻度: Low

ID: 56179

ファイル名: debian_DSA-2309.nasl

バージョン: 1.14

タイプ: local

エージェント: unix

公開日: 2011/9/14

更新日: 2021/1/11

依存関係: ssh_get_info.nasl

リスク情報

VPR

リスクファクター: Low

スコア: 2.5

CVSS v2

リスクファクター: Low

Base Score: 2.6

Temporal Score: 1.9

ベクトル: AV:N/AC:H/Au:N/C:P/I:N/A:N

現状ベクトル: E:U/RL:OF/RC:C

脆弱性情報

CPE: p-cpe:/a:debian:debian_linux:openssl, cpe:/o:debian:debian_linux:5.0, cpe:/o:debian:debian_linux:6.0

必要な KB アイテム: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

エクスプロイトの容易さ: No known exploits are available

パッチ公開日: 2011/9/13

参照情報

CVE: CVE-2011-1945

BID: 47888

DSA: 2309