CVE-2011-4862

Exp

Buffer overflow in libtelnet/encrypt.c in telnetd in FreeBSD 7.3 through 9.0, MIT Kerberos Version 5 Applications (aka krb5-appl) 1.0.2 and earlier, Heimdal 1.5.1 and earlier, GNU inetutils, and possibly other products allows remote attackers to execute arbitrary code via a long encryption key, as exploited in the wild in December 2011.

公開： 2011-12-25 最終更新： 2026-04-29 Assigner： [email protected] ソース： [email protected]
NVD ステータス：Modified，CVE の状態： published
参照： NVD, CVE.org, EUVD, JVN

CVE-2011-4862 は悪用リスクが高い（89.7/100）。CVSS 深刻度は重大。悪用される可能性が高い（EPSS 92.38%、100 パーセンタイル） 公開エクスプロイトが 4 件参照されています（Exploit-DB）。 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。

CVE-2011-4862 に関する公開 exploit 参照（Exploit-DB）

EDB-ID ソース 種別 公開 リンク
18368 exploit_db edb 2012-01-14 Exploit-DB ↗
18369 exploit_db edb 2012-01-14 Exploit-DB ↗
18280 exploit_db edb 2011-12-26 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

CVE-2011-4862 の EPSS（Exploit Prediction Scoring System）スコア

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 2026-06-13 92.58% 92.38% -0.20%
2 2025-12-01 92.41% 92.58% +0.18%
3 2025-09-08 — 92.41% —

EPSS の全履歴 （全 17 件）

CVE-2011-4862 の CVSS（Common Vulnerability Scoring System）指標

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
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C クリックして展開
アクセス経路 (AV:N)
ルーティング可能なネットワーク越しに、遠隔から到達・悪用しうる。
アクセスの複雑さ (AC:L)
手順が短く、再現性が高い。
認証 (AU:N)
認証を経ずに攻撃を完結できる。
機密性への影響 (C:C)
機密性は全面的に損なわれる。
完全性への影響 (I:C)
完全性は全面的に損なわれる。
可用性への影響 (A:C)
可用性は全面的に損なわれる。
 10.0 10.0 [email protected]

CVE-2011-4862 の弱点分類（列挙）

CVE-2011-4862 の OS トラッカー

vendor priority summary link
debian high CVE-2011-4862 high priority: Debian including 3 source packages (heimdal, inetutils, krb5), 15 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 15. https://security-tracker.debian.org/tracker/CVE-2011-4862
gentoo high CVE-2011-4862: 2 GLSA(s) (201201-14, 201202-05), 2 atom(s) (app-crypt/heimdal, app-crypt/mit-krb5-appl); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-4862
redhat critical — https://access.redhat.com/security/cve/CVE-2011-4862
ubuntu medium CVE-2011-4862 medium priority: Ubuntu including 4 source packages (heimdal, inetutils, krb5, krb5-appl), 68 status rows across 17 suites (hardy, lucid, maverick, natty, oneiric, precise, quantal, raring, saucy, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): not-affected 31, ignored 25, DNE 8, needs-triage 2, released 2. https://ubuntu.com/security/CVE-2011-4862

CVE-2011-4862 の影響を受けるソフトウェア／構成

ベンダー 製品 バージョン 生の CPE
gnu inetutils < 1.9 cpe:2.3:a:gnu:inetutils:*:*:*:*:*:*:*:*
heimdal_project heimdal <= 1.5.1 cpe:2.3:a:heimdal_project:heimdal:*:*:*:*:*:*:*:*
mit krb5-appl <= 1.0.2 cpe:2.3:a:mit:krb5-appl:*:*:*:*:*:*:*:*
freebsd freebsd >= 7.3, <= 9.0 cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
fedoraproject fedora 15 cpe:2.3:o:fedoraproject:fedora:15:*:*:*:*:*:*:*
fedoraproject fedora 16 cpe:2.3:o:fedoraproject:fedora:16:*:*:*:*:*:*:*
debian debian_linux 5.0 cpe:2.3:o:debian:debian_linux:5.0:*:*:*:*:*:*:*
debian debian_linux 6.0 cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*
debian debian_linux 7.0 cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
opensuse opensuse 11.3 cpe:2.3:o:opensuse:opensuse:11.3:*:*:*:*:*:*:*
opensuse opensuse 11.4 cpe:2.3:o:opensuse:opensuse:11.4:*:*:*:*:*:*:*
suse linux_enterprise_desktop 10 cpe:2.3:o:suse:linux_enterprise_desktop:10:sp4:*:*:-:*:*:*
suse linux_enterprise_desktop 11 cpe:2.3:o:suse:linux_enterprise_desktop:11:sp1:*:*:*:*:*:*
suse linux_enterprise_server 9 cpe:2.3:o:suse:linux_enterprise_server:9:*:*:*:*:*:*:*
suse linux_enterprise_server 10 cpe:2.3:o:suse:linux_enterprise_server:10:sp2:*:*:*:*:*:*
suse linux_enterprise_server 10 cpe:2.3:o:suse:linux_enterprise_server:10:sp3:*:*:ltss:*:*:*
suse linux_enterprise_server 10 cpe:2.3:o:suse:linux_enterprise_server:10:sp4:*:*:-:*:*:*
suse linux_enterprise_server 11 cpe:2.3:o:suse:linux_enterprise_server:11:sp1:*:*:*:-:*:*
suse linux_enterprise_server 11 cpe:2.3:o:suse:linux_enterprise_server:11:sp1:*:*:-:vmware:*:*
suse linux_enterprise_software_development_kit 10 cpe:2.3:o:suse:linux_enterprise_software_development_kit:10:sp4:*:*:*:*:*:*
suse linux_enterprise_software_development_kit 11 cpe:2.3:o:suse:linux_enterprise_software_development_kit:11:sp1:*:*:*:*:*:*

CVE-2011-4862 の参考情報

URL タグ
http://archives.neohapsis.com/archives/bugtraq/2011-12/0172.html Broken Link
http://git.savannah.gnu.org/cgit/inetutils.git/commit/?id=665f1e73cdd9b38e2d2e11b8db9958a315935592 Patch Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071627.html Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071640.html Third Party Advisory
http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006117.html Vendor Advisory
http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006118.html Vendor Advisory
http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006119.html Vendor Advisory
http://lists.freebsd.org/pipermail/freebsd-security/2011-December/006120.html Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00002.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00004.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00005.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00007.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00010.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00011.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00014.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2012-01/msg00015.html Mailing List Third Party Advisory
http://osvdb.org/78020 Broken Link
http://secunia.com/advisories/46239 Third Party Advisory
http://secunia.com/advisories/47341 Third Party Advisory
http://secunia.com/advisories/47348 Third Party Advisory
http://secunia.com/advisories/47357 Third Party Advisory
http://secunia.com/advisories/47359 Third Party Advisory
http://secunia.com/advisories/47373 Third Party Advisory
http://secunia.com/advisories/47374 Third Party Advisory
http://secunia.com/advisories/47397 Third Party Advisory
http://secunia.com/advisories/47399 Third Party Advisory
http://secunia.com/advisories/47441 Third Party Advisory
http://security.freebsd.org/advisories/FreeBSD-SA-11:08.telnetd.asc Mitigation Vendor Advisory
http://security.freebsd.org/patches/SA-11:08/telnetd.patch Patch Vendor Advisory
http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2011-008.txt Patch Vendor Advisory
http://www.debian.org/security/2011/dsa-2372 Third Party Advisory
http://www.debian.org/security/2011/dsa-2373 Third Party Advisory
http://www.debian.org/security/2011/dsa-2375 Third Party Advisory
http://www.exploit-db.com/exploits/18280/ Exploit Third Party Advisory VDB Entry
http://www.mandriva.com/security/advisories?name=MDVSA-2011:195 Third Party Advisory
http://www.redhat.com/support/errata/RHSA-2011-1851.html Third Party Advisory
http://www.redhat.com/support/errata/RHSA-2011-1852.html Third Party Advisory
http://www.redhat.com/support/errata/RHSA-2011-1853.html Third Party Advisory
http://www.redhat.com/support/errata/RHSA-2011-1854.html Third Party Advisory
http://www.securitytracker.com/id?1026460 Third Party Advisory VDB Entry
http://www.securitytracker.com/id?1026463 Third Party Advisory VDB Entry
https://exchange.xforce.ibmcloud.com/vulnerabilities/71970 Third Party Advisory VDB Entry
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