Heap-based buffer overflow in PolarSSL 1.x before 1.2.17 and ARM mbed TLS (formerly PolarSSL) 1.3.x before 1.3.14 and 2.x before 2.1.2 allows remote SSL servers to cause a denial of service (client crash) and possibly execute arbitrary code via a long hostname to the server name indication (SNI) extension, which is not properly handled when creating a ClientHello message. NOTE: this identifier has been SPLIT per ADT3 due to different affected version ranges. See CVE-2015-8036 for the session ticket issue that was introduced in 1.3.0.
総合評価: CVE-2015-5291 は中リスク（59.6/100）。CVSS 深刻度は中。悪用される可能性が高い（EPSS 3.63%、88 パーセンタイル） 根拠: 直近 1 日で EPSS が +1.58% 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: 影響資産を整理し、修補計画に組み込んでください。
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 | 2.05% | 3.63% | +1.58% |
| 2 | 2026-03-03 | 1.71% | 2.05% | +0.34% |
| 3 | 2025-03-30 | — | 1.71% | — |
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 |
|---|---|---|---|---|---|---|
| 6.8 | 2.0 | MEDIUM |
|
8.6 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2015-5291 unimportant priority: Debian including 1 source packages (mbedtls), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2015-5291 |
gentoo
|
high | CVE-2015-5291: 1 GLSA(s) (201706-18), 1 atom(s) (net-libs/mbedtls); latest impact high. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2015-5291 |
ubuntu
|
medium | CVE-2015-5291 medium priority: Ubuntu including 2 source packages (mbedtls, polarssl), 23 status rows across 12 suites (artful, bionic, cosmic, disco, precise, trusty, upstream, vivid, wily, xenial, yakkety, zesty): DNE 11, not-affected 7, released 3, ignored 2. | https://ubuntu.com/security/CVE-2015-5291 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| polarssl | polarssl | >= 1.0.0, < 1.2.17 | cpe:2.3:a:polarssl:polarssl:*:*:*:*:*:*:*:* |
| trustedfirmware | mbed_tls | >= 1.3.0, < 1.3.14 | cpe:2.3:a:trustedfirmware:mbed_tls:*:*:*:*:*:*:*:* |
| trustedfirmware | mbed_tls | >= 2.0.0, < 2.1.2 | cpe:2.3:a:trustedfirmware:mbed_tls:*:*:*:*:*:*:*:* |
| debian | debian_linux | 7.0 | cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* |
| debian | debian_linux | 8.0 | cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* |
| fedoraproject | fedora | 21 | cpe:2.3:o:fedoraproject:fedora:21:*:*:*:*:*:*:* |
| fedoraproject | fedora | 22 | cpe:2.3:o:fedoraproject:fedora:22:*:*:*:*:*:*:* |
| fedoraproject | fedora | 23 | cpe:2.3:o:fedoraproject:fedora:23:*:*:*:*:*:*:* |
| opensuse | leap | 42.1 | cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:* |
| opensuse | opensuse | 13.2 | cpe:2.3:o:opensuse:opensuse:13.2:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170317.html | Mailing List Third Party Advisory |
| http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169625.html | Mailing List Third Party Advisory |
| http://lists.fedoraproject.org/pipermail/package-announce/2015-October/169765.html | Mailing List Third Party Advisory |
| http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00013.html | Mailing List Third Party Advisory |
| http://lists.opensuse.org/opensuse-updates/2015-12/msg00119.html | Mailing List Third Party Advisory |
| http://www.debian.org/security/2016/dsa-3468 | Third Party Advisory |
| https://guidovranken.files.wordpress.com/2015/10/cve-2015-5291.pdf | Third Party Advisory |
| https://guidovranken.wordpress.com/2015/10/07/cve-2015-5291/ | Third Party Advisory |
| https://security.gentoo.org/glsa/201706-18 | Third Party Advisory |
| https://tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2015-01 | Vendor Advisory |