PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In affected versions if the incoming STUN message contains an ERROR-CODE attribute, the header length is not checked before performing a subtraction operation, potentially resulting in an integer underflow scenario. This issue affects all users that use STUN. A malicious actor located within the victim’s network may forge and send a specially crafted UDP (STUN) message that could remotely execute arbitrary code on the victim’s machine. Users are advised to upgrade as soon as possible. There are no known workarounds.
総合評価: CVE-2021-37706 は高リスク（65/100）。CVSS 深刻度は高。悪用される可能性が高い（EPSS 4.62%、90 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 +4.12% 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 | 0.51% | 4.62% | +4.12% |
| 2 | 2026-05-18 | 0.24% | 0.51% | +0.26% |
| 3 | 2026-04-16 | — | 0.24% | — |
EPSS の全履歴 （全 30 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 |
|---|---|---|---|---|---|---|
| 7.3 | 3.1 | HIGH |
|
3.9 | 3.4 | [email protected] |
| 9.8 | 3.1 | CRITICAL |
|
3.9 | 5.9 | [email protected] |
| 9.3 | 2.0 | HIGH |
|
8.6 | 10.0 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
alpine
|
— | CVE-2021-37706: 1 source package rows (pjproject); 7 state rows across 7 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 7, open 0. | https://security.alpinelinux.org/vuln/CVE-2021-37706 |
debian
|
not yet assigned | CVE-2021-37706 not yet assigned priority: Debian including 2 source packages (asterisk, ring), 4 status rows across 3 suites (bookworm, bullseye, sid): resolved 4. | https://security-tracker.debian.org/tracker/CVE-2021-37706 |
gentoo
|
normal | CVE-2021-37706: 1 GLSA(s) (202210-37), 1 atom(s) (net-libs/pjproject); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2021-37706 |
ubuntu
|
medium | CVE-2021-37706 medium priority: Ubuntu including 2 source packages (pjproject, ring), 16 status rows across 12 suites (bionic, focal, impish, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): released 7, DNE 4, ignored 4, needs-triage 1. | https://ubuntu.com/security/CVE-2021-37706 |
| ベンダー | 製品 | バージョン | 生の CPE |
|---|---|---|---|
| teluu | pjsip | <= 2.11.1 | cpe:2.3:a:teluu:pjsip:*:*:*:*:*:*:*:* |
| asterisk | certified_asterisk | < 16.8.0 | cpe:2.3:a:asterisk:certified_asterisk:*:*:*:*:*:*:*:* |
| asterisk | certified_asterisk | 16.8.0 | cpe:2.3:a:asterisk:certified_asterisk:16.8.0:*:*:*:*:*:*:* |
| asterisk | certified_asterisk | 16.8.0 | cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert1:*:*:*:*:*:* |
| asterisk | certified_asterisk | 16.8.0 | cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert10:*:*:*:*:*:* |
| asterisk | certified_asterisk | 16.8.0 | cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert11:*:*:*:*:*:* |
| asterisk | certified_asterisk | 16.8.0 | cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert12:*:*:*:*:*:* |
| asterisk | certified_asterisk | 16.8.0 | cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert2:*:*:*:*:*:* |
| asterisk | certified_asterisk | 16.8.0 | cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert3:*:*:*:*:*:* |
| asterisk | certified_asterisk | 16.8.0 | cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert4:*:*:*:*:*:* |
| asterisk | certified_asterisk | 16.8.0 | cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert5:*:*:*:*:*:* |
| asterisk | certified_asterisk | 16.8.0 | cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert6:*:*:*:*:*:* |
| asterisk | certified_asterisk | 16.8.0 | cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert7:*:*:*:*:*:* |
| asterisk | certified_asterisk | 16.8.0 | cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert8:*:*:*:*:*:* |
| asterisk | certified_asterisk | 16.8.0 | cpe:2.3:a:asterisk:certified_asterisk:16.8.0:cert9:*:*:*:*:*:* |
| sangoma | asterisk | >= 16.0.0, < 16.24.1 | cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* |
| sangoma | asterisk | >= 18.0.0, < 18.10.1 | cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* |
| sangoma | asterisk | >= 19.0.0, < 19.2.1 | cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:* |
| debian | debian_linux | 9.0 | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* |
| debian | debian_linux | 10.0 | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
| URL | タグ |
|---|---|
| http://packetstormsecurity.com/files/166225/Asterisk-Project-Security-Advisory-AST-2022-004.html | Third Party Advisory VDB Entry |
| http://seclists.org/fulldisclosure/2022/Mar/0 | Mailing List Patch Third Party Advisory |
| https://github.com/pjsip/pjproject/commit/15663e3f37091069b8c98a7fce680dc04bc8e865 | Patch Third Party Advisory |
| https://github.com/pjsip/pjproject/security/advisories/GHSA-2qpg-f6wf-w984 | Patch Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2022/03/msg00035.html | Mailing List Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html | Mailing List Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2023/08/msg00038.html | |
| https://security.gentoo.org/glsa/202210-37 | Third Party Advisory |
| https://www.debian.org/security/2022/dsa-5285 | Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2024/09/msg00030.html |