The irc_msg_who function in msgs.c in the IRC protocol plugin in libpurple 2.8.0 through 2.9.0 in Pidgin before 2.10.0 does not properly validate characters in nicknames, which allows user-assisted remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted nickname that is not properly handled in a WHO response.
結論預警: CVE-2011-2943 綜合評估為中等風險（47.6/100）：CVSS 技術影響為中級，利用機率（EPSS 3.60%） 強制指令: 梳理受影響資產並納入修補計畫。
風險隨態勢動態變化；本站持續評估並同步更新本頁展示內容。
EPSS 日更估計相對被利用可能性；百分位表示該 CVE 在已評分漏洞中的相對排名（越高表示相對更嚴重）。
| # | 日期 | 舊 EPSS 分數 | 新 EPSS 分數 | 變化（新 − 舊） |
|---|---|---|---|---|
| 1 | 2026-06-15 | 3.96% | 3.60% | -0.36% |
| 2 | 2025-03-30 | 8.82% | 3.96% | -4.86% |
| 3 | 2025-03-29 | — | 8.82% | — |
完整 EPSS 歷史 （共 8 筆）
該 CVE 的 CVSS 指標。
| 底座分 | 版本 | 嚴重度 | 向量 | 可利用性 | 影響 | 分數來源 |
|---|---|---|---|---|---|---|
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2011-2943 not yet assigned priority: Debian including 1 source packages (pidgin), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2011-2943 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2011-2943 |
ubuntu
|
low | CVE-2011-2943 low priority: Ubuntu including 1 source packages (pidgin), 6 status rows across 6 suites (hardy, lucid, maverick, natty, oneiric, upstream): not-affected 4, ignored 1, released 1. | https://ubuntu.com/security/CVE-2011-2943 |
: Per: http://cwe.mitre.org/data/definitions/476.html 'CWE-476: NULL Pointer Dereference'
| 廠商 | 產品 | 版本 | 原始 CPE |
|---|---|---|---|
| pidgin | libpurple | 2.8.0 | cpe:2.3:a:pidgin:libpurple:2.8.0:*:*:*:*:*:*:* |
| pidgin | libpurple | 2.9.0 | cpe:2.3:a:pidgin:libpurple:2.9.0:*:*:*:*:*:*:* |
| pidgin | pidgin | <= 2.9.0 | cpe:2.3:a:pidgin:pidgin:*:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.0.0 | cpe:2.3:a:pidgin:pidgin:2.0.0:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.0.1 | cpe:2.3:a:pidgin:pidgin:2.0.1:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.0.2 | cpe:2.3:a:pidgin:pidgin:2.0.2:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.1.0 | cpe:2.3:a:pidgin:pidgin:2.1.0:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.1.1 | cpe:2.3:a:pidgin:pidgin:2.1.1:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.2.0 | cpe:2.3:a:pidgin:pidgin:2.2.0:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.2.1 | cpe:2.3:a:pidgin:pidgin:2.2.1:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.2.2 | cpe:2.3:a:pidgin:pidgin:2.2.2:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.3.0 | cpe:2.3:a:pidgin:pidgin:2.3.0:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.3.1 | cpe:2.3:a:pidgin:pidgin:2.3.1:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.4.0 | cpe:2.3:a:pidgin:pidgin:2.4.0:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.4.1 | cpe:2.3:a:pidgin:pidgin:2.4.1:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.4.2 | cpe:2.3:a:pidgin:pidgin:2.4.2:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.4.3 | cpe:2.3:a:pidgin:pidgin:2.4.3:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.5.0 | cpe:2.3:a:pidgin:pidgin:2.5.0:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.5.1 | cpe:2.3:a:pidgin:pidgin:2.5.1:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.5.2 | cpe:2.3:a:pidgin:pidgin:2.5.2:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.5.3 | cpe:2.3:a:pidgin:pidgin:2.5.3:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.5.4 | cpe:2.3:a:pidgin:pidgin:2.5.4:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.5.5 | cpe:2.3:a:pidgin:pidgin:2.5.5:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.5.6 | cpe:2.3:a:pidgin:pidgin:2.5.6:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.5.7 | cpe:2.3:a:pidgin:pidgin:2.5.7:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.5.8 | cpe:2.3:a:pidgin:pidgin:2.5.8:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.5.9 | cpe:2.3:a:pidgin:pidgin:2.5.9:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.6.0 | cpe:2.3:a:pidgin:pidgin:2.6.0:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.6.1 | cpe:2.3:a:pidgin:pidgin:2.6.1:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.6.2 | cpe:2.3:a:pidgin:pidgin:2.6.2:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.6.4 | cpe:2.3:a:pidgin:pidgin:2.6.4:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.6.5 | cpe:2.3:a:pidgin:pidgin:2.6.5:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.6.6 | cpe:2.3:a:pidgin:pidgin:2.6.6:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.7.0 | cpe:2.3:a:pidgin:pidgin:2.7.0:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.7.1 | cpe:2.3:a:pidgin:pidgin:2.7.1:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.7.2 | cpe:2.3:a:pidgin:pidgin:2.7.2:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.7.3 | cpe:2.3:a:pidgin:pidgin:2.7.3:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.7.4 | cpe:2.3:a:pidgin:pidgin:2.7.4:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.7.5 | cpe:2.3:a:pidgin:pidgin:2.7.5:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.7.6 | cpe:2.3:a:pidgin:pidgin:2.7.6:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.7.7 | cpe:2.3:a:pidgin:pidgin:2.7.7:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.7.8 | cpe:2.3:a:pidgin:pidgin:2.7.8:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.7.9 | cpe:2.3:a:pidgin:pidgin:2.7.9:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.7.10 | cpe:2.3:a:pidgin:pidgin:2.7.10:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.7.11 | cpe:2.3:a:pidgin:pidgin:2.7.11:*:*:*:*:*:*:* |
| pidgin | pidgin | 2.8.0 | cpe:2.3:a:pidgin:pidgin:2.8.0:*:*:*:*:*:*:* |