CVE-2026-21908

HIGH
中文标题:
（暂无数据）
英文标题:
Junos OS and Junos OS Evolved: Use after free vulnerability In 802.1X authentication daemon can cause crash of the dot1xd process
CVSS分数: 7.5
发布时间: 2026-01-15 20:21:41
漏洞类型: （暂无数据）
状态: PUBLISHED
数据质量分数: 0.30
数据版本: v2
漏洞描述
中文描述:

（暂无数据）

英文描述:

A Use After Free vulnerability was identified in the 802.1X authentication daemon (dot1xd) of Juniper Networks Junos OS and Junos OS Evolved that could allow an authenticated, network-adjacent attacker flapping a port to crash the dot1xd process, leading to a Denial of Service (DoS), or potentially execute arbitrary code within the context of the process running as root. The issue is specific to the processing of a change in authorization (CoA) when a port bounce occurs. A pointer is freed but was then referenced later in the same code path. Successful exploitation is outside the attacker's direct control due to the specific timing of the two events required to execute the vulnerable code path. This issue affects systems with 802.1X authentication port-based network access control (PNAC) enabled. This issue affects: Junos OS:  * from 23.2R2-S1 before 23.2R2-S5,  * from 23.4R2 before 23.4R2-S6,  * from 24.2 before 24.2R2-S3,  * from 24.4 before 24.4R2-S1,  * from 25.2 before 25.2R1-S2, 25.2R2;  Junos OS Evolved:  * from 23.2R2-S1 before 23.2R2-S5-EVO,  * from 23.4R2 before 23.4R2-S6-EVO,  * from 24.2 before 24.2R2-S3-EVO,  * from 24.4 before 24.4R2-S1-EVO,  * from 25.2 before 25.2R1-S2-EVO, 25.2R2-EVO.

CWE类型:
CWE-416
标签:
（暂无数据）
受影响产品
厂商 产品 版本 版本范围 平台 CPE
Juniper Networks Junos OS - < 23.2R2-S5 - cpe:2.3:a:juniper_networks:junos_os:*:*:*:*:*:*:*:*
Juniper Networks Junos OS Evolved - < 23.2R2-S5-EVO - cpe:2.3:a:juniper_networks:junos_os_evolved:*:*:*:*:*:*:*:*
解决方案
中文解决方案:
（暂无数据）
英文解决方案:
（暂无数据）
临时解决方案:
（暂无数据）
参考链接
无标题 vendor-advisory
cve.org
访问
无标题 vendor-advisory
cve.org
访问
CVSS评分详情
3.1 (cna)
HIGH
7.1
CVSS向量: CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
机密性
HIGH
完整性
HIGH
可用性
HIGH
4.0 (cna)
HIGH
7.5
CVSS向量: CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:L/RE:M/U:Green
机密性
HIGH
完整性
HIGH
可用性
HIGH
后续系统影响 (Subsequent):
机密性
NONE
完整性
NONE
可用性
LOW
时间信息
发布时间:
2026-01-15 20:21:41
修改时间:
2026-01-15 20:45:07
创建时间:
2026-01-16 02:44:26
更新时间:
2026-01-16 02:48:09
利用信息
暂无可利用代码信息
数据源详情
数据源 记录ID 版本 提取时间
CVE cve_CVE-2026-21908 2026-01-16 02:21:11 2026-01-16 02:44:26
NVD nvd_CVE-2026-21908 2026-01-16 02:47:34 2026-01-16 02:48:09
版本与语言
当前版本: v2
主要语言: EN
支持语言:
EN
安全公告
暂无安全公告信息
变更历史
v2 NVD
2026-01-16 02:48:09
affected_products_count: 10 → 2; data_sources: ['cve'] → ['cve', 'nvd']
查看详细变更
  • affected_products_count: 10 -> 2
  • data_sources: ['cve'] -> ['cve', 'nvd']