CVE-2026-21908 (CNNVD-202601-2538)

HIGH
中文标题:
Juniper Networks Junos OS和Juniper Networks Junos OS Evolved 资源管理错误漏洞
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: 资源管理错误
状态: PUBLISHED
数据质量分数: 0.40
数据版本: v4
漏洞描述
中文描述:

Juniper Networks Junos OS和Juniper Networks Junos OS Evolved都是美国瞻博网络（Juniper Networks）公司的产品。Juniper Networks Junos OS是一套专用于该公司的硬件设备的网络操作系统。该操作系统提供了安全编程接口和Junos SDK。Juniper Networks Junos OS Evolved是Junos OS 的升级版系统。 Juniper Networks Junos OS和Juniper Networks Junos OS Evolved存在资源管理错误漏洞，该漏洞源于802.1X身份验证守护进程存在释放后重用，可能导致拒绝服务或执行任意代码。以下版本受到影响：Juniper Networks Junos OS 23.2R2-S5之前版本、23.4R2-S6之前版本、24.2R2-S3之前版本、24.4R2-S1之前版本、25.2R1-S2和25.2R2之前版本和Junos OS Evolved 23.2R2-S5-EVO之前版本、23.4R2-S6-EVO之前版本、24.2R2-S3-EVO之前版本、24.4R2-S1-EVO之前版本、25.2R1-S2-EVO和25.2R2-EVO之前版本。

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:*:*:*:*:*:*:*:*
juniper junos 23.2 - - cpe:2.3:o:juniper:junos:23.2:r2-s1:*:*:*:*:*:*
juniper junos 23.4 - - cpe:2.3:o:juniper:junos:23.4:r2:*:*:*:*:*:*
juniper junos 24.2 - - cpe:2.3:o:juniper:junos:24.2:-:*:*:*:*:*:*
juniper junos 24.4 - - cpe:2.3:o:juniper:junos:24.4:-:*:*:*:*:*:*
juniper junos 25.2 - - cpe:2.3:o:juniper:junos:25.2:-:*:*:*:*:*:*
juniper junos_os_evolved 23.2 - - cpe:2.3:o:juniper:junos_os_evolved:23.2:r2-s1:*:*:*:*:*:*
juniper junos_os_evolved 23.4 - - cpe:2.3:o:juniper:junos_os_evolved:23.4:r2:*:*:*:*:*:*
juniper junos_os_evolved 24.2 - - cpe:2.3:o:juniper:junos_os_evolved:24.2:-:*:*:*:*:*:*
juniper junos_os_evolved 24.4 - - cpe:2.3:o:juniper:junos_os_evolved:24.4:-:*:*:*:*:*:*
juniper junos_os_evolved 25.2 - - cpe:2.3:o:juniper:junos_os_evolved:25.2:-:*:*:*:*:*:*
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:
2026-01-26 02:11:46
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
CNNVD cnnvd_CNNVD-202601-2538 2026-01-19 09:28:44 2026-01-19 09:29:39
版本与语言
当前版本: v4
主要语言: EN
支持语言:
EN ZH
安全公告
暂无安全公告信息
变更历史
v4 NVD
2026-01-24 06:00:19
affected_products_count: 2 → 12
查看详细变更
  • affected_products_count: 2 -> 12
v3 CNNVD
2026-01-19 09:29:39
vulnerability_type: 未提取 → 资源管理错误; cnnvd_id: 未提取 → CNNVD-202601-2538; data_sources: ['cve', 'nvd'] → ['cnnvd', 'cve', 'nvd']
查看详细变更
  • vulnerability_type: 未提取 -> 资源管理错误
  • cnnvd_id: 未提取 -> CNNVD-202601-2538
  • data_sources: ['cve', 'nvd'] -> ['cnnvd', 'cve', 'nvd']
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']