CVE-2021-4456
中文标题:
（暂无数据）
英文标题:
Net::CIDR versions before 0.24 for Perl mishandle leading zeros in IP CIDR addresses, which may have unspecified impact
漏洞描述
中文描述:
（暂无数据）
英文描述:
Net::CIDR versions before 0.24 for Perl mishandle leading zeros in IP CIDR addresses, which may have unspecified impact. The functions `addr2cidr` and `cidrlookup` may return leading zeros in a CIDR string, which may in turn be parsed as octal numbers by subsequent users. In some cases an attacker may be able to leverage this to bypass access controls based on IP addresses. The documentation advises validating untrusted CIDR strings with the `cidrvalidate` function. However, this mitigation is optional and not enforced by default. In practice, users may call `addr2cidr` or `cidrlookup` with untrusted input and without validation, incorrectly assuming that this is safe.
CWE类型:
标签:
受影响产品
| 厂商 | 产品 | 版本 | 版本范围 | 平台 | CPE |
|---|---|---|---|---|---|
| MRSAM | Net::CIDR | - | < 0.24 | - |
cpe:2.3:a:mrsam:net::cidr:*:*:*:*:*:*:*:*
|
| mrsam | net\ | \ | - | - |
cpe:2.3:a:mrsam:net\:\:cidr:*:*:*:*:*:perl:*:*
|
解决方案
中文解决方案:
英文解决方案:
临时解决方案:
CVSS评分详情
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
时间信息
利用信息
数据源详情
| 数据源 | 记录ID | 版本 | 提取时间 |
|---|---|---|---|
| CVE | cve_CVE-2021-4456 |
2026-02-27 03:18:44 | 2026-02-26 22:00:00 |
| NVD | nvd_CVE-2021-4456 |
2026-02-28 02:00:05 | 2026-02-27 22:00:01 |
版本与语言
安全公告
变更历史
查看详细变更
- affected_products_count: 1 -> 2
查看详细变更
- cvss_score: 未提取 -> 6.5
- cvss_vector: NOT_EXTRACTED -> CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- cvss_version: NOT_EXTRACTED -> 3.1
- data_sources: ['cve'] -> ['cve', 'nvd']