CVE-2026-68768— Hashcat 7.1.2 堆缓冲区溢出漏洞
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一、 漏洞 CVE-2026-68768 基础信息
漏洞信息
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Vulnerability Title
hashcat through 7.1.2 Heap Buffer Overflow in outfile_write() via Oversized Username
来源: CVE Program / CVE List V5
Vulnerability Description
hashcat contains a heap-based buffer overflow (out-of-bounds write) in the outfile_write() function in src/outfile.c. When assembling output into a fixed-size buffer (HCBUFSIZ_LARGE, ~16 MB), the function sequentially appends the username, separator, hash, and plaintext via memcpy without validating that the accumulated length stays within the buffer capacity. When run with --username --show against a crafted hash file containing an oversized username that nearly fills the buffer, the total assembled output exceeds the buffer, causing a heap buffer overflow that can corrupt memory and crash the process.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-68768 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-68768 补丁与修复 (1)
CVE-2026-68768 厂商安全公告 (1)
CVE-2026-68768 概念验证 (1)
CVE-2026-68768 其他参考 (1)
同批安全公告 · hashcat · 2026-08-22 · 共 3 条
| CVE-2026-68766 | 7.8 HIGH | hashcat 7.1.2 恢复文件选项注入导致任意文件写入漏洞 |
| CVE-2026-68767 | 6.1 MEDIUM | hashcat 7.1.2 fgetl()堆溢出漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-68768
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