CVE-2018-6797: A crafted regular expression can cause a heap buffer write overflow in Perl 5 giving a remote attacker control over bytes written
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原文摘录
摘自原文（2899 字符中的一小部分）
An attacker supplies a regular expression containing one or more `\xDF` characters after an escape putting the regexp into unicode matching mode, such as a `\N{}` escape. Each `\xDF` character adds one byte of overflow, and any other text in the regular expression is written in order, providing the …原文中的代码
==28186==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60700000ac58 at pc 0x000000846c2d bp 0x7ffe716bc7f0 sp 0x7ffe716bc7e0
WRITE of size 1 at 0x60700000ac58 thread T0
#0 0x846c2c in S_regatom /root/perl/regcomp.c:13652
#1 0x8587f6 in S_regpiece /root/perl/regcomp.c:11708 …默认不展示报告全文。以上为简短摘录，完整复现过程请阅读原文。版权归研究员与 Internet Bug Bounty 所有。
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阅读 HackerOne 原文 ↗作者 @geeknik · 版权归作者与 Internet Bug Bounty 所有