| タイトル | Memcached 1.6.41 > 1.6.43 Out-of-Bounds Read |
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| 説明 | A pre-authentication remote denial-of-service vulnerability affects memcached 1.6.41 through 1.6.43 when started with ASCII authentication (-Y <authfile>). An unauthenticated client can trigger a crash by sending three newline bytes (\n\n\n) immediately after connecting. The authentication path forwards an empty line to the vendored mcmc tokenizer without validating that the token length is non-zero. Because _mcmc_tokenize_meta() assumes an input length of at least two bytes, it performs out-of-bounds pointer arithmetic and enters an unbounded scan that ultimately dereferences unmapped memory, causing the memcached process to terminate with SIGSEGV. |
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| ソース | ⚠️ https://protectiv.ph/research/memcached-asciiauth-empty-line-dos |
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| ユーザー | Ebfe7001d27b27064356271ddfb15d59 (UID 100393) |
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| 送信 | 2026年08月05日 16:06 (2 月 ago) |
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| モデレーション | 2026年09月13日 07:24 (1 month later) |
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| ステータス | 重複 |
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| VulDBエントリ | 403231 [memcached 1.6.41/1.6.42/1.6.43 mcmc Tokenizer proto_text.c try_read_command_asciiauth 情報漏えい] |
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| ポイント | 0 |
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