42 lines
1.3 KiB
Diff
42 lines
1.3 KiB
Diff
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From 71c37c29defeab2c98ad4291807efe12427a209f Mon Sep 17 00:00:00 2001
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From: Nobuyoshi Nakada <nobu@ruby-lang.org>
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Date: Tue, 29 Nov 2022 16:22:15 +0900
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Subject: [PATCH] Fix CVE-2023-28756 ReDoS vulnerability in Time.
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Backported from: Ruby 2.7.8
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Backported from the following commits:
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https://github.com/ruby/ruby/commit/2cb830602f52e7e76c6781115e7938b21f881c4f
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https://github.com/ruby/ruby/commit/e3f18f7d2e034f20053d7bf2fc7a50f8b7e1a27a
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Do not include the test case, as assert_linear_time was introduced in Ruby 2.7.
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==== Original commit message(s)
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Fix quadratic backtracking on invalid time
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Make RFC2822 regexp linear
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https://hackerone.com/reports/1485501
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---
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lib/time.rb | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/lib/time.rb b/lib/time.rb
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index eb46a03..cb6f1e4 100644
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--- a/lib/time.rb
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+++ b/lib/time.rb
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@@ -474,8 +474,8 @@ class Time
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(Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec)\s+
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(\d{2,})\s+
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(\d{2})\s*
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- :\s*(\d{2})\s*
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- (?::\s*(\d{2}))?\s+
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+ :\s*(\d{2})
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+ (?:\s*:\s*(\d\d))?\s+
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([+-]\d{4}|
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UT|GMT|EST|EDT|CST|CDT|MST|MDT|PST|PDT|[A-IK-Z])/ix =~ date
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# Since RFC 2822 permit comments, the regexp has no right anchor.
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--
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2.41.0
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