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[Filebeat] syslog date allowing 0 in day #18064

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[Filebeat] syslog date allowing 0 in day #18064

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1 change: 1 addition & 0 deletions CHANGELOG.asciidoc
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Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@ https://github.com/elastic/beats/compare/v7.5.0...v7.5.1[View commits]
- Change iis url path grok pattern from URIPATH to NOTSPACE. {issue}12710[12710] {pull}13225[13225] {issue}7951[7951] {pull}13378[13378] {pull}14754[14754]
- Fix azure filesets test files. {issue}14185[14185] {pull}14235[14235]
- Update Logstash module's Grok patterns to support Logstash 7.4 logs. {pull}14743[14743]
- Allow for leading 0 in syslog day format as per {issue}16824[16824]

*Metricbeat*

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4 changes: 3 additions & 1 deletion filebeat/input/syslog/syslog_rfc3164.rl
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Expand Up @@ -19,7 +19,9 @@
# Match: " 5" and "10" as the day
multiple_digits_day = (([12][0-9]) | ("3"[01]))>tok %day;
single_digit_day = [1-9]>tok %day;
day = (space? single_digit_day | multiple_digits_day);
# Support 'Aug 07' format for misinterpretations of rfc
supported_multiple_digits_day = [0][0-9]>tok %day;
day = (space? single_digit_day | multiple_digits_day | supported_multiple_digits_day);

# Match: hh:mm:ss (24 hr format)
hour = ([01][0-9]|"2"[0-3])>tok %hour;
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