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[8.19](backport #44026) Fix EvtVarTypeAnsiString conversion in winlogbeat #45230

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Merged
marc-gr merged 1 commit into from
Jul 8, 2025
Merged

[8.19](backport #44026) Fix EvtVarTypeAnsiString conversion in winlogbeat #45230

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1 change: 1 addition & 0 deletions CHANGELOG.next.asciidoc
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Original file line number Diff line number Diff line change
Expand Up @@ -292,6 +292,7 @@ otherwise no tag is added. {issue}42208[42208] {pull}42403[42403]
- Reset EventLog if error EOF is encountered. {pull}42826[42826]
- Implement backoff on error retrial. {pull}42826[42826]
- Fix boolean key in security pipelines and sync pipelines with integration. {pull}43027[43027]
- Fix EvtVarTypeAnsiString conversion {pull}44026[44026]


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5 changes: 4 additions & 1 deletion winlogbeat/sys/strings_windows.go
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Expand Up @@ -18,6 +18,7 @@
package sys

import (
"bytes"
"sync"

"golang.org/x/sys/windows"
Expand Down Expand Up @@ -48,6 +49,8 @@ func initANSIDecoder() *encoding.Decoder {
}

func ANSIBytesToString(enc []byte) (string, error) {
out, err := getCachedANSIDecoder().Bytes(enc)
// Trim to the null terminator
prefix, _, _ := bytes.Cut(enc, []byte("\x00"))
out, err := getCachedANSIDecoder().Bytes(prefix)
return string(out), err
}