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From: a804c04ddc8245fc8adf0e92368709639125e183 Mon Sep 17 00:00:00 2001
From: Brad House <brad@brad-house.com>
Date: Mon, 11 Mar 2024 14:29:39 +0000
Subject: [PATCH] Merge pull request from GHSA-mg26-v6qh-x48q
CVE: CVE-2024-25629
Upstream-Status: Backport [https://github.com/c-ares/c-ares/commit/a804c04ddc8245fc8adf0e92368709639125e183]
Signed-off-by: Yogita Urade <yogita.urade@windriver.com>
---
src/lib/ares__read_line.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/src/lib/ares__read_line.c b/src/lib/ares__read_line.c
index c62ad2a..d6625a3 100644
--- a/src/lib/ares__read_line.c
+++ b/src/lib/ares__read_line.c
@@ -49,6 +49,14 @@ int ares__read_line(FILE *fp, char **buf, size_t *bufsize)
if (!fgets(*buf + offset, bytestoread, fp))
return (offset != 0) ? 0 : (ferror(fp)) ? ARES_EFILE : ARES_EOF;
len = offset + strlen(*buf + offset);
+
+ /* Probably means there was an embedded NULL as the first character in
+ * the line, throw away line */
+ if (len == 0) {
+ offset = 0;
+ continue;
+ }
+
if ((*buf)[len - 1] == '\n')
{
(*buf)[len - 1] = 0;
--
2.40.0
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