From b724ee7726a6f36989e81e7886204d69458120a2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miloslav=20Trma=C4=8D?= <mitr@redhat.com>
Date: Thu, 18 Apr 2024 19:10:39 +0200
Subject: [PATCH] Validate the tags returned by a registry
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Signed-off-by: Miloslav Trmač <mitr@redhat.com>
---
 docker/docker_image.go | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/docker/docker_image.go b/docker/docker_image.go
index 93160480ea..4c80bb2b52 100644
--- a/docker/docker_image.go
+++ b/docker/docker_image.go
@@ -88,7 +88,12 @@ func GetRepositoryTags(ctx context.Context, sys *types.SystemContext, ref types.
 		if err = json.NewDecoder(res.Body).Decode(&tagsHolder); err != nil {
 			return nil, err
 		}
-		tags = append(tags, tagsHolder.Tags...)
+		for _, tag := range tagsHolder.Tags {
+			if _, err := reference.WithTag(dr.ref, tag); err != nil { // Ensure the tag does not contain unexpected values
+				return nil, fmt.Errorf("registry returned invalid tag %q: %w", tag, err)
+			}
+			tags = append(tags, tag)
+		}
 
 		link := res.Header.Get("Link")
 		if link == "" {