Skip to content

in_collectd: reject parts with length < 4 and fix null-terminator OOB #11849

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
edsiper merged 1 commit into from
Jun 2, 2026
+8 −7
Merged

in_collectd: reject parts with length < 4 and fix null-terminator OOB #11849

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
15 changes: 8 additions & 7 deletions plugins/in_collectd/netprot.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -247,8 +247,9 @@ int netprot_to_msgpack(char *buf, int len, struct mk_list *tdb,
part_type = be16read(buf);
part_len = be16read((unsigned char *) buf + 2);

if (len < part_len) {
flb_error("[in_collectd] data truncated (%i < %i)", len, part_len);
if (part_len < 4 || len < part_len) {
flb_error("[in_collectd] invalid part length (%i, remaining %i)",
part_len, len);
return -1;
}

Expand All @@ -268,7 +269,7 @@ int netprot_to_msgpack(char *buf, int len, struct mk_list *tdb,

switch (part_type) {
case PART_HOST:
if (ptr[size] == '\0') {
if (size > 0 && ptr[size - 1] == '\0') {
hdr.host = ptr;
}
break;
Expand All @@ -279,22 +280,22 @@ int netprot_to_msgpack(char *buf, int len, struct mk_list *tdb,
hdr.time = hr2time(be64read(ptr));
break;
case PART_PLUGIN:
if (ptr[size] == '\0') {
if (size > 0 && ptr[size - 1] == '\0') {
hdr.plugin = ptr;
}
break;
case PART_PLUGIN_INSTANCE:
if (ptr[size] == '\0') {
if (size > 0 && ptr[size - 1] == '\0') {
hdr.plugin_instance = ptr;
}
break;
case PART_TYPE:
if (ptr[size] == '\0') {
if (size > 0 && ptr[size - 1] == '\0') {
hdr.type = ptr;
}
break;
case PART_TYPE_INSTANCE:
if (ptr[size] == '\0') {
if (size > 0 && ptr[size - 1] == '\0') {
hdr.type_instance = ptr;
}
break;
Expand Down
Loading