54 lines
1.9 KiB
Diff
54 lines
1.9 KiB
Diff
From 478dfe51552243b367cf2e9c5d047cbbd3c21635 Mon Sep 17 00:00:00 2001
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From: Randy Barlow <randy@electronsweatshop.com>
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Date: Fri, 18 Mar 2022 12:42:57 -0400
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Subject: [PATCH] CVE-2022-48468: unsigned integer overflow
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This commit combines two upstream commits from protobuf-c[0][1].
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The first fixes an unsigned integer overflow, and the second fixes a
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regression introduced by the first. I originally decided to amend the
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commit message of the first to mention that it fixes a CVE, but then I
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realized it would be better to bring the fix for the regression together
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with it.
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https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-48468
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https://bugzilla.redhat.com/show_bug.cgi?id=2186673
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[0]
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https://github.com/protobuf-c/protobuf-c/pull/513/commits/289f5c18b195aa43d46a619d1188709abbfa9c82
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[1]
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https://github.com/protobuf-c/protobuf-c/pull/513/commits/0d1fd124a4e0a07b524989f6e64410ff648fba61
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Co-authored-by: 10054172 <hui.zhang@thalesgroup.com>
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Co-authored-by: "Todd C. Miller" <Todd.Miller@sudo.ws>
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Signed-off-by: 10054172 <hui.zhang@thalesgroup.com>
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Signed-off-by: Randy Barlow <randy@electronsweatshop.com>
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---
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src/protobuf-c/protobuf-c.c | 11 +++++++----
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1 file changed, 7 insertions(+), 4 deletions(-)
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diff --git a/src/protobuf-c/protobuf-c.c b/src/protobuf-c/protobuf-c.c
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index 4f2f5bc..6ae5287 100644
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--- a/src/protobuf-c/protobuf-c.c
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+++ b/src/protobuf-c/protobuf-c.c
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@@ -2456,10 +2456,13 @@ parse_required_member(ScannedMember *scanned_member,
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return FALSE;
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def_mess = scanned_member->field->default_value;
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- subm = protobuf_c_message_unpack(scanned_member->field->descriptor,
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- allocator,
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- len - pref_len,
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- data + pref_len);
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+ if (len >= pref_len)
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+ subm = protobuf_c_message_unpack(scanned_member->field->descriptor,
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+ allocator,
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+ len - pref_len,
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+ data + pref_len);
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+ else
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+ subm = NULL;
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if (maybe_clear &&
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*pmessage != NULL &&
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--
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2.39.2
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