kumquat-buildroot/package/ipmitool/0010-session-Fix-buffer-overflow-in-ipmi_get_session_info.patch

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From cd785a7fe4f42ab59bcefcf01b9175f039af29b5 Mon Sep 17 00:00:00 2001
From: Chrostoper Ertl <chertl@microsoft.com>
Date: Thu, 28 Nov 2019 16:51:49 +0000
Subject: [PATCH] session: Fix buffer overflow in ipmi_get_session_info
Partial fix for CVE-2020-5208, see
https://github.com/ipmitool/ipmitool/security/advisories/GHSA-g659-9qxw-p7cp
The `ipmi_get_session_info` function does not properly check the
response `data_len`, which is used as a copy size, allowing stack buffer
overflow.
[Retrieve from:
https://github.com/ipmitool/ipmitool/commit/41d7026946fafbd4d1ec0bcaca3ea30a6e8eed22]
Signed-off-by: Heiko Thiery <heiko.thiery@gmail.com>
---
lib/ipmi_session.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/lib/ipmi_session.c b/lib/ipmi_session.c
index 141f0f4..b9af1fd 100644
--- a/lib/ipmi_session.c
+++ b/lib/ipmi_session.c
@@ -309,8 +309,10 @@ ipmi_get_session_info(struct ipmi_intf * intf,
}
else
{
- memcpy(&session_info, rsp->data, rsp->data_len);
- print_session_info(&session_info, rsp->data_len);
+ memcpy(&session_info, rsp->data,
+ __min(rsp->data_len, sizeof(session_info)));
+ print_session_info(&session_info,
+ __min(rsp->data_len, sizeof(session_info)));
}
break;
@@ -341,8 +343,10 @@ ipmi_get_session_info(struct ipmi_intf * intf,
break;
}
- memcpy(&session_info, rsp->data, rsp->data_len);
- print_session_info(&session_info, rsp->data_len);
+ memcpy(&session_info, rsp->data,
+ __min(rsp->data_len, sizeof(session_info)));
+ print_session_info(&session_info,
+ __min(rsp->data_len, sizeof(session_info)));
} while (i <= session_info.session_slot_count);
break;
--
2.20.1