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- From 4f7778ed232a92bde388f38917b94f458a82c78e Mon Sep 17 00:00:00 2001
- From: Chrostoper Ertl <chertl@microsoft.com>
- Date: Thu, 28 Nov 2019 16:51:49 +0000
- Subject: [PATCH 08/11] 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.
- ---
- 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 141f0f4ec8dd..b9af1fd75d40 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;
- --
- 2.27.0
-
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