diff options
Diffstat (limited to 'meta-oe/recipes-kernel/ipmitool/ipmitool/0001-fru-Fix-buffer-overflow-vulnerabilities.patch')
-rw-r--r-- | meta-oe/recipes-kernel/ipmitool/ipmitool/0001-fru-Fix-buffer-overflow-vulnerabilities.patch | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/meta-oe/recipes-kernel/ipmitool/ipmitool/0001-fru-Fix-buffer-overflow-vulnerabilities.patch b/meta-oe/recipes-kernel/ipmitool/ipmitool/0001-fru-Fix-buffer-overflow-vulnerabilities.patch new file mode 100644 index 0000000000..aeb0da80e4 --- /dev/null +++ b/meta-oe/recipes-kernel/ipmitool/ipmitool/0001-fru-Fix-buffer-overflow-vulnerabilities.patch @@ -0,0 +1,133 @@ +From 2542bade29c192370ca897eab67c40f27b8912f8 Mon Sep 17 00:00:00 2001 +From: Chrostoper Ertl <chertl@microsoft.com> +Date: Wed, 12 Feb 2020 12:32:00 +0800 +Subject: [PATCH 1/6] fru: Fix buffer overflow vulnerabilities + +Partial fix for CVE-2020-5208, see +https://github.com/ipmitool/ipmitool/security/advisories/GHSA-g659-9qxw-p7cp + +The `read_fru_area_section` function only performs size validation of +requested read size, and falsely assumes that the IPMI message will not +respond with more than the requested amount of data; it uses the +unvalidated response size to copy into `frubuf`. If the response is +larger than the request, this can result in overflowing the buffer. + +The same issue affects the `read_fru_area` function. + +Upstream-Status: Backport[https://github.com/ipmitool/ipmitool/commit/e824c23316ae50beb7f7488f2055ac65e8b341f2] +CVE: CVE-2020-5208 + +Signed-off-by: Wenlin Kang <wenlin.kang@windriver.com> +--- + lib/ipmi_fru.c | 33 +++++++++++++++++++++++++++++++-- + 1 file changed, 31 insertions(+), 2 deletions(-) + +diff --git a/lib/ipmi_fru.c b/lib/ipmi_fru.c +index cf00eff..af99aa9 100644 +--- a/lib/ipmi_fru.c ++++ b/lib/ipmi_fru.c +@@ -615,7 +615,10 @@ int + read_fru_area(struct ipmi_intf * intf, struct fru_info *fru, uint8_t id, + uint32_t offset, uint32_t length, uint8_t *frubuf) + { +- uint32_t off = offset, tmp, finish; ++ uint32_t off = offset; ++ uint32_t tmp; ++ uint32_t finish; ++ uint32_t size_left_in_buffer; + struct ipmi_rs * rsp; + struct ipmi_rq req; + uint8_t msg_data[4]; +@@ -628,10 +631,12 @@ read_fru_area(struct ipmi_intf * intf, struct fru_info *fru, uint8_t id, + + finish = offset + length; + if (finish > fru->size) { ++ memset(frubuf + fru->size, 0, length - fru->size); + finish = fru->size; + lprintf(LOG_NOTICE, "Read FRU Area length %d too large, " + "Adjusting to %d", + offset + length, finish - offset); ++ length = finish - offset; + } + + memset(&req, 0, sizeof(req)); +@@ -667,6 +672,7 @@ read_fru_area(struct ipmi_intf * intf, struct fru_info *fru, uint8_t id, + } + } + ++ size_left_in_buffer = length; + do { + tmp = fru->access ? off >> 1 : off; + msg_data[0] = id; +@@ -707,9 +713,18 @@ read_fru_area(struct ipmi_intf * intf, struct fru_info *fru, uint8_t id, + } + + tmp = fru->access ? rsp->data[0] << 1 : rsp->data[0]; ++ if(rsp->data_len < 1 ++ || tmp > rsp->data_len - 1 ++ || tmp > size_left_in_buffer) ++ { ++ printf(" Not enough buffer size"); ++ return -1; ++ } ++ + memcpy(frubuf, rsp->data + 1, tmp); + off += tmp; + frubuf += tmp; ++ size_left_in_buffer -= tmp; + /* sometimes the size returned in the Info command + * is too large. return 0 so higher level function + * still attempts to parse what was returned */ +@@ -742,7 +757,9 @@ read_fru_area_section(struct ipmi_intf * intf, struct fru_info *fru, uint8_t id, + uint32_t offset, uint32_t length, uint8_t *frubuf) + { + static uint32_t fru_data_rqst_size = 20; +- uint32_t off = offset, tmp, finish; ++ uint32_t off = offset; ++ uint32_t tmp, finish; ++ uint32_t size_left_in_buffer; + struct ipmi_rs * rsp; + struct ipmi_rq req; + uint8_t msg_data[4]; +@@ -755,10 +772,12 @@ read_fru_area_section(struct ipmi_intf * intf, struct fru_info *fru, uint8_t id, + + finish = offset + length; + if (finish > fru->size) { ++ memset(frubuf + fru->size, 0, length - fru->size); + finish = fru->size; + lprintf(LOG_NOTICE, "Read FRU Area length %d too large, " + "Adjusting to %d", + offset + length, finish - offset); ++ length = finish - offset; + } + + memset(&req, 0, sizeof(req)); +@@ -773,6 +792,8 @@ read_fru_area_section(struct ipmi_intf * intf, struct fru_info *fru, uint8_t id, + if (fru->access && fru_data_rqst_size > 16) + #endif + fru_data_rqst_size = 16; ++ ++ size_left_in_buffer = length; + do { + tmp = fru->access ? off >> 1 : off; + msg_data[0] = id; +@@ -804,8 +825,16 @@ read_fru_area_section(struct ipmi_intf * intf, struct fru_info *fru, uint8_t id, + } + + tmp = fru->access ? rsp->data[0] << 1 : rsp->data[0]; ++ if(rsp->data_len < 1 ++ || tmp > rsp->data_len - 1 ++ || tmp > size_left_in_buffer) ++ { ++ printf(" Not enough buffer size"); ++ return -1; ++ } + memcpy((frubuf + off)-offset, rsp->data + 1, tmp); + off += tmp; ++ size_left_in_buffer -= tmp; + + /* sometimes the size returned in the Info command + * is too large. return 0 so higher level function +-- +2.23.0 + |