In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
scsi: libiscsi_tcp: Bound SCSI Response data segment to the connection buffer<\/p>\n
iscsi_tcp_hdr_dissect() receives the data segment of several PDU types
\ninto the fixed-size conn->data buffer, which is allocated for
\nISCSI_DEF_MAX_RECV_SEG_LEN (8192) bytes. For the LOGIN_RSP, TEXT_RSP,
\nREJECT and ASYNC_EVENT opcodes the dissect path already rejects a PDU
\nwhose DataSegmentLength exceeds that buffer.<\/p>\n
The SCSI Command Response (ISCSI_OP_SCSI_CMD_RSP) path also copies its
\ndata segment (sense\/response data) into conn->data via
\niscsi_tcp_data_recv_prep(), but it does so without the same check. The
\nonly upstream bound on in.datalen is conn->max_recv_dlength, the
\ninitiator’s advertised MaxRecvDataSegmentLength, which is commonly
\nnegotiated well above 8192 (open-iscsi defaults to 262144). A target
\nthat returns a SCSI Response with a DataSegmentLength between 8193 and
\nmax_recv_dlength therefore overflows the 8192-byte conn->data buffer.<\/p>\n
Once the same bound applies, ISCSI_OP_SCSI_CMD_RSP is handled exactly
\nlike those responses: bound the data segment, receive it into conn->data
\nwhen present, and otherwise complete the PDU with no data. Fold the
\nopcode into that case group rather than duplicating the check.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
scsi: libiscsi_tcp: Bound SCSI Response data segment to the connection buffer<\/p>\n
iscsi_tcp_hdr_dissect() receives the data segment of<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-7570","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/7570","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7570"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7570"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7570"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}