Description · from the CVE record
In the Linux kernel, the following vulnerability has been resolved:
scsi: libiscsi: Reject a negative task index from parse_pdu_itt
A transport that implements parse_pdu_itt hands libiscsi an index taken
from the PDU, and both lookups bound it from above only:
if (i >= session->cmds_max)
i and cmds_max are both int, so a negative index passes and
session->cmds[i] is read from before the array.
be2iscsi produces one. beiscsi_parse_pdu() assigns the raw tag,
*index = (int)itt;
and beiscsi_complete_pdu() forwards an unsolicited NOP-In from the
hardware async ring without replacing its ITT, so the value is the
target's. It also reports the session's own age rather than the one in
the tag, which leaves the age comparison in iscsi_verify_itt() with
nothing to reject.
Bound the index from below in both lookups.
Affected
ProductAffectedFixed inSource
Linuxbfead3b2cb4607c71831423c3ee97d22cd0c9dcb – < 24bd9ba431b2daa263f3551bc2f09f6b4487f5ae24bd9ba431b2daa263f3551bc2f09f6b4487f5aeCNA
Linuxbfead3b2cb4607c71831423c3ee97d22cd0c9dcb – < f8fabe1fe044f86abc42194b8f86dfd70212115ff8fabe1fe044f86abc42194b8f86dfd70212115fCNA
Linuxbfead3b2cb4607c71831423c3ee97d22cd0c9dcb – < e896a97f336c5edfc13066b57ed431cb3f64e68ce896a97f336c5edfc13066b57ed431cb3f64e68cCNA
Linuxbfead3b2cb4607c71831423c3ee97d22cd0c9dcb – < 6200fb2de579f268742a77b0f3d823cb0a8b19476200fb2de579f268742a77b0f3d823cb0a8b1947CNA
Linuxbfead3b2cb4607c71831423c3ee97d22cd0c9dcb – < 0eb06ebbbecb122f0df9a1f7f623f5255be741ed0eb06ebbbecb122f0df9a1f7f623f5255be741edCNA
Linuxbfead3b2cb4607c71831423c3ee97d22cd0c9dcb – < 6cadfa6f1f5896632d4223d3b7addb2a29fea74e6cadfa6f1f5896632d4223d3b7addb2a29fea74eCNA
Linuxbfead3b2cb4607c71831423c3ee97d22cd0c9dcb – < 35b60549a956237488c89a2d85352e026e7d55b735b60549a956237488c89a2d85352e026e7d55b7CNA
Linuxbfead3b2cb4607c71831423c3ee97d22cd0c9dcb – < 8ee2a09a1dbb257c9e828ad2497f8e4832dfb1428ee2a09a1dbb257c9e828ad2497f8e4832dfb142CNA
Linux2.6.33–CNA
by Kastro