diff options
Diffstat (limited to 'patches/source/xorg-server-xwayland/0003-6907b6ea2b4ce949cb07271f5b678d5966d9df42.patch')
| -rw-r--r-- | patches/source/xorg-server-xwayland/0003-6907b6ea2b4ce949cb07271f5b678d5966d9df42.patch | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/patches/source/xorg-server-xwayland/0003-6907b6ea2b4ce949cb07271f5b678d5966d9df42.patch b/patches/source/xorg-server-xwayland/0003-6907b6ea2b4ce949cb07271f5b678d5966d9df42.patch new file mode 100644 index 000000000..11121070b --- /dev/null +++ b/patches/source/xorg-server-xwayland/0003-6907b6ea2b4ce949cb07271f5b678d5966d9df42.patch @@ -0,0 +1,181 @@ +From 6907b6ea2b4ce949cb07271f5b678d5966d9df42 Mon Sep 17 00:00:00 2001 +From: Peter Hutterer <peter.hutterer@who-t.net> +Date: Tue, 5 Jul 2022 11:11:06 +1000 +Subject: [PATCH] xkb: add request length validation for XkbSetGeometry + +No validation of the various fields on that report were done, so a +malicious client could send a short request that claims it had N +sections, or rows, or keys, and the server would process the request for +N sections, running out of bounds of the actual request data. + +Fix this by adding size checks to ensure our data is valid. + +ZDI-CAN 16062, CVE-2022-2319. + +This vulnerability was discovered by: +Jan-Niklas Sohn working with Trend Micro Zero Day Initiative + +Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> +--- + xkb/xkb.c | 43 ++++++++++++++++++++++++++++++++++++++----- + 1 file changed, 38 insertions(+), 5 deletions(-) + +diff --git a/xkb/xkb.c b/xkb/xkb.c +index 34b2c290b..4692895db 100644 +--- a/xkb/xkb.c ++++ b/xkb/xkb.c +@@ -5156,7 +5156,7 @@ _GetCountedString(char **wire_inout, ClientPtr client, char **str) + } + + static Status +-_CheckSetDoodad(char **wire_inout, ++_CheckSetDoodad(char **wire_inout, xkbSetGeometryReq *req, + XkbGeometryPtr geom, XkbSectionPtr section, ClientPtr client) + { + char *wire; +@@ -5167,6 +5167,9 @@ _CheckSetDoodad(char **wire_inout, + Status status; + + dWire = (xkbDoodadWireDesc *) (*wire_inout); ++ if (!_XkbCheckRequestBounds(client, req, dWire, dWire + 1)) ++ return BadLength; ++ + any = dWire->any; + wire = (char *) &dWire[1]; + if (client->swapped) { +@@ -5269,7 +5272,7 @@ _CheckSetDoodad(char **wire_inout, + } + + static Status +-_CheckSetOverlay(char **wire_inout, ++_CheckSetOverlay(char **wire_inout, xkbSetGeometryReq *req, + XkbGeometryPtr geom, XkbSectionPtr section, ClientPtr client) + { + register int r; +@@ -5280,6 +5283,9 @@ _CheckSetOverlay(char **wire_inout, + + wire = *wire_inout; + olWire = (xkbOverlayWireDesc *) wire; ++ if (!_XkbCheckRequestBounds(client, req, olWire, olWire + 1)) ++ return BadLength; ++ + if (client->swapped) { + swapl(&olWire->name); + } +@@ -5291,6 +5297,9 @@ _CheckSetOverlay(char **wire_inout, + xkbOverlayKeyWireDesc *kWire; + XkbOverlayRowPtr row; + ++ if (!_XkbCheckRequestBounds(client, req, rWire, rWire + 1)) ++ return BadLength; ++ + if (rWire->rowUnder > section->num_rows) { + client->errorValue = _XkbErrCode4(0x20, r, section->num_rows, + rWire->rowUnder); +@@ -5299,6 +5308,9 @@ _CheckSetOverlay(char **wire_inout, + row = XkbAddGeomOverlayRow(ol, rWire->rowUnder, rWire->nKeys); + kWire = (xkbOverlayKeyWireDesc *) &rWire[1]; + for (k = 0; k < rWire->nKeys; k++, kWire++) { ++ if (!_XkbCheckRequestBounds(client, req, kWire, kWire + 1)) ++ return BadLength; ++ + if (XkbAddGeomOverlayKey(ol, row, + (char *) kWire->over, + (char *) kWire->under) == NULL) { +@@ -5332,6 +5344,9 @@ _CheckSetSections(XkbGeometryPtr geom, + register int r; + xkbRowWireDesc *rWire; + ++ if (!_XkbCheckRequestBounds(client, req, sWire, sWire + 1)) ++ return BadLength; ++ + if (client->swapped) { + swapl(&sWire->name); + swaps(&sWire->top); +@@ -5357,6 +5372,9 @@ _CheckSetSections(XkbGeometryPtr geom, + XkbRowPtr row; + xkbKeyWireDesc *kWire; + ++ if (!_XkbCheckRequestBounds(client, req, rWire, rWire + 1)) ++ return BadLength; ++ + if (client->swapped) { + swaps(&rWire->top); + swaps(&rWire->left); +@@ -5371,6 +5389,9 @@ _CheckSetSections(XkbGeometryPtr geom, + for (k = 0; k < rWire->nKeys; k++, kWire++) { + XkbKeyPtr key; + ++ if (!_XkbCheckRequestBounds(client, req, kWire, kWire + 1)) ++ return BadLength; ++ + key = XkbAddGeomKey(row); + if (!key) + return BadAlloc; +@@ -5396,7 +5417,7 @@ _CheckSetSections(XkbGeometryPtr geom, + register int d; + + for (d = 0; d < sWire->nDoodads; d++) { +- status = _CheckSetDoodad(&wire, geom, section, client); ++ status = _CheckSetDoodad(&wire, req, geom, section, client); + if (status != Success) + return status; + } +@@ -5405,7 +5426,7 @@ _CheckSetSections(XkbGeometryPtr geom, + register int o; + + for (o = 0; o < sWire->nOverlays; o++) { +- status = _CheckSetOverlay(&wire, geom, section, client); ++ status = _CheckSetOverlay(&wire, req, geom, section, client); + if (status != Success) + return status; + } +@@ -5439,6 +5460,9 @@ _CheckSetShapes(XkbGeometryPtr geom, + xkbOutlineWireDesc *olWire; + XkbOutlinePtr ol; + ++ if (!_XkbCheckRequestBounds(client, req, shapeWire, shapeWire + 1)) ++ return BadLength; ++ + shape = + XkbAddGeomShape(geom, shapeWire->name, shapeWire->nOutlines); + if (!shape) +@@ -5449,12 +5473,18 @@ _CheckSetShapes(XkbGeometryPtr geom, + XkbPointPtr pt; + xkbPointWireDesc *ptWire; + ++ if (!_XkbCheckRequestBounds(client, req, olWire, olWire + 1)) ++ return BadLength; ++ + ol = XkbAddGeomOutline(shape, olWire->nPoints); + if (!ol) + return BadAlloc; + ol->corner_radius = olWire->cornerRadius; + ptWire = (xkbPointWireDesc *) &olWire[1]; + for (p = 0, pt = ol->points; p < olWire->nPoints; p++, pt++, ptWire++) { ++ if (!_XkbCheckRequestBounds(client, req, ptWire, ptWire + 1)) ++ return BadLength; ++ + pt->x = ptWire->x; + pt->y = ptWire->y; + if (client->swapped) { +@@ -5560,12 +5590,15 @@ _CheckSetGeom(XkbGeometryPtr geom, xkbSetGeometryReq * req, ClientPtr client) + return status; + + for (i = 0; i < req->nDoodads; i++) { +- status = _CheckSetDoodad(&wire, geom, NULL, client); ++ status = _CheckSetDoodad(&wire, req, geom, NULL, client); + if (status != Success) + return status; + } + + for (i = 0; i < req->nKeyAliases; i++) { ++ if (!_XkbCheckRequestBounds(client, req, wire, wire + XkbKeyNameLength)) ++ return BadLength; ++ + if (XkbAddGeomKeyAlias(geom, &wire[XkbKeyNameLength], wire) == NULL) + return BadAlloc; + wire += 2 * XkbKeyNameLength; +-- +GitLab + |