{
  "schema_version": "1.7.0",
  "id": "MGASA-2018-0369",
  "published": "2018-09-07T10:15:03Z",
  "modified": "2018-09-07T09:51:04Z",
  "summary": "Updated libxkbcommon packages fix security vulnerabilities",
  "details": "Updated libxkbcommon packages fix security vulnerabilities:\n\nEndless recursion exists in xkbcomp/expr.c in xkbcommon and libxkbcommon\nbefore 0.8.1, which could be used by local attackers to crash xkbcommon\nusers by supplying a crafted keymap file that triggers boolean negation\n(CVE-2018-15853).\n\nUnchecked NULL pointer usage in xkbcommon before 0.8.1 could be used by\nlocal attackers to crash (NULL pointer dereference) the xkbcommon parser\nby supplying a crafted keymap file, because geometry tokens were\ndesupported incorrectly (CVE-2018-15854).\n\nUnchecked NULL pointer usage in xkbcommon before 0.8.1 could be used by\nlocal attackers to crash (NULL pointer dereference) the xkbcommon parser\nby supplying a crafted keymap file, because the XkbFile for an xkb_geometry\nsection was mishandled (CVE-2018-15855).\n\nAn infinite loop when reaching EOL unexpectedly in compose/parser.c (aka\nthe keymap parser) in xkbcommon before 0.8.1 could be used by local\nattackers to cause a denial of service during parsing of crafted keymap\nfiles (CVE-2018-15856).\n\nAn invalid free in ExprAppendMultiKeysymList in xkbcomp/ast-build.c in\nxkbcommon before 0.8.1 could be used by local attackers to crash xkbcommon\nkeymap parsers or possibly have unspecified other impact by supplying a\ncrafted keymap file (CVE-2018-15857).\n\nUnchecked NULL pointer usage when handling invalid aliases in\nCopyKeyAliasesToKeymap in xkbcomp/keycodes.c in xkbcommon before 0.8.1\ncould be used by local attackers to crash (NULL pointer dereference) the\nxkbcommon parser by supplying a crafted keymap file (CVE-2018-15858).\n\nUnchecked NULL pointer usage when parsing invalid atoms in ExprResolveLhs\nin xkbcomp/expr.c in xkbcommon before 0.8.2 could be used by local\nattackers to crash (NULL pointer dereference) the xkbcommon parser by\nsupplying a crafted keymap file, because lookup failures are mishandled\n(CVE-2018-15859).\n\nUnchecked NULL pointer usage in ExprResolveLhs in xkbcomp/expr.c in\nxkbcommon before 0.8.2 could be used by local attackers to crash (NULL\npointer dereference) the xkbcommon parser by supplying a crafted keymap\nfile that triggers an xkb_intern_atom failure (CVE-2018-15861).\n\nUnchecked NULL pointer usage in LookupModMask in xkbcomp/expr.c in\nxkbcommon before 0.8.2 could be used by local attackers to crash (NULL\npointer dereference) the xkbcommon parser by supplying a crafted keymap\nfile with invalid virtual modifiers (CVE-2018-15862).\n\nUnchecked NULL pointer usage in ResolveStateAndPredicate in\nxkbcomp/compat.c in xkbcommon before 0.8.2 could be used by local attackers\nto crash (NULL pointer dereference) the xkbcommon parser by supplying a\ncrafted keymap file with a no-op modmask expression (CVE-2018-15863).\n\nUnchecked NULL pointer usage in resolve_keysym in xkbcomp/parser.y in\nxkbcommon before 0.8.2 could be used by local attackers to crash (NULL\npointer dereference) the xkbcommon parser by supplying a crafted keymap\nfile, because a map access attempt can occur for a map that was never\ncreated (CVE-2018-15864).\n",
  "upstream": [
    "CVE-2018-15853",
    "CVE-2018-15854",
    "CVE-2018-15855",
    "CVE-2018-15856",
    "CVE-2018-15857",
    "CVE-2018-15858",
    "CVE-2018-15859",
    "CVE-2018-15861",
    "CVE-2018-15862",
    "CVE-2018-15863",
    "CVE-2018-15864"
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://advisories.mageia.org/MGASA-2018-0369.html"
    },
    {
      "type": "REPORT",
      "url": "https://bugs.mageia.org/show_bug.cgi?id=23506"
    },
    {
      "type": "WEB",
      "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/377JCLG64STYRNYZZ4B5QKGX2MAW6JUX/"
    }
  ],
  "affected": [
    {
      "package": {
        "ecosystem": "Mageia:6",
        "name": "libxkbcommon",
        "purl": "pkg:rpm/mageia/libxkbcommon?arch=source&distro=mageia-6"
      },
      "ranges": [
        {
          "type": "ECOSYSTEM",
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.8.2-1.mga6"
            }
          ]
        }
      ],
      "ecosystem_specific": {
        "section": "core"
      }
    }
  ],
  "credits": [
    {
      "name": "Mageia",
      "type": "COORDINATOR",
      "contact": [
        "https://wiki.mageia.org/en/Packages_Security_Team"
      ]
    }
  ]
}