In the Linux kernel, the following vulnerability has been resolved: isofs: validate block number from NFS file handle in isofs_export_iget isofs_fh_to_dentry() and isofs_fh_to_parent() pass an attacker- controlled block number (ifid->block or ifid->parent_block) from the NFS file handle to isofs_export_iget(), which only rejects block == 0 before calling isofs_iget() and ultimately sb_bread(). A crafted file handle with fh_len sufficient to pass the check added by commit 0405d4b63d08 ("isofs: Prevent the use of too small fid") can still drive the server to read any in-range block on the bac...
In the Linux kernel, the following vulnerability has been resolved: isofs: validate block number from NFS file handle in isofs_export_iget isofs_fh_to_dentry() and isofs_fh_to_parent() pass an attacker- controlled block number (ifid->block or ifid->parent_block) from the NFS file handle to isofs_export_iget(), which only rejects block == 0 before calling isofs_iget() and ultimately sb_bread(). A crafted file handle with fh_len sufficient to pass the check added by commit 0405d4b63d08 ("isofs: Prevent the use of too small fid") can still drive the server to read any in-range block on the bac...
영향 제품·버전
제품 Linux Linux, linux kernel
영향 버전 Linux Linux, linux kernel 5e7de55602c61c8ff28db075cc49c8dd6989d7e0, 63d5a3e207bf315a32c7d16de6c89753a759f95a, 0fdafdaef796816a9ed0fd7ac812932d569d9beb, 952e7a7e317f126d0a2b879fc531b716932d5ffa, 56dfffea9fd3be0b3795a9ca6401e133a8427e0b, 0405d4b63d082861f4eaff9d39c78ee9dc34f845, ee01a309ebf598be1ff8174901ed6e91619f1749, 007124c896e7d4614ac1f6bd4dedb975c35a2a8e, 5.10.237, 5.15.181, 6.1.135, 6.6.88, 6.12.25, 5.4.293, 6.14.4, 6.15, >= 5.4.293 < 5.5, >= 5.10.237 < 5.10.258, >= 5.15.181 < 5.15.209, >= 6.1.135 < 6.1.175
수정 버전 Linux Linux, linux kernel 5.5, 5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.88, 6.15, 6.18.30, 7.0.7
Linux Linux, linux kernel의 현재 전체 버전이 공식 영향 범위(Linux Linux, linux kernel 5e7de55602c61c8ff28db075cc49c8dd6989d7e0, 63d5a3e207bf315a32c7d16de6c89753a759f95a, 0fdafdaef796816a9ed0fd7ac812932d569d9beb, 952e7a7e317f126d0a2b879fc531b716932d5ffa, 56dfffea9fd3be0b3795a9ca6401e133a8427e0b, 0405d4b63d082861f4eaff9d39c78ee9dc34f845, ee01a309ebf598be1ff8174901ed6e91619f1749, 007124c896e7d4614ac1f6bd4dedb975c35a2a8e, 5.10.237, 5.15.181, 6.1.135, 6.6.88, 6.12.25, 5.4.293, 6.14.4, 6.15, >= 5.4.293 < 5.5, >= 5.10.237 < 5.10.258, >= 5.15.181 < 5.15.209, >= 6.1.135 < 6.1.175)에 포함되는지 확인합니다. OS를 선택하면 해당 OS의 제품·패키지·KB·APAR 확인 명령만 표시됩니다.
조치방안
제3자 참조와 수정 버전 값(5.5, 5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.88, 6.15, 6.18.30, 7.0.7)은 보조 근거로만 사용하고, 공급사 공식 보안 권고에서 조치 기준을 재확인합니다.
조치 후 확인사항
패치 후 같은 명령으로 전체 버전을 다시 확인해 Linux Linux, linux kernel 5.5, 5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.88, 6.15, 6.18.30, 7.0.7 기준을 충족하는지 확인합니다. 이어서 유형 미확정 관련 오류·공격 흔적이 새로 발생하지 않는지 확인합니다.
