In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix out-of-bounds read in smb_check_perm_dacl() The permission-check ACE walk in smb_check_perm_dacl() validates the ACE header size and caps sid.num_subauth at SID_MAX_SUB_AUTHORITIES, but it never checks that ace->size is actually large enough to contain num_subauth sub-authorities before compare_sids() dereferences them. CIFS_SID_BASE_SIZE covers the SID header up to but excluding the sub_auth[] array, and offsetof(struct smb_ace, sid) is the ACE header, so the existing guards only guarantee the 8-byte SID base, i...
In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix out-of-bounds read in smb_check_perm_dacl() The permission-check ACE walk in smb_check_perm_dacl() validates the ACE header size and caps sid.num_subauth at SID_MAX_SUB_AUTHORITIES, but it never checks that ace->size is actually large enough to contain num_subauth sub-authorities before compare_sids() dereferences them. CIFS_SID_BASE_SIZE covers the SID header up to but excluding the sub_auth[] array, and offsetof(struct smb_ace, sid) is the ACE header, so the existing guards only guarantee the 8-byte SID base, i...
Linux Linux, linux kernel의 현재 전체 버전이 공식 영향 범위(Linux Linux, linux kernel >= 282cbbb476b9f35793452bc461934af4c7eca169 < c7488c85fd822959e9b5c22fbd9e7c8a21caf5e0, >= f20adc4ef7428bc485ee83fd1a592252fb87718b < 988c93d3bba066d8669143e6ec30bb2be9608d53, >= 325d4ac11f526cb8964cff14548ccf02d8c756d8 < 36599894fa8536fefdf1e296c0af71b8b7226859, >= 95e5aa3c3261da8c95b27d7aecf8ee39b9f86a4c < d5c81a095c86fe507c032d08f3a8cfc518444927, >= 90089584b2e25c4510b7b987387b4405f0673ece < 7627ff8c4f9919f14de562b0160ab4ec9d80b1f7, >= d07b26f39246a82399661936dd0c853983cfade7 < e36e35660adb9b8ef1435ac359151dda5f094c55, >= d07b26f39246a82399661936dd0c853983cfade7 < 1ef06004ed4bd6d3ed8c840d9d1a376b66d4935b, >= 151b1799861fde38087c08f613abc2843ef597b0, >= 5.15.210 < 5.15.212, >= 6.1.176 < 6.1.177, >= 6.6.140 < 6.6.144, >= 6.12.84 < 6.12.95, >= 6.18.25 < 6.18.38, >= 7.0.2 < 7.1, >= 7.1, >= 7.0.2 < 7.1.3, 6.1.176)에 포함되는지 확인합니다. OS를 선택하면 해당 OS의 제품·패키지·KB·APAR 확인 명령만 표시됩니다.
조치방안
제3자 참조와 수정 버전 값(5.15.212, 6.6.144, 6.12.95, 6.18.38, 7.1.3)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 5.15.212, 6.6.144, 6.12.95, 6.18.38, 7.1.3 기준을 충족하는지 확인합니다. 이어서 메모리 손상 관련 오류·공격 흔적이 새로 발생하지 않는지 확인합니다.
