In the Linux kernel, the following vulnerability has been resolved: pptp: ensure minimal skb length in pptp_xmit() Commit aabc6596ffb3 ("net: ppp: Add bound checking for skb data on ppp_sync_txmung") fixed ppp_sync_txmunge() We need a similar fix in pptp_xmit(), otherwise we might read uninit data as reported by syzbot. BUG: KMSAN: uninit-value in pptp_xmit+0xc34/0x2720 drivers/net/ppp/pptp.c:193 pptp_xmit+0xc34/0x2720 drivers/net/ppp/pptp.c:193 ppp_channel_bridge_input drivers/net/ppp/ppp_generic.c:2290 [inline] ppp_input+0x1d6/0xe60 drivers/net/ppp/ppp_generic.c:2314 pppoe_rcv_core+0x1e8/...
In the Linux kernel, the following vulnerability has been resolved: pptp: ensure minimal skb length in pptp_xmit() Commit aabc6596ffb3 ("net: ppp: Add bound checking for skb data on ppp_sync_txmung") fixed ppp_sync_txmunge() We need a similar fix in pptp_xmit(), otherwise we might read uninit data as reported by syzbot. BUG: KMSAN: uninit-value in pptp_xmit+0xc34/0x2720 drivers/net/ppp/pptp.c:193 pptp_xmit+0xc34/0x2720 drivers/net/ppp/pptp.c:193 ppp_channel_bridge_input drivers/net/ppp/ppp_generic.c:2290 [inline] ppp_input+0x1d6/0xe60 drivers/net/ppp/ppp_generic.c:2314 pppoe_rcv_core+0x1e8/...
Linux Linux, linux kernel, debian linux의 현재 전체 버전이 공식 영향 범위(Linux Linux, linux kernel, debian linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 97b8c5d322c5c0038cac4bc56fdbe237d0be426f, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 26672f1679b143aa34fca0b6046b7fd0c184770d, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5de7513f38f3c19c0610294ee478242bea356f8c, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 504cc4ab91073d2ac7404ad146139f86ecee7193, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5005d24377378a20e5c0e53052fc4ebdcdcbc611, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ea99b88b1999ebcb24d5d3a6b7910030f40d3bba, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b7dcda76fd0615c0599c89f36873a6cd48e02dbb, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1a04db0fd75cb6034fc27a56b67b3b8b9022a98c, >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < de9c4861fb42f0cd72da844c3c34f692d5895b7b, >= 2.6.12, >= 2.6.13 < 5.4.297, >= 5.5 < 5.10.241, >= 5.11 < 5.15.190, >= 5.16 < 6.1.148, >= 6.2 < 6.6.102, >= 6.7 < 6.12.42, >= 6.13 < 6.15.10, >= 6.16 < 6.16.1, 2.6.12, 11.0)에 포함되는지 확인합니다. OS를 선택하면 해당 OS의 제품·패키지·KB·APAR 확인 명령만 표시됩니다.
조치방안
제3자 참조와 수정 버전 값(5.4.297, 5.10.241, 5.15.190, 6.1.148, 6.6.102, 6.12.42, 6.15.10, 6.16.1)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, debian linux 5.4.297, 5.10.241, 5.15.190, 6.1.148, 6.6.102, 6.12.42, 6.15.10, 6.16.1 기준을 충족하는지 확인합니다. 이어서 유형 미확정 관련 오류·공격 흔적이 새로 발생하지 않는지 확인합니다.
