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CVE-2019-11191 PUBLISHED

The Linux kernel through 5.0.7, when CONFIG_IA32_AOUT is enabled and ia32_aout is loaded, allows local users to bypass ASLR on setuid a.out programs (if any exist) because install_exec_creds() is called too late in load_aout_binary() in fs/binfmt_aout.c, and thus the ptrace_may_access() check has a race condition when reading /proc/pid/stat. NOTE: the software maintainer disputes that this is a vulnerability because ASLR for a.out format executables has never been supported

EPSS 0.01% · 0.8th percentile

Risk Scores

EPSS Score
0.01%
0.8th percentile

Affected Products

VendorProductVersions
Ubuntu:Pro:FIPS:16.04:LTSlinux-fips4.4.0-1003.3, 0, 4.4.0-1010.13
Ubuntu:16.04:LTSlinux-aws4.4.0-1043.52, 4.4.0-1044.53, 4.4.0-1047.56
Ubuntu:20.04:LTSlinux-riscv5.4.0-24.28, 5.4.0-40.45, 5.4.0-39.44
Ubuntu:20.04:LTSlinux-azure-fde5.4.0-1085.90+cvm1.1, 5.4.0-1083.87+cvm1.1, 5.4.0-1080.83+cvm1.1
Ubuntu:18.04:LTSlinux-oem4.15.0-1018.21, 4.15.0-1038.43, 4.15.0-1036.41
Ubuntu:16.04:LTSlinux-azure0, 4.15.0-1045.49, 4.15.0-1037.39~16.04.1
Ubuntu:18.04:LTSlinux-oracle4.15.0-1008.10, 4.15.0-1013.15, 4.15.0-1011.13
Ubuntu:Pro:14.04:LTSlinux-aws4.4.0-1014.14, 4.4.0-1037.40, 0
Ubuntu:16.04:LTSlinux-kvm4.4.0-1004.9, 4.4.0-1046.52, 4.4.0-1044.50
Ubuntu:18.04:LTSlinux-snapdragon0, 4.4.0-1077.82, 4.4.0-1078.83
Ubuntu:16.04:LTSlinux-hwe4.15.0-38.41~16.04.1, 4.15.0-39.42~16.04.1, 4.15.0-42.45~16.04.1
Ubuntu:16.04:LTSlinux4.3.0-1.10, 4.4.0-72.93, 4.4.0-70.91
Ubuntu:22.04:LTSlinux-intel-iot-realtime0, 5.15.0-1073.75
Ubuntu:16.04:LTSlinux-oracle4.15.0-1008.10~16.04.1, 4.15.0-1009.11~16.04.1, 4.15.0-1010.12~16.04.1
Ubuntu:18.04:LTSlinux-azure4.15.0-1009.9, 4.15.0-1012.12, 4.15.0-1013.13
Ubuntu:18.04:LTSlinux-raspi24.15.0-1029.31, 4.15.0-1034.36, 4.15.0-1036.38
Ubuntu:16.04:LTSlinux-raspi24.4.0-1098.106, 4.4.0-1109.117, 4.4.0-1107.115
Ubuntu:22.04:LTSlinux-riscv5.15.0-1019.22, 5.13.0-1004.4, 5.13.0-1006.6+22.04.1
Ubuntu:Pro:20.04:LTSlinux-azure-fde-5.155.15.0-1053.61~20.04.1.1, 5.15.0-1054.62~20.04.1.1, 5.15.0-1056.64~20.04.1.1
Ubuntu:Pro:14.04:LTSlinux3.13.0-164.214, 3.11.0-12.19, 3.12.0-1.3

…and 15 more

Timeline

References

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