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Add OverlayFS cap_convert_nscap (CVE-2021-3493) #86

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Add OverlayFS cap_convert_nscap (CVE-2021-3493) #86

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Add OverlayFS cap_convert_nscap (CVE-2021-3493)
bcoles Apr 20, 2021
252e88b
Merge branch 'master' into patch-1
bcoles Mar 23, 2022
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12 changes: 12 additions & 0 deletions linux-exploit-suggester.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -904,6 +904,18 @@ author: GRIMM
EOF
)

EXPLOITS[((n++))]=$(cat <<EOF
Name: ${txtgrn}[CVE-2021-3493]${txtrst} OverlayFS cap_convert_nscap
Reqs: pkg=linux-kernel,ver<5.11,pkg=fuse-overlayfs
Tags: Ubuntu=14.04|16.04|18.04|20.04|20.10
Rank: 1
analysis-url: https://ssd-disclosure.com/ssd-advisory-overlayfs-pe/
src-url: https://raw.githubusercontent.com/briskets/CVE-2021-3493/main/exploit.c
Comments: Requires fuse-overlayfs. Likely specific to Ubuntu kernels only due to a patch which allows unprivileged overlayfs mounts.
author: SSD
EOF
)

EXPLOITS[((n++))]=$(cat <<EOF
Name: ${txtgrn}[CVE-2021-3490]${txtrst} eBPF ALU32 bounds tracking for bitwise ops
Reqs: pkg=linux-kernel,ver>=5.7,ver<5.12,CONFIG_BPF_SYSCALL=y,sysctl:kernel.unprivileged_bpf_disabled!=1
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