Check linux sources dump for known CVEs.
CVEhound is a tool for checking linux sources for known CVEs. The tool is based on coccinelle rules and grep patterns. The tool checks sources for vulnerable code patterns of known CVEs and missing fixes for them.
Linux Security Summit 2021 Presentation (EN)
ZeroNights 2021 Presentation (RU)
Install prerequisites:
# Ubuntu, coccinelle uses libpython2.7 internally
# Seems like some ppas mark libpython dependency as optional
$ sudo add-apt-repository ppa:npalix/coccinelle
$ sudo apt install python3-pip coccinelle libpython2.7
# Fedora
$ sudo dnf install python3-pip coccinelle
# macOS
$ brew install coccinelle
To install the latest stable version just run the following command:
$ python3 -m pip install --user cvehound
For development purposes you may install cvehound in "editable" mode directly from the repository (clone it on your computer beforehand):
$ pip install -e .
To update the cve rules from github repository:
$ cvehound_update_rules
The simplest way to start using CVEhound is to run the following command:
$ cvehound --kernel ~/linux
Found: CVE-2020-27830
Found: CVE-2020-27152
Found: CVE-2020-29371
Found: CVE-2020-26088
where dir should point to linux kernel sources. CVEhound will check the sources for all cve patterns that you can find in cve dir. To check the sources for particular CVEs one can use:
$ cvehound --kernel ./linux --kernel-config --cve CVE-2020-27194 CVE-2020-29371
Checking: CVE-2020-27194
Found: CVE-2020-27194
MSG: bpf: Fix scalar32_min_max_or bounds tracking
CWE: Improper Restriction of Operations within the Bounds of a Memory Buffer
FIX DATE: 2020-10-08 09:02:53
https://www.linuxkernelcves.com/cves/CVE-2020-27194
Affected Files:
- linux/kernel/bpf/verifier.c: CONFIG_BPF & CONFIG_BPF_SYSCALL
linux/.config: affected
Config: ./linux/.config affected
Checking: CVE-2020-29371
Found: CVE-2020-29371
MSG: romfs: fix uninitialized memory leak in romfs_dev_read()
CWE: Use of Uninitialized Resource
FIX DATE: 2020-08-21 16:52:53
https://www.linuxkernelcves.com/cves/CVE-2020-29371
Affected Files:
- linux/fs/romfs/storage.c: CONFIG_ROMFS_FS
linux/.config: not affected
Config: ./linux/.config not affected
Other args:
--report
- will produce json file with found CVEs
Most of metainformation in generated report is taken from linuxkernelcves.com--kernel-config
or --kernel-config <file>
- will infer the kernel configuration required to
build the affected code (based on Kbuild/Makefiles, ifdefs are not checked) and
check kernel .config file if there is one--files
, --cwe
- will limit the scope of checked cves to the kernel files of
interest or specific CWE classes--exploit
- check only for CVEs that are known to be exploitable (according to
the FSTEC BDU database)Python code is licensed under GPLv3. All rules in cvehound/cve folder are licensed under GPLv2.
I would like to thank the following projects and people behind them: