Git-lfs Remote Code Execution (RCE) exploit CVE-2020-27955 (.bat / powershell version)

Vulnerable: git, GitHub CLI (gh), GitHub Desktop, Visual Studio Code, SourceTree, SmartGit, GitKraken etc.

Discovered by Dawid Golunski

• https://legalhackers.com
• https://exploitbox.io

Tested on Windows on:

git, GitHub CLI (gh), GitHub Desktop, Visual Studio Code, SourceTree, SmartGit, GitKraken etc.

Basically, the whole Windows dev world ;)

Check out the full advisories for details and patch information:

• https://exploitbox.io/vuln/Git-Git-LFS-RCE-Exploit-CVE-2020-27955.html
• https://legalhackers.com/advisories/Git-LFS-RCE-Exploit-CVE-2020-27955.html

Video PoC:

• https://youtu.be/tlptOf9w274

There's also a Go version of this exploit:

• https://github.com/ExploitBox/git-lfs-RCE-exploit-CVE-2020-27955-Go

                        .;lc'
                    .,cdkkOOOko;.
                 .,lxxkkkkOOOO000Ol'
             .':oxxxxxkkkkOOOO0000KK0x:'
          .;ldxxxxxxxxkxl,.'lk0000KKKXXXKd;.
       ':oxxxxxxxxxxo;.       .:oOKKKXXXNNNNOl.
      '';ldxxxxxdc,.              ,oOXXXNNNXd;,.
     .ddc;,,:c;.         ,c:         .cxxc:;:ox:
     .dxxxxo,     .,   ,kMMM0:.  .,     .lxxxxx:
     .dxxxxxc     lW. oMMMMMMMK  d0     .xxxxxx:
     .dxxxxxc     .0k.,KWMMMWNo :X:     .xxxxxx:
     .dxxxxxc      .xN0xxxxxxxkXK,      .xxxxxx:
     .dxxxxxc    lddOMMMMWd0MMMMKddd.   .xxxxxx:
     .dxxxxxc      .cNMMMN.oMMMMx'      .xxxxxx:
     .dxxxxxc     lKo;dNMN.oMM0;:Ok.    'xxxxxx:
     .dxxxxxc    ;Mc   .lx.:o,    Kl    'xxxxxx:
     .dxxxxxdl;. .,               .. .;cdxxxxxx:
     .dxxxxxxxxxdc,.              'cdkkxxxxxxxx:
      .':oxxxxxxxxxdl;.       .;lxkkkkkxxxxdc,.
          .;ldxxxxxxxxxdc, .cxkkkkkkkkkxd:.
             .':oxxxxxxxxx.ckkkkkkkkxl,.
                 .,cdxxxxx.ckkkkkxc.
                    .':odx.ckxl,.
                        .,.'.

• https://exploitbox.io
• https://twitter.com/Exploit_Box

Stay tuned