hsec-2023-0009
osv_haskell
Description
# *git-annex* command injection via malicious SSH hostname *git-annex* was vulnerable to the same class of security hole as git's **CVE-2017-1000117**. In several cases, `git-annex` parses a repository URL, and uses it to generate a `ssh` command, with the hostname to ssh to coming from the URL. If the hostname it parses is something like `-eProxyCommand=evil`, this could result in arbitrary local code execution. Some details of URL parsing may prevent the exploit working in some cases. Exploiting this would involve the attacker tricking the victim into adding a remote something like `ssh://-eProxyCommand=evil/blah`. One possible avenue for an attacker that avoids exposing the URL to the user is to use `initremote` with an SSH remote, so embedding the URL in the *git-annex* branch. Then the victim would enable it with `enableremote`. This was fixed in version **6.20170818**. Now there's a `SshHost` type that is not allowed to start with a dash, and every invocation of `git-annex` uses a function that takes a `SshHost`.
Timeline
- Published
- unknown
- Last Modified
- unknown
CVSS Details
CVSS details not available.
Affected Products
No product information available.
References
Linked Vulnerabilities
No linked vulnerabilities found.
{
"affected": [
{
"database_specific": {
"human_link": "https://github.com/haskell/security-advisories/tree/main/advisories/published/2023/HSEC-2023-0009.md",
"osv": "https://raw.githubusercontent.com/haskell/security-advisories/refs/heads/generated/osv-export/2023/HSEC-2023-0009.json",
"source": "https://github.com/haskell/security-advisories/blob/generated/osv-export/2023/HSEC-2023-0009.json"
},
"package": {
"ecosystem": "Hackage",
"name": "git-annex",
"purl": "pkg:hackage/git-annex"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "6.20170818"
}
],
"type": "ECOSYSTEM"
}
],
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"versions": [
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],
"aliases": [
"CVE-2017-12976"
],
"database_specific": {
"home": "https://github.com/haskell/security-advisories",
"osvs": "https://raw.githubusercontent.com/haskell/security-advisories/refs/heads/generated/osv-export",
"repository": "https://github.com/haskell/security-advisories"
},
"details": "# *git-annex* command injection via malicious SSH hostname\n\n*git-annex* was vulnerable to the same class of security hole as\ngit's **CVE-2017-1000117**. In several cases, `git-annex` parses a\nrepository URL, and uses it to generate a `ssh` command, with the\nhostname to ssh to coming from the URL. If the hostname it parses is\nsomething like `-eProxyCommand=evil`, this could result in arbitrary\nlocal code execution.\n\nSome details of URL parsing may prevent the exploit working in some\ncases.\n\nExploiting this would involve the attacker tricking the victim into\nadding a remote something like `ssh://-eProxyCommand=evil/blah`.\n\nOne possible avenue for an attacker that avoids exposing the URL to\nthe user is to use `initremote` with an SSH remote, so embedding the\nURL in the *git-annex* branch. Then the victim would enable it with\n`enableremote`.\n\nThis was fixed in version **6.20170818**. Now there's a `SshHost`\ntype that is not allowed to start with a dash, and every invocation\nof `git-annex` uses a function that takes a `SshHost`.\n",
"id": "HSEC-2023-0009",
"modified": "2026-02-04T04:19:21.699316Z",
"published": "2025-11-14T14:45:34Z",
"references": [
{
"type": "ADVISORY",
"url": "https://git-annex.branchable.com/security/CVE-2017-12976/"
},
{
"type": "FIX",
"url": "http://source.git-annex.branchable.com/?p=source.git;a=commitdiff;h=df11e54788b254efebb4898b474de11ae8d3b471"
}
],
"related": [
"CVE-2017-1000116",
"CVE-2017-1000117",
"CVE-2017-12836",
"CVE-2017-9800"
],
"schema_version": "1.7.5",
"summary": "git-annex command injection via malicious SSH hostname"
}