CVE-2016-2856
- Source
- https://cve.org/CVERecord?id=CVE-2016-2856
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2016-2856.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2016-2856
- Downstream
- Published
- 2016-03-14T01:59:04.950Z
- Modified
- 2026-03-12T22:17:31.562971Z
- Severity
-
- 8.4 (High) CVSS_V3 - CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
ptchown in the glibc package before 2.19-18+deb8u4 on Debian jessie; the elibc package before 2.15-0ubuntu10.14 on Ubuntu 12.04 LTS and before 2.19-0ubuntu6.8 on Ubuntu 14.04 LTS; and the glibc package before 2.21-0ubuntu4.2 on Ubuntu 15.10 and before 2.23-0ubuntu1 on Ubuntu 16.04 LTS and 16.10 lacks a namespace check associated with file-descriptor passing, which allows local users to capture keystrokes and spoof data, and possibly gain privileges, via pts read and write operations, related to debian/sysdeps/linux.mk. NOTE: this is not considered a vulnerability in the upstream GNU C Library because the upstream documentation has a clear security recommendation against the --enable-ptchown option.
- References
-
- http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie&id=09f7764882a81e13e7b5d87d715412283a6ce403
- http://www.securityfocus.com/bid/84601
- http://anonscm.debian.org/cgit/pkg-glibc/glibc.git/commit/?h=jessie&id=11475c083282c1582c4dd72eecfcb2b7d308c958
- http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-2856.html
- http://www.halfdog.net/Security/2015/PtChownArbitraryPtsAccessViaUserNamespace/
- http://www.openwall.com/lists/oss-security/2016/02/23/3
- http://www.openwall.com/lists/oss-security/2016/03/07/2
- http://www.ubuntu.com/usn/USN-2985-2
- http://www.ubuntu.com/usn/USN-2985-1
Affected packages
Git /
Database specific
source
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2016-2856.json"
unresolved_ranges
[
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "12.04"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "14.04"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "15.10"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "8.0"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.19-18+deb8u4"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.15-0ubuntu10.14"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.19-0ubuntu6.8"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.21-0ubuntu4.2"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.23-0ubuntu1"
}
]
}
]