Input validation error in Fedora - CVE-2016-8605
Published: January 13, 2017 / Updated: August 4, 2020
Vulnerability identifier: #VU33794
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2016-8605
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Fedoraproject
Affected software:
Fedora
Fedora
Detailed vulnerability description
The vulnerability allows a remote non-authenticated attacker to manipulate data.
The mkdir procedure of GNU Guile temporarily changed the process' umask to zero. During that time window, in a multithreaded application, other threads could end up creating files with insecure permissions. For example, mkdir without the optional mode argument would create directories as 0777. This is fixed in Guile 2.0.13. Prior versions are affected.
How to mitigate CVE-2016-8605
Install update from vendor's website.
Sources
- http://www.openwall.com/lists/oss-security/2016/10/12/1
- http://www.securityfocus.com/bid/93510
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6QTAGSDCTYXTABAA77BQJGNKOOBRV4DK/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FNVE5N24FLWDYBQ3LAFMF6BFCWKDO7VM/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UJP5S36GTXMDEBXWF6LKKV76DSLNQG44/