Auth bypass in GNU Screen
CVE-2017-5618
GNU screen before 4.5.1 allows local users to modify arbitrary files and consequently gain root privileges by leveraging improper checking of logfile permissions.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.011 (63.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- git.savannah.gnu.org/cgit/screen.git/tree/src/ChangeLog (Third Party Advisory, Release Notes)
- savannah.gnu.org/bugs/ (Third Party Advisory)
- www.openwall.com/lists/oss-security/2017/01/29/3 (mailing-list, Exploit, Mailing List, Third Party Advisory)
- git.savannah.gnu.org/cgit/screen.git/patch/ (Patch, Third Party Advisory)
- www.securityfocus.com/bid/95873 (VDB Entry, Third Party Advisory, vdb-entry)
- lists.gnu.org/archive/html/screen-devel/2017-01/msg00025.html (mailing-list, Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-5618?
- CVE-2017-5618 is a high-severity vulnerability in GNU Screen, classified under Incorrect Authorization. CVSS score: 7.8/10. Published 2017-03-20.
- How severe is CVE-2017-5618?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2017-5618 known to be exploited?
- 16 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.