Buffer overflow in Cygwin
CVE-2017-7523
Cygwin versions 1.7.2 up to and including 1.8.0 are vulnerable to buffer overflow vulnerability in wcsxfrm/wcsxfrm_l functions resulting into denial-of-service by crashing the process or potential hijack of the process running with administrative privileges triggered by specially crafted input string.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.027 (85.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.027 · newest: 0.027 · change: 0.000
Affected products
- Cygwin — versions 1.7.2, 1.7.3, 1.7.5
- Red Hat, Inc. Cygwin — versions since 1.7.2 up to 2.8.0
Weakness classification (CWE)
References
- cygwin.com/ml/cygwin/2017-05/msg00149.html (Exploit, Mailing List, Vendor Advisory)
Frequently asked questions
- What is CVE-2017-7523?
- CVE-2017-7523 is a high-severity vulnerability in Cygwin, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2017-07-21.
- How severe is CVE-2017-7523?
- High severity. CVSS v3 base score is 7.5 out of 10.