PT-2017-17787 · Red Hat · Cygwin

Erik Bray · Published 2017-07-21 · Updated 2019-10-09 · CVE-2017-7523

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Cygwin versions 1.7.2 through 1.8.0

Description The issue is related to a buffer overflow vulnerability in the wcsxfrm and wcsxfrm l functions. This can result in a denial-of-service by crashing the process or potentially allow hijacking of the process running with administrative privileges. The vulnerability can be triggered by a specially crafted input string.

Recommendations For Cygwin versions 1.7.2 through 1.8.0, consider updating to a version that includes a fix for the buffer overflow vulnerability in the wcsxfrm and wcsxfrm l functions. As a temporary workaround, restrict the use of these functions to minimize the risk of exploitation.

Exploit

Fix

Buffer Overflow

Memory Corruption

Weakness Enumeration

CWE-119

CWE-787

Related Identifiers

CVE-2017-7523

Affected Products

Cygwin

References · 3

• 🔥 https://cygwin.com/ml/cygwin/2017-05/msg00149.html · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2017-7523 · Security Note
• https://osv.dev/vulnerability/CVE-2017-7523 · Vendor Advisory