PT-2018-9239 · Fmtlib · Fmtlib

Stephan Zeisberg · Published 2018-02-09 · Updated 2020-08-24 · CVE-2018-1000052

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: fmtlib versions prior to 4.1.0

Description: The issue is related to a memory corruption problem that can cause a Denial of Service. It occurs when an invalid format specifier is used in the fmt::print() function, resulting in a SIGSEGV due to memory corruption. This can be exploited by specifying an invalid format specifier in the fmt::print() function.

Recommendations: For versions prior to 4.1.0, update to version 4.1.0 or later to resolve the issue. As a temporary workaround, consider validating format specifiers before passing them to the fmt::print() function to minimize the risk of exploitation.

Exploit

Fix

Use of Externally-Controlled Format String

Weakness Enumeration

CWE-134

Related Identifiers

CVE-2018-1000052

Affected Products

Fmtlib

References · 9

• 🔥 https://github.com/fmtlib/fmt/issues/642 · Exploit
• https://github.com/fmtlib/fmt/commit/8cf30aa2be256eba07bb1cefb998c52326e846e7 · Patch
• https://cve.org/CVERecord?id=CVE-2018-1000052 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2018-1000052 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-1000052 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-1000052 · Security Note
• https://osv.dev/vulnerability/CVE-2018-1000052 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-1000052 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2018-1000052 · Vendor Advisory