PT-2018-2591 · Gnu+1 · Glibc+1

Florian Weimer + 1 · Published 2018-11-27 · Updated 2024-06-15 · CVE-2019-7309

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions glibc versions through 2.29

Description The issue is related to the memcmp function in the GNU C Library, which has insufficient input validation. This can lead to incorrect results, potentially allowing an attacker to cause a denial of service. Specifically, for the x32 architecture, the memcmp function can incorrectly return zero, indicating that the inputs are equal, due to mishandling of the RDX most significant bit.

Recommendations For glibc versions through 2.29, consider updating to a version where this issue is fixed, as the current version may allow an attacker to exploit the memcmp function, leading to a denial of service. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

ALT-PU-2019-3114

BDU:2019-01066

CVE-2019-7309

OPENSUSE-SU-2024:10792-1

Affected Products

Alt Linux

Glibc

References · 82

• 🔥 https://sourceware.org/bugzilla/show_bug.cgi?id=24155 · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2019-7309 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-05821 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2019-7309 · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-01066 · Security Note
• https://osv.dev/vulnerability/openSUSE-SU-2024:10792-1 · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-00682 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9192 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20796 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-8985 · Security Note
• https://cve.org/CVERecord?id=CVE-2019-7309 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-11236 · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-11237 · Security Note
• https://security.gentoo.org/glsa/202006-04 · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-01772 · Security Note