PT-2017-4215 · Gnu+2 · Gnu C Library+2

Florian Weimer · Published 2017-10-20 · Updated 2019-10-03 · CVE-2017-15671

Positive Technologies (AI Summary)

CVSS v2.0

7.1

High

Base vector

AV:N/AC:M/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions GNU C Library (aka glibc or libc6) versions prior to 2.27

Description The issue is related to the glob function in the GNU C Library, specifically when invoked with GLOB TILDE and processing the ~ operator with a long user name. This could lead to a denial of service due to a memory leak. The vulnerability can be exploited by a remote attacker to cause a service disruption.

Recommendations For GNU C Library versions prior to 2.27, update to version 2.27 or later to resolve the issue. As a temporary workaround, consider restricting the use of the glob function with GLOB TILDE to minimize the risk of exploitation.

Exploit

Fix

DoS

Missing Release of Resource after Effective Lifetime

Weakness Enumeration

CWE-772

Related Identifiers

ALT-PU-2017-2833

BDU:2022-05948

CVE-2017-15671

MGASA-2017-0464

MGASA-2017-0470

OPENSUSE-SU-2018_0089-1

SUSE-SU-2018:0074-1

SUSE-SU-2018:2185-1

SUSE-SU-2018:2187-1

SUSE-SU-2018:4067-1

SUSE-SU-2018_4067-1

Affected Products

Alt Linux

Gnu C Library

Suse

References · 96

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/local/glibc_realpath_priv_esc.rb · Exploit
• 🔥 https://github.com/qazbnm456/awesome-cve-poc/blob/master/Stack-Clash.md · Exploit
• 🔥 https://github.com/0x00-0x00/CVE-2018-1000001 · Exploit
• https://osv.dev/vulnerability/SUSE-SU-2018:0074-1 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2017-0464.html · Security Note
• http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-15671 · Security Note
• https://bdu.fstec.ru/vul/2022-05948 · Security Note
• https://bdu.fstec.ru/vul/2017-02451 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2017-15671 · Vendor Advisory
• https://advisories.mageia.org/MGASA-2017-0470.html · Security Note
• https://errata.altlinux.org/ALT-PU-2017-2833 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-07723 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2018:2187-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2017-15671 · Security Note
• https://bdu.fstec.ru/vul/2023-07724 · Security Note