PT-2018-1821 · Beep · Beep

Pirhack · Published 2018-04-02 · Updated 2019-03-14 · CVE-2018-0492

Positive Technologies (AI Summary)

CVSS v3.1

7.0

High

Base vector

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

Name of the Vulnerable Software and Affected Versions beep versions through 1.3.4

Description The issue is related to a race condition in the beep utility's handling of signals, specifically SIGINT and SIGTERM, which can lead to the exploitation of the free() function. This exploitation may allow an attacker to gain access to confidential information or block the execution of arbitrary applications by interrupting the free() function with another signal, thus disrupting the data structures in use.

Recommendations For versions through 1.3.4, consider removing the setuid bit to prevent local privilege escalation until a patch is available. As a temporary workaround, consider restricting access to the beep utility to minimize the risk of exploitation.

Exploit

Fix

LPE

Race Condition

Weakness Enumeration

CWE-362

Related Identifiers

BDU:2018-01421

CVE-2018-0492

DLA-1338-1

DSA-4163-1

Affected Products

Beep

References · 16

• 🔥 https://github.com/qazbnm456/awesome-cve-poc/blob/master/CVE-2018-0492.md · Exploit
• 🔥 https://exploit-db.com/exploits/44452 · Exploit
• https://osv.dev/vulnerability/DEBIAN-CVE-2018-0492 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-0492 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2018-0492 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2018-0492 · Security Note
• https://bdu.fstec.ru/vul/2018-01421 · Security Note
• https://debian.org/security/2018/dsa-4163 · Vendor Advisory
• https://ubuntu.com/security/CVE-2018-0492 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-0492 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-0492 · Vendor Advisory
• https://security.gentoo.org/glsa/201805-15 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-0492; · Security Note
• https://osv.dev/vulnerability/DSA-4163-1 · Vendor Advisory
• https://lists.debian.org/debian-security-announce/2018/msg00089.html · Note