PT-2020-1755 · Moxa · Moxa Awk-3131A

Carl Hurd · Published 2020-02-25 · Updated 2022-06-13 · CVE-2019-5148

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Moxa AWK-3131A firmware version 1.13

Description A denial-of-service issue exists in the ServiceAgent functionality due to an integer underflow. This underflow can trigger a large memcpy, accessing unmapped or out-of-bounds memory. An attacker can exploit this by sending a specially crafted packet without authentication. The vulnerability is related to a heap-based buffer overflow, which can be exploited by a remote attacker to cause a denial-of-service.

Recommendations For Moxa AWK-3131A firmware version 1.13, consider restricting access to the ServiceAgent functionality until a patch is available. As a temporary workaround, avoid using the ServiceAgent functionality to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Out of bounds Read

Integer Underflow

Weakness Enumeration

CWE-125

CWE-191

Related Identifiers

BDU:2020-00995

CVE-2019-5148

Affected Products

Moxa Awk-3131A

References · 8

• 🔥 https://talosintelligence.com/vulnerability_reports/TALOS-2019-0938 · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2019-5148 · Security Note
• https://osv.dev/vulnerability/CVE-2019-5148 · Vendor Advisory
• https://bdu.fstec.ru/vul/2020-00995 · Security Note
• https://t.me/cvenotify/31537 · Telegram Post
• https://moxa.ru/novosti/tidings/prod/ustranenie-uyazvimostej-tochek-dostupa-moxa-awk-3131a · Note
• https://t.me/cvenotify/1210 · Telegram Post
• https://moxa.com/en/support/support/security-advisory/awk-3131a-series-industrial-ap-bridge-client-vulnerabilities · Note