PT-2023-7535 · Unknown · Secuextender Ssl Vpn Client

Daniele Scanu + 1 · Published 2023-11-20 · Updated 2023-11-30 · CVE-2023-5593

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions SecuExtender SSL VPN Client version 4.0.4.0

Description The issue is related to an out-of-bounds write vulnerability in the SecuExtender SSL VPN Client software. This vulnerability could allow an authenticated local user to gain privilege escalation by sending a crafted CREATE message. The vulnerability is associated with a buffer overflow in memory, which can be exploited to elevate privileges.

Recommendations For version 4.0.4.0, consider restricting access to the CREATE message functionality until a patch is available. As a temporary workaround, disabling the vulnerable component related to the out-of-bounds write vulnerability may help minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Memory Corruption

Weakness Enumeration

CWE-787

Related Identifiers

BDU:2023-08589

CVE-2023-5593

Affected Products

Secuextender Ssl Vpn Client

References · 6

• https://osv.dev/vulnerability/CVE-2023-5593 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-08589 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-5593 · Security Note
• https://zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-out-of-bounds-write-vulnerability-in-secuextender-ssl-vpn-client-software · Vendor Advisory
• https://t.me/cvenotify/60756 · Telegram Post
• https://t.me/cvenotify/61700 · Telegram Post