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CISCO WARNS ANYCONNECT VPNS UNDER ACTIVE CYBERATTACK

Older bugs in the AnyConnect Secure Mobility Client are being targeted in the
wild, showcasing patch-management failures.
Tara Seals
Managing Editor, News, Dark Reading
October 26, 2022
Source: The lightwriter via Alamy Stock Photo
PDF


A pair of known security vulnerabilities in the Cisco AnyConnect Secure Mobility
Client for Windows is being actively exploited in the wild, despite being
patched for two-plus years.



The networking giant is warning that cybercrime groups are pressing two local
privilege escalation (LPE) bugs into service, with active exploit chains against
the VPN platform being observed starting this month.

The first flaw (CVE-2020-3153, with a CVSS score of 6.5) would allow a logged-in
user to send a specially crafted IPC message to the AnyConnect process to
perform DLL hijacking and execute arbitrary code on the affected machine with
SYSTEM privileges. The second issue (CVE-2020-3433, with a CVSS score of 7.8)
could allow a logged-in user to copy arbitrary files to system-level directories
with SYSTEM privileges.



"In October 2022, the Cisco Product Security Incident Response Team became aware
of additional attempted exploitation of this vulnerability in the wild," Cisco
noted in the updated advisories.



The situation showcases the danger that older vulnerabilities continue to pose
to companies and individuals. LPE patches are often de-prioritized in the glut
of updates that businesses are faced with every month, but exploit chains often
combine a remote code execution (RCE) bug for initial access with an LPE exploit
for burrowing deeper into corporate networks and uncovering sensitive
information.

The US Cybersecurity and Infrastructure Security Agency (CISA) also this week
added the bugs to its Known Exploited Vulnerabilities (KEV) catalog, along with
four even older bugs in Cisco's Gigabyte gaming and graphics drivers
(CVE-2018-19320, CVE-2018-19321, CVE-2018-19322, CVE-2018-19323). Sophos flagged
exploitation of the latter earlier in the month by the BlackByte ransomware
gang.

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