Information Leak in OpenWrt’s ustream-ssl Library Affects Multiple Versions
CVE-2019-5102

4MEDIUM

Key Information:

Vendor

Openwrt

Status
Openwrt
Vendor
CVE Published:
18 November 2019

What is CVE-2019-5102?

The ustream-ssl library within OpenWrt versions 18.06.4 and 15.05.1 has a significant information leak vulnerability. When a client connects to a remote server, the SSL certificate validation process is initiated, but improper handling of invalid certificates leaves the system vulnerable. An attacker can exploit this flaw through a man-in-the-middle attack, introducing a rogue SSL certificate that tricks the victim into sending sensitive data unencrypted, compromising the confidentiality of the transmitted information during the initial request.

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Deploy the Patch

Affected Version(s)

OpenWRT OpenWrt 15.05.1, via wget (busybox)

OpenWRT OpenWrt 18.06.4, via wget (uclient-fetch)

References

https://talosintelligence.com/vulnerability_reports/TALOS...

CVSS V3.1

Score:
4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Discovered by Claudio Bozzato of Cisco Talos.
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