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Debian Security Advisory 5555-1

Debian Linux Security Advisory 5555-1 - Two vulnerabilities were discovered in openvpn, a virtual private network application which could result in memory disclosure or denial of service.

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Debian Security Advisory DSA-5555-1 [email protected]
https://www.debian.org/security/ Moritz Muehlenhoff
November 15, 2023 https://www.debian.org/security/faq


Package : openvpn
CVE ID : CVE-2023-46849 CVE-2023-46850

Two vulnerabilities were discovered in openvpn, a virtual private
network application which could result in memory disclosure or denial
of service.

The oldstable distribution (bullseye) is not affected.

For the stable distribution (bookworm), these problems have been fixed in
version 2.6.3-1+deb12u2.

We recommend that you upgrade your openvpn packages.

For the detailed security status of openvpn please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/openvpn

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: [email protected]
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Ubuntu Security Notice 6484-1 - It was discovered that OpenVPN incorrectly handled the --fragment option in certain configurations. A remote attacker could possibly use this issue to cause OpenVPN to crash, resulting in a denial of service. It was discovered that OpenVPN incorrectly handled certain memory operations. A remote attacker could use this issue to cause OpenVPN to crash, obtain sensitive information, or possibly execute arbitrary code.

Ubuntu Security Notice USN-6484-1

Ubuntu Security Notice 6484-1 - It was discovered that OpenVPN incorrectly handled the --fragment option in certain configurations. A remote attacker could possibly use this issue to cause OpenVPN to crash, resulting in a denial of service. It was discovered that OpenVPN incorrectly handled certain memory operations. A remote attacker could use this issue to cause OpenVPN to crash, obtain sensitive information, or possibly execute arbitrary code.

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Using the --fragment option in certain configuration setups OpenVPN version 2.6.0 to 2.6.6 allows an attacker to trigger a divide by zero behaviour which could cause an application crash, leading to a denial of service.

CVE-2023-46850

Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending network buffers to a remote peer.

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