Summary
Package updates are available for Amazon Linux 2023 that fix the following vulnerabilities: CVE-2026-13122: openvpn Server crash on reception of suitably malformed auth-token, if --auth-gen-token external-auth is active CVE-2026-12996: If the active TLS session has a pending dedicated ACK packet, tls_multi_process sets to_link to ks->ack_write_buf. If in the same execution of tls_multi_process, the initializing session reaches the authenticated stage, the active session will be freed which leaves to_link.data pointing to freed memory. CVE-2026-11771: An attacker controlling an HTTP proxy (or performing MITM on the plaintext pre-TLS proxy connection) can trigger a single 0-byte overrun to a buffer on the stack by sending a crafted NTLM Type 2 challenge response.
Fixed packages 4
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2023 | openvpn | 0:2.6.12-1.amzn2023.0.5 |
| Amazon Linux · 2023 | openvpn-debuginfo | 0:2.6.12-1.amzn2023.0.5 |
| Amazon Linux · 2023 | openvpn-debugsource | 0:2.6.12-1.amzn2023.0.5 |
| Amazon Linux · 2023 | openvpn-devel | 0:2.6.12-1.amzn2023.0.5 |
Vulnerabilities 3
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High 7.0
OpenVPN version 2.1.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows attackers via an off-by-one buffer write in th…
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Medium 6.0
A use-after-free in OpenVPN 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote authenticated peers to pote…
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Medium 5.9
OpenVPN version 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers to cause a denial of service …