Out-of-Bounds Affecting wolfssl package, versions <4.1.0+dfsg-1
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Test your applications- Snyk ID SNYK-DEBIANUNSTABLE-WOLFSSL-347524
- published 23 May 2019
- disclosed 23 May 2019
Introduced: 23 May 2019
CVE-2019-11873 Open this link in a new tabHow to fix?
Upgrade Debian:unstable wolfssl to version 4.1.0+dfsg-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream wolfssl package and not the wolfssl package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
wolfSSL 4.0.0 has a Buffer Overflow in DoPreSharedKeys in tls13.c when a current identity size is greater than a client identity size. An attacker sends a crafted hello client packet over the network to a TLSv1.3 wolfSSL server. The length fields of the packet: record length, client hello length, total extensions length, PSK extension length, total identity length, and identity length contain their maximum value which is 2^16. The identity data field of the PSK extension of the packet contains the attack data, to be stored in the undefined memory (RAM) of the server. The size of the data is about 65 kB. Possibly the attacker can perform a remote code execution attack.
References
- https://security-tracker.debian.org/tracker/CVE-2019-11873
- https://www.telekom.com/en/corporate-responsibility/data-protection-data-security/security/details/advisories-504842
- https://www.telekom.com/resource/blob/572524/1c89c1cbaccdf792153063b3a10af10e/dl-190515-remote-buffer-overflow-vulnerability-wolfssl-library-data.pdf
- http://www.securityfocus.com/bid/108466