CVE-2024-5991: Buffer overread in domain name matching
First published: Tue Aug 27 2024(Updated: )
In function MatchDomainName(), input param str is treated as a NULL terminated string despite being user provided and unchecked. Specifically, the function X509_check_host() takes in a pointer and length to check against, with no requirements that it be NULL terminated. If a caller was attempting to do a name check on a non-NULL terminated buffer, the code would read beyond the bounds of the input array until it found a NULL terminator.This issue affects wolfSSL: through 5.7.0.
Credit: facts@wolfssl.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| wolfSSL wolfMQTT | <=5.7.0 |
Remedy
Fixed in the following github pull request https://https://github.com/wolfSSL/wolfssl/pull/7604
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2024-5991?
The severity of CVE-2024-5991 is currently classified as high due to the potential for denial of service or security bypass.
How do I fix CVE-2024-5991?
To fix CVE-2024-5991, upgrade to a version of wolfSSL later than 5.7.0 that addresses this vulnerability.
What software is affected by CVE-2024-5991?
CVE-2024-5991 affects all versions of wolfSSL up to and including 5.7.0.
What vulnerability does CVE-2024-5991 describe?
CVE-2024-5991 describes a vulnerability in the MatchDomainName() function where unchecked user input is treated as a NULL terminated string.
Can CVE-2024-5991 lead to remote exploitation?
Yes, CVE-2024-5991 has the potential to be exploited remotely due to improper handling of user input.
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