CVE-2024-0553

HIGH
Published Jan 16, 2024 Modified Mar 24, 2026 CWE-203

Description

A vulnerability was found in GnuTLS. The response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ from the response times of ciphertexts with correct PKCS#1 v1.5 padding. This issue may allow a remote attacker to perform a timing side-channel attack in the RSA-PSK key exchange, potentially leading to the leakage of sensitive data. CVE-2024-0553 is designated as an incomplete resolution for CVE-2023-5981.

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CVSS v3.1 Score

7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness Type (CWE)

CWE-203 CWE-203

Affected Products

Vendor Product
gnu gnutls
fedoraproject fedora
redhat enterprise_linux
redhat enterprise_linux

References

Frequently Asked Questions

What is CVE-2024-0553? +
A vulnerability was found in GnuTLS. The response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ from the response times of ciphertexts with correct PKCS#1 v1.5 padding. This issue may allow a remote attacker to perform a timing side-channel attack in the RSA-PSK key exchange, potentially leading to the leakage of sensitive data. CVE-2024-0553 is designated as an incomplete resolution for CVE-2023-5981. It has a CVSS v3.1 base score of 7.5 (HIGH).
How severe is CVE-2024-0553? +
CVE-2024-0553 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2024-0553? +
CVE-2024-0553 affects products from fedoraproject, gnu, redhat, specifically: enterprise_linux, fedora, gnutls. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-0553? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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