Summary
It was discovered that GnuTLS had a timing side-channel when handling
certain RSA-PSK key exchanges. A remote attacker could possibly use this
issue to recover sensitive information.
Fixed packages 2
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 20.04 LTS 20.04:LTS | gnutls28 | 3.6.13-2ubuntu1.9 |
| Ubuntu · 22.04 LTS 22.04:LTS | gnutls28 | 3.7.3-4ubuntu1.3 |
Vulnerabilities 1
-
Medium 5.9
Gnutls: timing side-channel in the rsa-psk authentication
A vulnerability was found that the response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ from response times of ciphertexts with correct PKCS#1 v1.5 padding.
References
-
report
https://ubuntu.com/security/CVE-2023-5981