Summary
Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2023-5388: It was discovered that the numerical library used in NSS for RSA cryptography leaks information whether high order bits of the RSA decryption result are zero. This information can be used to mount a Bleichenbacher or Manger like attack against all RSA decryption operations. As the leak happens before any padding operations, it affects all padding modes: PKCS#1 v1.5, OAEP, and RSASVP. Both API level calls and TLS server operation are affected.
Fixed packages 5
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2 | nss-softokn | 0:3.90.0-6.amzn2.0.1 |
| Amazon Linux · 2 | nss-softokn-debuginfo | 0:3.90.0-6.amzn2.0.1 |
| Amazon Linux · 2 | nss-softokn-devel | 0:3.90.0-6.amzn2.0.1 |
| Amazon Linux · 2 | nss-softokn-freebl | 0:3.90.0-6.amzn2.0.1 |
| Amazon Linux · 2 | nss-softokn-freebl-devel | 0:3.90.0-6.amzn2.0.1 |
Vulnerabilities 1
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Medium 6.5
NSS was susceptible to a timing side-channel attack when performing RSA decryption. This attack could potentially allow…
References
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web
https://alas.aws.amazon.com/cve/html/CVE-2023-5388.html