CVE-2021-327915.9MediumCWE-323

CVE-2021-32791: Hardcoded static IV and AAD with a reused key in AES GCM encryption in mod_auth_openidc

zmartzone · mod_auth_openidc

Fixed in 2.4.9 · Affected: zmartzone mod_auth_openidc before 2.4.9 · Exploitation: possible (1 to 10%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

1.5%probability of exploitation in the next 30 days

74th percentile

050100

Higher than 74% of scored CVEs

5.9MediumCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

mod_auth_openidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an OpenID Connect Relying Party, authenticating users against an OpenID Connect Provider. In mod_auth_openidc before version 2.4.9, the AES GCM encryption in mod_auth_openidc uses a static IV and AAD. It is important to fix because this creates a static nonce and since aes-gcm is a stream cipher, this can lead to known cryptographic issues, since the same key is being reused. From 2.4.9 onwards this has been patched to use dynamic values through usage of cjose AES encryption routines.

Affected products1

From the CVE record. A product or version that is not listed is unknown, not unaffected.

zmartzone · mod_auth_openidc< 2.4.9

On the Atlas

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Open the Atlas

Exploitation: Possible (1 to 10%). EPSS between 1% and 10%.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Reusing a Nonce, Key Pair in Encryption · Cryptography
Vendor: zmartzone
Published: July 2021
Band: Possible (1 to 10%), July 2021

CoverageNo articles yet

No CyberSIXT article names CVE-2021-32791 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.