What is CVE-2017-12871?

CVE-2017-12871 is a medium-severity vulnerability in Simplesamlphp, classified under Inadequate Encryption Strength. CVSS score: 5.9/10. Published 2017-09-01.

How severe is CVE-2017-12871?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Simplesamlphp

CVE-2017-12871

The aesEncrypt method in lib/SimpleSAML/Utils/Crypto.php in SimpleSAMLphp 1.14.x through 1.14.11 makes it easier for context-dependent attackers to bypass the encryption protection mechanism by leveraging use of the first 16 bytes of the secret key as the initialization vector (IV).

EPSS: 0.005 (39.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Simplesamlphp — versions 1.14.0, 1.14.1, 1.14.2
N/a — versions n/a

Weakness classification (CWE)

CWE-326 — Inadequate Encryption Strength

References

cve@mitre.org (x_refsource_CONFIRM, Patch, Third Party Advisory, Issue Tracking)
cve@mitre.org (x_refsource_CONFIRM, Patch, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2017-12871?: CVE-2017-12871 is a medium-severity vulnerability in Simplesamlphp, classified under Inadequate Encryption Strength. CVSS score: 5.9/10. Published 2017-09-01.
How severe is CVE-2017-12871?: Medium severity. CVSS v3 base score is 5.9 out of 10.