CVE-2017-12871
SimpleSAMLphp Incorrect IV generation for encryption
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).
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- High
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
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).
- Record
CVE-2017-12871- CVSS 3.0
- 5.9 Medium
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 4.3 Medium
AV:N/AC:M/Au:N/C:P/I:N/A:N - Weakness
- CWE-326
- Updated
- 2026-11-02
CVE List No score
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).
- Record
CVE-2017-12871- Updated
- 2026-11-02
EUVDEUVD-2022-5649 No score
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).
- Record
EUVD-2022-5649- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-ww3w-592j-5qrw
SimpleSAMLphp Incorrect IV generation for encryption
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).
- Record
GHSA-ww3w-592j-5qrw- CVSS 3.0
- 5.9 Medium
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-326
- Updated
- 2026-11-02
OSV
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).
- Record
CVE-2017-12871- CVSS 3.0
- 5.9 Medium
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVDEBIAN-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).
- Record
DEBIAN-CVE-2017-12871- CVSS 3.0
- 5.9 Medium
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVGHSA-ww3w-592j-5qrw
SimpleSAMLphp Incorrect IV generation for encryption
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).
- Record
GHSA-ww3w-592j-5qrw- CVSS 3.0
- 5.9 Medium
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-326
- Updated
- 2026-11-02
OSVUBUNTU-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).
- Record
UBUNTU-CVE-2017-12871- CVSS 3.0
- 5.9 Medium
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
simplesamlphp/simplesamlphpPackagist |
1.14.0 up to 1.14.12 | 1.14.12 |
simplesamlphpDebian:12 |
before 1.14.15-1 | 1.14.15-1 |
simplesamlphpDebian:14 |
before 1.14.15-1, plus listed versions 1.10.0-11.11.0-11.12.0-11.12.0~rc1-11.12.0~rc2-1 Show 33 moreShow less1.13.0-11.13.1-11.13.1-21.13.2-11.14.0-11.14.1-11.14.10-11.14.11-11.14.2-11.14.2-21.14.3-11.14.4-11.14.5-11.14.6-11.14.7-11.14.8-11.14.9-11.6.0-11.6.1-11.6.2-11.6.3-11.6.3-21.6.3-31.7.0-11.7.0-21.8.0-11.8.1-11.8.2-11.9.0-11.9.0~rc1-11.9.0~rc2-11.9.1-11.9.2-1 |
1.14.15-1 |
simplesamlphp/simplesamlphpPackagist |
1.14.0 up to 1.14.12, plus listed versions v1.14.0v1.14.1v1.14.10v1.14.11v1.14.2 Show 7 moreShow lessv1.14.3v1.14.4v1.14.5v1.14.6v1.14.7v1.14.8v1.14.9 |
1.14.12 |
simplesamlphpUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 1.13.2-11.14.0-11.14.0-1ubuntu21.14.0-1ubuntu2+esm1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2017-12871 is a medium vulnerability (CVSS 5.9) in Simplesamlphp, published September 1, 2017. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.49%, the 42nd percentile. Fixed in simplesamlphp/simplesamlphp 1.14.12.
References
simplesamlphp.org/security/201703-02
github.com/simplesamlphp/simplesamlphp/commit/77df6a932d46daa35e364925eb73a175010dc904
nvd.nist.gov/vuln/detail/CVE-2017-12871