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CVE-2017-12872

21
FAUCET Score

CVE-2017-12872 describes a timing side-channel vulnerability in SimpleSAMLphp versions 1.14.11 and earlier, specifically impacting the Htpasswd authentication source and SimpleSAML_Session class. This flaw allows remote attackers to deduce secret information by observing timing differences during comparisons of user-supplied data against sensitive material. With a CVSSv3 score of 5.9 (Medium), exploitation requires high attack complexity but can lead to high confidentiality impact without requiring user interaction or privileges. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.14.11CPE matchmatch criteria
cpe:2.3:a:simplesamlphp:simplesamlphp:*:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.45%
Probability of exploitation in next 30 days
EPSS Percentile
70.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0145 is in the 42nd percentile among its peer group of 19,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

composerpatch availablevia ghsa
Product: simplesamlphp/simplesamlphpFixed in: 1.15.0-rc1

Vendor Advisories (1)

composerGHSA-v882-949x-6v28medium

SimpleSAMLphp allows timing side-channel attacks

May 14, 2022

References

lists.debian.org / debian-lts-announce/2017/12/msg00007.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2018/06/msg00017.html
Mailing ListThird Party Advisory
simplesamlphp.org / security/201703-01
PatchVendor Advisory