Insufficient Entropy in Spring Security

CVE-2020-5408 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

Description

Spring Security versions 5.3.x prior to 5.3.2, 5.2.x prior to 5.2.4, 5.1.x prior to 5.1.10, 5.0.x prior to 5.0.16 and 4.2.x prior to 4.2.16 use a fixed null initialization vector with CBC Mode in the implementation of the queryable text encryptor. A malicious user with access to the data that has been encrypted using such an encryptor may be able to derive the unencrypted values using a dictionary attack.

Basic information

Type
reviewed
Severity
medium
Advisory on GitHub
Open advisory ↗
Repository advisory
—
Source code
Not specified
Published (advisory)
2020-06-15 19:34:31 UTC
Updated
2023-02-01 05:03:03 UTC
GitHub reviewed
2020-06-11 20:44:52 UTC
NVD published
2020-05-14

EPSS Score

Score Percentile
0.47% 64.52%

CVSS Scores

Base score Version Severity Vector
6.5 3.1 —
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.

Identifiers

Type Value
GHSA GHSA-2ppp-9496-p23q ↗
CVE CVE-2020-5408 ↗

CWEs

CWE id Name
CWE-329 Generation of Predictable IV with CBC Mode
CWE-330 Use of Insufficiently Random Values

Affected packages (5)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
maven org.springframework.security:spring-security-core >= 5.3.0, < 5.3.2 5.3.2 —
maven org.springframework.security:spring-security-core >= 5.2.0, < 5.2.4 5.2.4 —
maven org.springframework.security:spring-security-core >= 5.1.0, < 5.1.10 5.1.10 —
maven org.springframework.security:spring-security-core >= 5.0.0, < 5.0.16 5.0.16 —
maven org.springframework.security:spring-security-core < 4.2.16 4.2.16 —

References

cvelogic Threat Intelligence