Use of a Broken or Risky Cryptographic Algorithm Affecting python-twisted-web package, versions <0:12.1.0-5.el7_2


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating

    Threat Intelligence

    EPSS
    0.07% (32nd percentile)

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  • Snyk ID SNYK-RHEL7-PYTHONTWISTEDWEB-5364982
  • published 27 Mar 2023
  • disclosed 30 Mar 2012

How to fix?

Upgrade RHEL:7 python-twisted-web to version 0:12.1.0-5.el7_2 or higher.
This issue was patched in RHSA-2018:2927.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python-twisted-web package and not the python-twisted-web package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

The default BKS keystore use an HMAC that is only 16 bits long, which can allow an attacker to compromise the integrity of a BKS keystore. Bouncy Castle release 1.47 changes the BKS format to a format which uses a 160 bit HMAC instead. This applies to any BKS keystore generated prior to BC 1.47. For situations where people need to create the files for legacy reasons a specific keystore type "BKS-V1" was introduced in 1.49. It should be noted that the use of "BKS-V1" is discouraged by the library authors and should only be used where it is otherwise safe to do so, as in where the use of a 16 bit checksum for the file integrity check is not going to cause a security issue in itself.

CVSS Scores

version 3.1
Expand this section

NVD

4.4 medium
  • Attack Vector (AV)
    Local
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    Low
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    Low
  • Integrity (I)
    Low
  • Availability (A)
    None
Expand this section

Red Hat

5.1 medium