CVE-2013-4177: The Google Authenticator login module 6.x-1.x before 6.x-1.2 and 7.x-1.x before 7.x-1.4 for Drupal does not pr

Routine

MEDIUM 5.0DOWNGRADE

CVE-2013-4177 is a medium-severity flaw (CVSS 5.0) affecting ga login. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Google Authenticator login module 6.x-1.x before 6.x-1.2 and 7.x-1.x before 7.x-1.4 for Drupal does not properly identify user account names, which might allow remote attackers to bypass the two-factor authentication requirement via unspecified vectors.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.4% (top 27%)
CISA exploited list	No
Weakness	CWE-264
Published	2014-05-29
Last modified	2026-06-16

Publisher (CNA): Red Hat, Inc. · Vendor: google authenticator login project

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2014-05-29 14:19 UTCPublished CVE record published
2026-06-16 23:56 UTCUpdated Record last modified

google authenticator login project ga login DOWNGRADE

Affected: 6.x-1.0 alpha1 · 6.x-1.0 beta1 · 6.x-1.0 beta2 · 6.x-1.1 · 6.x-1.x dev · 7.x-1.0 · 7.x-1.0 beta1 · 7.x-1.0 dev

Fixed in: no fixed release known

Safe to downgrade to: a release before 6.x-1.0

1. Check installed version

apt-cache policy ga-login || rpm -q ga-login || ga-login --version

2. No fixed release: DOWNGRADE to a release before 6.x-1.0 (Debian / Ubuntu)

apt-cache madison ga-login sudo apt install ga-login=<VERSION_BEFORE_6.x-1.0> sudo apt-mark hold ga-login

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list ga-login sudo dnf downgrade ga-login-<VERSION_BEFORE_6.x-1.0> sudo dnf versionlock add ga-login

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2013-4177?

ga login: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2013-4177 being exploited?

CVE-2013-4177 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2013-4177 affect?

CVE-2013-4177 affects ga login. Severity is medium (CVSS 5.0). The Google Authenticator login module 6.x-1.x before 6.x-1.2 and 7.x-1.x before 7.x-1.4 for Drupal does not properly identify user account names, which might allow remote attackers to bypass the two-factor authentication requirement via uns

How urgent is CVE-2013-4177?

Priority 36/100. No elevated risk signals yet.

Software pages

Drupal vulnerabilities

Related CVEs

CVE-2013-4178 MEDIUM 5.0 DOWNGRADE The Google Authenticator login module 6.x-1.x before 6.x-1.2 and 7.x-1.x before 7.x-1.4 for Drupal allows remo
CVE-2013-0258 MEDIUM 6.8 DOWNGRADE The Google Authenticator login (ga_login) module 7.x before 7.x-1.3 for Drupal, when multi-factor authenticati

References

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