CVE-2023-52892: Name confusion in x509 Subject Alternative Name fields

Published Jun 27, 2024
·
Updated

In phpseclib before 1.0.22, 2.x before 2.0.46, and 3.x before 3.0.33, some characters in Subject Alternative Name fields in TLS certificates are incorrectly allowed to have a special meaning in regular expressions (such as a + wildcard), leading to name confusion in X.509 certificate host verification.

Other sources

Name confusion in x509 Subject Alternative Name fields

— Packagist

Affected Software

12 affected componentsFixes available
composer/phpseclib/phpseclib>=3.0.0<3.0.33
3.0.33
composer/phpseclib/phpseclib>=2.0.0<2.0.46
2.0.46
composer/phpseclib/phpseclib<1.0.22
1.0.22
phpseclib phpseclib>=1.0.0<1.0.22
phpseclib phpseclib>=2.0.0<2.0.46
phpseclib phpseclib>=3.0.0<3.0.33
debian/php-phpseclib
2.0.42-1+deb12u52.0.42-1+deb12u32.0.48-3+deb13u32.0.48-3+deb13u12.0.55-1
debian/php-phpseclib3
3.0.19-1+deb12u63.0.19-1+deb12u43.0.43-2+deb13u33.0.43-2+deb13u13.0.57-1
debian/phpseclib
1.0.20-1+deb12u51.0.20-1+deb12u31.0.23-6+deb13u31.0.23-6+deb13u11.0.30-1
composer/phpseclib/phpseclib>=3.0.0, <3.0.33
3.0.33
composer/phpseclib/phpseclib>=2.0.0, <2.0.46
2.0.46
composer/phpseclib/phpseclib<1.0.22
1.0.22

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade composer/phpseclib/phpseclib to a version that resolves this vulnerability.

    Fixed in 3.0.33
  2. Upgrade

    Upgrade composer/phpseclib/phpseclib to a version that resolves this vulnerability.

    Fixed in 2.0.46
  3. Upgrade

    Upgrade composer/phpseclib/phpseclib to a version that resolves this vulnerability.

    Fixed in 1.0.22
  4. Upgrade

    Upgrade debian/php-phpseclib to a version that resolves this vulnerability.

    Fixed in 2.0.42-1+deb12u5Fixed in 2.0.42-1+deb12u3Fixed in 2.0.48-3+deb13u3Fixed in 2.0.48-3+deb13u1Fixed in 2.0.55-1
  5. Upgrade

    Upgrade debian/php-phpseclib3 to a version that resolves this vulnerability.

    Fixed in 3.0.19-1+deb12u6Fixed in 3.0.19-1+deb12u4Fixed in 3.0.43-2+deb13u3Fixed in 3.0.43-2+deb13u1Fixed in 3.0.57-1
  6. Upgrade

    Upgrade debian/phpseclib to a version that resolves this vulnerability.

    Fixed in 1.0.20-1+deb12u5Fixed in 1.0.20-1+deb12u3Fixed in 1.0.23-6+deb13u3Fixed in 1.0.23-6+deb13u1Fixed in 1.0.30-1
  7. Upgrade

    Upgrade phpseclib to a version that resolves this vulnerability.

    Fixed in 1.0.22
  8. Upgrade

    Upgrade phpseclib to a version that resolves this vulnerability.

    Fixed in 2.0.46
  9. Upgrade

    Upgrade phpseclib to a version that resolves this vulnerability.

    Fixed in 3.0.33

Event History

Jun 27, 2024
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via NVD·10:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
Jun 28, 2024
Advisory Published
via GitHub·12:33 AM
Data Sourced
via GitHub·12:33 AM
DescriptionSeverityWeaknessAffected Software
Data Sourced
via Packagist·12:33 AM
DescriptionSeverityAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2023-52892?

CVE-2023-52892 has been classified as a moderate severity vulnerability affecting specific versions of phpseclib.

2

How do I fix CVE-2023-52892?

To remediate CVE-2023-52892, upgrade to phpseclib version 1.0.22, 2.0.46, or 3.0.33.

3

Which versions are affected by CVE-2023-52892?

CVE-2023-52892 affects phpseclib versions before 1.0.22, 2.x before 2.0.46, and 3.x before 3.0.33.

4

What problems does CVE-2023-52892 cause in TLS certificates?

CVE-2023-52892 allows certain characters in Subject Alternative Name fields of TLS certificates to be misinterpreted, leading to potential name confusion during X.509 certificate host verification.

5

Is CVE-2023-52892 related to regular expressions?

Yes, CVE-2023-52892 involves the incorrect handling of special characters in regular expressions within the Subject Alternative Name fields.

Company

Resources

Contact

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