7.5
HIGH
CVE-2023-49087
Xml-security Canonicalization Information Forgery Vulnerability
Description

xml-security is a library that implements XML signatures and encryption. Validation of an XML signature requires verification that the hash value of the related XML-document matches a specific DigestValue-value, but also that the cryptographic signature on the SignedInfo-tree (the one that contains the DigestValue) verifies and matches a trusted public key. If an attacker somehow (i.e. by exploiting a bug in PHP's canonicalization function) manages to manipulate the canonicalized version's DigestValue, it would be possible to forge the signature. This issue has been patched in version 1.6.12 and 5.0.0-alpha.13.

INFO

Published Date :

Nov. 30, 2023, 6:15 a.m.

Last Modified :

Dec. 6, 2023, 5:49 p.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Affected Products

The following products are affected by CVE-2023-49087 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Simplesamlphp saml2
2 Simplesamlphp xml-security
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2023-49087.

URL Resource
https://github.com/simplesamlphp/xml-security/commit/f509e3083dd7870cce5880c804b5122317287581 Patch
https://github.com/simplesamlphp/xml-security/security/advisories/GHSA-ww7x-3gxh-qm6r Exploit Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-49087 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2023-49087 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Initial Analysis by [email protected]

    Dec. 06, 2023

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
    Changed Reference Type https://github.com/simplesamlphp/xml-security/commit/f509e3083dd7870cce5880c804b5122317287581 No Types Assigned https://github.com/simplesamlphp/xml-security/commit/f509e3083dd7870cce5880c804b5122317287581 Patch
    Changed Reference Type https://github.com/simplesamlphp/xml-security/security/advisories/GHSA-ww7x-3gxh-qm6r No Types Assigned https://github.com/simplesamlphp/xml-security/security/advisories/GHSA-ww7x-3gxh-qm6r Exploit, Vendor Advisory
    Added CPE Configuration OR *cpe:2.3:a:simplesamlphp:saml2:5.0.0:alpha12:*:*:*:*:*:* *cpe:2.3:a:simplesamlphp:xml-security:1.6.11:*:*:*:*:*:*:*
  • CVE Received by [email protected]

    Nov. 30, 2023

    Action Type Old Value New Value
    Added Description xml-security is a library that implements XML signatures and encryption. Validation of an XML signature requires verification that the hash value of the related XML-document matches a specific DigestValue-value, but also that the cryptographic signature on the SignedInfo-tree (the one that contains the DigestValue) verifies and matches a trusted public key. If an attacker somehow (i.e. by exploiting a bug in PHP's canonicalization function) manages to manipulate the canonicalized version's DigestValue, it would be possible to forge the signature. This issue has been patched in version 1.6.12 and 5.0.0-alpha.13.
    Added Reference GitHub, Inc. https://github.com/simplesamlphp/xml-security/security/advisories/GHSA-ww7x-3gxh-qm6r [No types assigned]
    Added Reference GitHub, Inc. https://github.com/simplesamlphp/xml-security/commit/f509e3083dd7870cce5880c804b5122317287581 [No types assigned]
    Added CWE GitHub, Inc. CWE-345
    Added CVSS V3.1 GitHub, Inc. AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-49087 is associated with the following CWEs:

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.05 }} 0.01%

score

0.22836

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability