CVE-2023-50262
"Dompdf Recursive SVG Document Chaining Vulnerability"
Description
Dompdf is an HTML to PDF converter for PHP. When parsing SVG images Dompdf performs an initial validation to ensure that paths within the SVG are allowed. One of the validations is that the SVG document does not reference itself. However, prior to version 2.0.4, a recursive chained using two or more SVG documents is not correctly validated. Depending on the system configuration and attack pattern this could exhaust the memory available to the executing process and/or to the server itself. php-svg-lib, when run in isolation, does not support SVG references for `image` elements. However, when used in combination with Dompdf, php-svg-lib will process SVG images referenced by an `image` element. Dompdf currently includes validation to prevent self-referential `image` references, but a chained reference is not checked. A malicious actor may thus trigger infinite recursion by chaining references between two or more SVG images. When Dompdf parses a malicious payload, it will crash due after exceeding the allowed execution time or memory usage. An attacker sending multiple request to a system can potentially cause resource exhaustion to the point that the system is unable to handle incoming request. Version 2.0.4 contains a fix for this issue.
INFO
Published Date :
Dec. 13, 2023, 9:15 p.m.
Last Modified :
Dec. 19, 2023, 3:28 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
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-2023-50262
.
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-2023-50262
vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-50262
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.
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CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Dec. 19, 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:N/A:H Changed Reference Type https://github.com/dompdf/dompdf/blob/v2.0.3/src/Image/Cache.php#L136-L153 No Types Assigned https://github.com/dompdf/dompdf/blob/v2.0.3/src/Image/Cache.php#L136-L153 Product Changed Reference Type https://github.com/dompdf/dompdf/commit/41cbac16f3cf56affa49f06e8dae66d0eac2b593 No Types Assigned https://github.com/dompdf/dompdf/commit/41cbac16f3cf56affa49f06e8dae66d0eac2b593 Patch Changed Reference Type https://github.com/dompdf/dompdf/security/advisories/GHSA-3qx2-6f78-w2j2 No Types Assigned https://github.com/dompdf/dompdf/security/advisories/GHSA-3qx2-6f78-w2j2 Exploit, Vendor Advisory Added CPE Configuration OR *cpe:2.3:a:dompdf_project:dompdf:*:*:*:*:*:*:*:* versions up to (including) 2.0.3 -
CVE Received by [email protected]
Dec. 13, 2023
Action Type Old Value New Value Added Description Dompdf is an HTML to PDF converter for PHP. When parsing SVG images Dompdf performs an initial validation to ensure that paths within the SVG are allowed. One of the validations is that the SVG document does not reference itself. However, prior to version 2.0.4, a recursive chained using two or more SVG documents is not correctly validated. Depending on the system configuration and attack pattern this could exhaust the memory available to the executing process and/or to the server itself. php-svg-lib, when run in isolation, does not support SVG references for `image` elements. However, when used in combination with Dompdf, php-svg-lib will process SVG images referenced by an `image` element. Dompdf currently includes validation to prevent self-referential `image` references, but a chained reference is not checked. A malicious actor may thus trigger infinite recursion by chaining references between two or more SVG images. When Dompdf parses a malicious payload, it will crash due after exceeding the allowed execution time or memory usage. An attacker sending multiple request to a system can potentially cause resource exhaustion to the point that the system is unable to handle incoming request. Version 2.0.4 contains a fix for this issue. Added Reference GitHub, Inc. https://github.com/dompdf/dompdf/security/advisories/GHSA-3qx2-6f78-w2j2 [No types assigned] Added Reference GitHub, Inc. https://github.com/dompdf/dompdf/commit/41cbac16f3cf56affa49f06e8dae66d0eac2b593 [No types assigned] Added Reference GitHub, Inc. https://github.com/dompdf/dompdf/blob/v2.0.3/src/Image/Cache.php#L136-L153 [No types assigned] Added CWE GitHub, Inc. CWE-20 Added CWE GitHub, Inc. CWE-674 Added CVSS V3.1 GitHub, Inc. AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-50262
is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-50262
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.06 }} 0.01%
score
0.24377
percentile