pypdf _data_structures.py __parse_content_stream infinite loop

CVSS Meta Temp Score
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CTI Interest Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in pypdf. Affected by this issue is the function __parse_content_stream of the file pypdf/generic/_data_structures.py. Such manipulation leads to infinite loop. This vulnerability is listed as CVE-2023-36464. The attack must be carried out locally. There is no available exploit. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in pypdf (the affected version unknown). Affected by this issue is the function __parse_content_stream of the file pypdf/generic/_data_structures.py. The manipulation with an unknown input leads to a infinite loop vulnerability. Using CWE to declare the problem leads to CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. Impacted is availability. CVE summarizes:

pypdf is an open source, pure-python PDF library. In affected versions an attacker may craft a PDF which leads to an infinite loop if `__parse_content_stream` is executed. That is, for example, the case if the user extracted text from such a PDF. This issue was introduced in pull request #969 and resolved in pull request #1828. Users are advised to upgrade. Users unable to upgrade may modify the line `while peek not in (b"\r", b"\n")` in `pypdf/generic/_data_structures.py` to `while peek not in (b"\r", b"\n", b"")`.

The weakness was presented 06/28/2023 as GHSA-4vvm-4w3v-6mr8. The advisory is shared for download at github.com. This vulnerability is handled as CVE-2023-36464 since 06/21/2023. There are known technical details, but no exploit is available.

Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 5.0

VulDB Base Score: 3.3
VulDB Temp Score: 3.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CNA Base Score: 6.2
CNA Vector (GitHub, Inc.): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Infinite loop
CWE: CWE-835 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

06/21/2023 🔍
06/28/2023 +7 days 🔍
06/28/2023 +0 days 🔍
07/20/2023 +22 days 🔍

Sourcesinfo

Advisory: GHSA-4vvm-4w3v-6mr8
Status: Confirmed

CVE: CVE-2023-36464 (🔍)
GCVE (CVE): GCVE-0-2023-36464
GCVE (VulDB): GCVE-100-232508

Entryinfo

Created: 06/28/2023 07:58
Updated: 07/20/2023 11:52
Changes: 06/28/2023 07:58 (50), 07/20/2023 11:52 (11)
Complete: 🔍
Cache ID: 216::103

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