Foo Labs Xpdf 4.00 PDF File Stream.cc DCTStream::readScan null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Foo Labs Xpdf 4.00. This issue affects the function DCTStream::readScan of the file Stream.cc of the component PDF File Handler. Performing a manipulation results in null pointer dereference. This vulnerability is known as CVE-2018-18457. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Foo Labs Xpdf 4.00 (Document Reader Software). It has been classified as problematic. This affects the function DCTStream::readScan of the file Stream.cc of the component PDF File Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. The summary by CVE is:

The function DCTStream::readScan in Stream.cc in Xpdf 4.00 allows remote attackers to cause a denial of service (NULL pointer dereference) via a crafted pdf file, as demonstrated by pdftoppm.

The bug was discovered 10/16/2018. The weakness was published 10/18/2018 (Website). The advisory is shared at forum.xpdfreader.com. This vulnerability is uniquely identified as CVE-2018-18457 since 10/18/2018. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 232043 (Linux Distros Unpatched Vulnerability : CVE-2018-18457), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (232043). Similar entries are available at VDB-125742, VDB-125743, VDB-125744 and VDB-125746. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.9
VulDB Meta Temp Score: 4.9

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 232043
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2018-18457

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/16/2018 🔍
10/18/2018 +1 days 🔍
10/18/2018 +0 days 🔍
10/18/2018 +0 days 🔍
10/18/2018 +0 days 🔍
03/07/2025 +2332 days 🔍

Sourcesinfo

Advisory: forum.xpdfreader.com
Status: Not defined

CVE: CVE-2018-18457 (🔍)
GCVE (CVE): GCVE-0-2018-18457
GCVE (VulDB): GCVE-100-125745
See also: 🔍

Entryinfo

Created: 10/18/2018 14:26
Updated: 03/07/2025 10:47
Changes: 10/18/2018 14:26 (45), 06/18/2020 06:37 (7), 05/30/2023 09:52 (13), 03/07/2025 10:47 (16)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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