Frank Denis Pure-FTPd 1.0.21 Command ftpd.c doreply LIST Command null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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6.8$0-$5k0.00

A vulnerability classified as critical was found in Frank Denis Pure-FTPd 1.0.21 (File Transfer Software). This vulnerability affects the function doreply of the file ftpd.c of the component Command Handler. The manipulation with the input value aaa[...] leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was published 08/13/2012 by kingcope as 20479 as confirmed exploit (Website). The advisory is available at exploit-db.com. The vendor was not involved in the coordination of the public release. The attack can be initiated remotely. A single authentication is necessary for exploitation. Technical details and also a public exploit are known.

A public exploit has been developed by kingcope (kingcope) in Perl and been published immediately after the advisory. It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $25k-$100k.

Upgrading to version 1.0.36 eliminates this vulnerability. The upgrade is hosted for download at download.pureftpd.org.

The vulnerability is also documented in the vulnerability database at Exploit-DB (20479).

Productinfo

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Version

CPE 2.3info

CPE 2.2info

CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 6.8

VulDB Base Score: 7.6
VulDB Temp Score: 6.8
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CVSSv2info

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Exploitinginfo

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

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Author: kingcope (kingcope)
Programming Language: 🔍
Download: 🔍
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Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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Upgrade: Pure-FTPd 1.0.36

Timelineinfo

08/13/2012 🔍
08/13/2012 +0 days 🔍
08/13/2012 +0 days 🔍
09/13/2012 +31 days 🔍
09/19/2012 +6 days 🔍
05/01/2018 +2050 days 🔍

Sourcesinfo

Advisory: 20479
Researcher: kingcope
Status: Confirmed
OSVDB: 85447

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/19/2012 13:53
Updated: 05/01/2018 11:13
Changes: 09/19/2012 13:53 (60), 05/01/2018 11:13 (1)
Complete: 🔍

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