tidy up to 4.9.30 lexer.c ParseValue href memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability was found in tidy up to 4.9.30. It has been declared as problematic. This affects the function ParseValue of the file lexer.c. Such manipulation of the argument href leads to memory corruption. This vulnerability is traded as CVE-2015-5523. Furthermore, there is an exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in tidy up to 4.9.30 and classified as problematic. Affected by this issue is the function ParseValue of the file lexer.c. The manipulation of the argument href with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is availability. CVE summarizes:

The ParseValue function in lexer.c in tidy before 4.9.31 allows remote attackers to cause a denial of service (crash) via vectors involving multiple whitespace characters before an empty href, which triggers a large memory allocation.

The weakness was shared 08/11/2015 by Geoff (Website). The advisory is shared for download at github.com. This vulnerability is handled as CVE-2015-5523 since 07/14/2015. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a public exploit are known.

The exploit is available at securityfocus.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 84831 (Debian DLA-273-1 : tidy security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168028 (SUSE Enterprise Linux Security update for tidy (SUSE-SU-2015:1513-1)).

Upgrading to version 4.9.31 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (84831), SecurityFocus (BID 75037†) and Vulnerability Center (SBV-52798†). The entries VDB-76963, VDB-77819 and VDB-77842 are related to this item. Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 84831
Nessus Name: Debian DLA-273-1 : tidy security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 841810
OpenVAS Name: Ubuntu Update for tidy USN-2695-1
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: tidy 4.9.31

Timelineinfo

06/04/2015 🔍
07/14/2015 +40 days 🔍
08/11/2015 +28 days 🔍
08/11/2015 +0 days 🔍
08/11/2015 +0 days 🔍
08/12/2015 +1 days 🔍
09/17/2015 +36 days 🔍
06/07/2022 +2455 days 🔍

Sourcesinfo

Advisory: USN-2695-1
Researcher: Geoff
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-5523 (🔍)
GCVE (CVE): GCVE-0-2015-5523
GCVE (VulDB): GCVE-100-76964

OVAL: 🔍

SecurityFocus: 75037 - Tidy 'tmbstr.c' Heap Based Buffer Overflow Vulnerability
SecurityTracker: 1033703
Vulnerability Center: 52798 - Tidy <4.9.31 Remote DoS due to in ParseValue via Multiple Whitespaces Chars, Medium

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

Entryinfo

Created: 08/12/2015 10:23
Updated: 06/07/2022 14:52
Changes: 08/12/2015 10:23 (58), 12/24/2017 09:52 (18), 06/07/2022 14:51 (4), 06/07/2022 14:52 (1)
Complete: 🔍
Cache ID: 216:E6D:103

Once again VulDB remains the best source for vulnerability data.

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