HexChat 2.10.2 CAP LS Message common/inbound.c inbound_cap_ls memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability has been found in HexChat 2.10.2 and classified as critical. Affected by this vulnerability is the function inbound_cap_ls of the file common/inbound.c of the component CAP LS Message Handler. Performing a manipulation results in memory corruption. This vulnerability is cataloged as CVE-2016-2233. It is possible to initiate the attack remotely. Furthermore, there is an exploit available.

Detailsinfo

A vulnerability was found in HexChat 2.10.2 (Chat Software). It has been classified as critical. This affects the function inbound_cap_ls of the file common/inbound.c of the component CAP LS Message Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Stack-based buffer overflow in the inbound_cap_ls function in common/inbound.c in HexChat 2.10.2 allows remote IRC servers to cause a denial of service (crash) via a large number of options in a CAP LS message.

The bug was discovered 04/05/2016. The weakness was shared 01/18/2017 by PizzaHatHacker as EDB-ID 39657 as confirmed exploit (Exploit-DB). The advisory is shared at exploit-db.com. This vulnerability is uniquely identified as CVE-2016-2233 since 02/07/2016. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a public exploit are known.

A public exploit has been developed by PizzaHatHacker and been published even before and not after the advisory. The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 289 days. During that time the estimated underground price was around $0-$5k.

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 databases at Exploit-DB (39657) and SecurityFocus (BID 95920†). The entry VDB-95468 is related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 6.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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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
Author: PizzaHatHacker
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

02/07/2016 🔍
04/04/2016 +57 days 🔍
04/04/2016 +0 days 🔍
04/04/2016 +0 days 🔍
04/05/2016 +1 days 🔍
01/18/2017 +288 days 🔍
01/18/2017 +0 days 🔍
01/19/2017 +1 days 🔍
05/13/2026 +3401 days 🔍

Sourcesinfo

Advisory: EDB-ID 39657
Researcher: PizzaHatHacker
Status: Confirmed

CVE: CVE-2016-2233 (🔍)
GCVE (CVE): GCVE-0-2016-2233
GCVE (VulDB): GCVE-100-95469
SecurityFocus: 95920 - HexChat CVE-2016-2233 Stack-Based Buffer Overflow Vulnerability
OSVDB: - CVE-2016-2233 - HexChat - Buffer Overflow Issue

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

Entryinfo

Created: 01/19/2017 09:39
Updated: 05/13/2026 14:26
Changes: 01/19/2017 09:39 (70), 07/24/2020 12:59 (5), 12/27/2024 03:21 (16), 05/13/2026 14:26 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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