OpenSLP 2.0.0 xlsp_xmalloc.c xrealloc null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in OpenSLP 2.0.0. This vulnerability affects the function xrealloc of the file xlsp_xmalloc.c. Such manipulation leads to null pointer dereference. This vulnerability is listed as CVE-2016-4912. The attack may be performed from remote. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as critical, has been found in OpenSLP 2.0.0. Affected by this issue is the function xrealloc of the file xlsp_xmalloc.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. CVE summarizes:

The _xrealloc function in xlsp_xmalloc.c in OpenSLP 2.0.0 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a large number of crafted packets, which triggers a memory allocation failure.

The bug was discovered 05/23/2016. The weakness was presented 03/27/2017 (oss-sec). The advisory is shared for download at openwall.com. This vulnerability is handled as CVE-2016-4912 since 05/18/2016. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 164 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 94531 (openSUSE Security Update : openslp (openSUSE-2016-1262)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 170686 (SUSE Enterprise Linux Security Update for openslp (SUSE-SU-2018:0100-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (94531). See VDB-95857 for similar entry. 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: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
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: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 94531
Nessus Name: openSUSE Security Update : openslp (openSUSE-2016-1262)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 870458
OpenVAS Name: Fedora Update for openslp FEDORA-2016-d9dbd6d339
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/18/2016 🔍
05/23/2016 +5 days 🔍
11/03/2016 +164 days 🔍
11/04/2016 +1 days 🔍
03/27/2017 +143 days 🔍
03/27/2017 +0 days 🔍
03/28/2017 +1 days 🔍
11/22/2022 +2065 days 🔍

Sourcesinfo

Advisory: openwall.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-4912 (🔍)
GCVE (CVE): GCVE-0-2016-4912
GCVE (VulDB): GCVE-100-98948
OSVDB: - CVE-2016-4912 - OpenSLP - Denial of Service Issue
SecurityTracker: 1035916

See also: 🔍

Entryinfo

Created: 03/28/2017 22:09
Updated: 11/22/2022 14:35
Changes: 03/28/2017 22:09 (71), 08/23/2020 11:33 (4), 11/22/2022 14:35 (4)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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