libxml2 20904-GITv2.9.4-16-g0741801 dict.c xmlDictAddString memory corruption

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

Summaryinfo

A vulnerability was found in libxml2 20904-GITv2.9.4-16-g0741801. It has been declared as critical. Affected by this vulnerability is the function xmlDictAddString of the file dict.c. Executing a manipulation can lead to memory corruption. The identification of this vulnerability is CVE-2017-9050. The attack may be launched remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in libxml2 20904-GITv2.9.4-16-g0741801 (Document Processing Software). It has been declared as critical. This vulnerability affects the function xmlDictAddString of the file dict.c. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a heap-based buffer over-read in the xmlDictAddString function in dict.c. This vulnerability causes programs that use libxml2, such as PHP, to crash. This vulnerability exists because of an incomplete fix for CVE-2016-1839.

The bug was discovered 05/15/2017. The weakness was shared 05/18/2017 (Website). The advisory is shared for download at openwall.com. This vulnerability was named CVE-2017-9050 since 05/18/2017. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful 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 3 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 100708 (openSUSE Security Update : libxml2 (openSUSE-2017-663)), 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 170014 (SUSE Enterprise Linux Security Update for libxml2 (SUSE-SU-2017:1454-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (100708) and SecurityFocus (BID 98568†). The entries VDB-87479, VDB-87518, VDB-101461 and VDB-101462 are related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Name

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License

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

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
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: 100708
Nessus Name: openSUSE Security Update : libxml2 (openSUSE-2017-663)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 53375
OpenVAS Name: Debian Security Advisory DSA 3952-1 (libxml2 - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Timelineinfo

05/15/2017 🔍
05/18/2017 +3 days 🔍
05/18/2017 +0 days 🔍
05/18/2017 +0 days 🔍
05/18/2017 +0 days 🔍
05/18/2017 +0 days 🔍
06/08/2017 +21 days 🔍
06/09/2017 +1 days 🔍
12/18/2025 +3113 days 🔍

Sourcesinfo

Advisory: openwall.com
Researcher: Marcel B, ouml, hme
Status: Confirmed

CVE: CVE-2017-9050 (🔍)
GCVE (CVE): GCVE-0-2017-9050
GCVE (VulDB): GCVE-100-101464

OVAL: 🔍

SecurityFocus: 98568 - libxml2 CVE-2017-9050 Incomplete Fix Local Heap Based Buffer Overflow Vulnerability
OSVDB: - CVE-2017-9050 - libxml2 - Buffer Over-Read Issue

See also: 🔍

Entryinfo

Created: 05/18/2017 16:40
Updated: 12/18/2025 00:23
Changes: 05/18/2017 16:40 (77), 09/30/2020 09:45 (6), 12/25/2020 06:40 (2), 12/18/2025 00:23 (16)
Complete: 🔍
Cache ID: 216:901:103

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