libxml2 20904-GITv2.9.4-16-g0741801 dict.c xmlDictComputeFastKey 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 classified as critical. Affected is the function xmlDictComputeFastKey of the file dict.c. Performing a manipulation results in memory corruption. This vulnerability was named CVE-2017-9049. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in libxml2 20904-GITv2.9.4-16-g0741801 (Document Processing Software). It has been classified as critical. This affects the function xmlDictComputeFastKey of the file dict.c. 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:

libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a heap-based buffer over-read in the xmlDictComputeFastKey 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 libxml2 Bug 759398.

The bug was discovered 05/15/2017. The weakness was presented 05/18/2017 (Website). It is possible to read the advisory at openwall.com. This vulnerability is uniquely identified as CVE-2017-9049 since 05/18/2017. 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 of the vulnerability are known, but there is no available exploit.

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 98601†). See VDB-87479, VDB-87518, VDB-101461 and VDB-101462 for similar entries. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Name

Version

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: 🔍
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: 🔍
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 🔍
05/19/2017 +1 days 🔍
06/08/2017 +20 days 🔍
06/09/2017 +1 days 🔍
12/18/2025 +3114 days 🔍

Sourcesinfo

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

CVE: CVE-2017-9049 (🔍)
GCVE (CVE): GCVE-0-2017-9049
GCVE (VulDB): GCVE-100-101463

OVAL: 🔍

SecurityFocus: 98601 - libxml2 CVE-2017-9049 Heap Buffer Overflow Vulnerability
OSVDB: - CVE-2017-9049 - xmlsoft - libxml2 - Buffer Over-Read Issue

See also: 🔍

Entryinfo

Created: 05/18/2017 16:40
Updated: 12/18/2025 16:32
Changes: 05/18/2017 16:40 (77), 09/30/2020 09:42 (6), 12/25/2020 06:37 (2), 12/18/2025 16:32 (16)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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