CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
4.6 | $0-$5k | 0.00 |
A vulnerability, which was classified as critical, has been found in Xmlsoft libxml2 2.9.2 (Document Processing Software). This issue affects some unknown processing of the component Encoding Conversion Handler. The manipulation 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 integrity. The summary by CVE is:
Heap-based buffer overflow in the xmlParseXmlDecl function in parser.c in libxml2 before 2.9.3 allows context-dependent attackers to cause a denial of service via unspecified vectors related to extracting errors after an encoding conversion failure.
The weakness was disclosed 11/25/2015 (Website). The advisory is shared at git.gnome.org. The identification of this vulnerability is CVE-2015-7498 since 09/29/2015. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available.
The vulnerability scanner Nessus provides a plugin with the ID 87354 (Amazon Linux AMI : libxml2 (ALAS-2015-628)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 351588 (Amazon Linux Security Advisory for libxml2: ALAS2-2019-1220).
Upgrading to version 2.9.3 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 X-Force (108321) and Tenable (87354). The entries 77250, 79257, 79258 and 79334 are pretty similar.
Product
Type
Vendor
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 5.3VulDB Meta Temp Score: 4.6
VulDB Base Score: 5.3
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv2
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Memory corruptionCWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍
Local: No
Remote: Yes
Availability: 🔍
Status: Unproven
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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Nessus ID: 87354
Nessus Name: Amazon Linux AMI : libxml2 (ALAS-2015-628)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
OpenVAS ID: 703430
OpenVAS Name: Debian Security Advisory DSA 3430-1 (libxml2 - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Upgrade: libxml2 2.9.3
Patch: git.gnome.org
Timeline
09/29/2015 🔍11/25/2015 🔍
11/25/2015 🔍
11/26/2015 🔍
12/08/2015 🔍
12/14/2015 🔍
12/15/2015 🔍
12/15/2015 🔍
06/28/2022 🔍
Sources
Advisory: USN-2834-1Status: Confirmed
Confirmation: 🔍
CVE: CVE-2015-7498 (🔍)
OVAL: 🔍
X-Force: 108321 - Libxml2 encoding conversion failures unspecified
SecurityTracker: 1034243
Vulnerability Center: 54851 - Libxml2 Remote DoS due to Buffer Overflow in XmlParseXmlDecl, Medium
SecurityFocus: 79548
See also: 🔍
Entry
Created: 11/26/2015 11:49Updated: 06/28/2022 07:57
Changes: 11/26/2015 11:49 (68), 05/11/2018 13:08 (10), 06/28/2022 07:52 (5), 06/28/2022 07:57 (1)
Complete: 🔍
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