SB2020081271 - Amazon Linux AMI update for libxml2
Published: August 12, 2020 Updated: April 12, 2023
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 7 secuirty vulnerabilities.
1) Resource management error (CVE-ID: CVE-2015-8035)
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
The xz_decomp function in xzlib.c in libxml2 2.9.1 does not properly detect compression errors, which allows context-dependent attackers to cause a denial of service (process hang) via crafted XML data.
2) Use-after-free (CVE-ID: CVE-2016-5131)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error when processing vectors related to the XPointer range-to function. A remote attackers can cause a denial of service or execute arbitrary code on the target system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
3) Use-after-free error (CVE-ID: CVE-2017-15412)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.The weakness exists due to use-after-free error in libXML. A remote attacker can trick the victim into visiting a specially crafted website, trigger memory corruption and execute arbitrary code with privileges of the current user.
Successful exploitation of the vulnerability may result in system compromise.
4) Memory corruption (CVE-ID: CVE-2017-18258)
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists in the xz_head() function of the GNOME libxml2 library, as defined in the xzlib.c source code due to boundary error in the Lempel-Ziv-Markov (LZMA) decompression feature. A remote unauthenticated attacker can trick the victim into opening a specially crafted LZMA file that submits malicious input, trigger memory corruption and cause the application to crash.
5) Null pointer dereference (CVE-ID: CVE-2018-14404)
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists in the xmlXPathCompOpEval() function, as defined in the path.c source code file due to improper parsing of invalid XPath expressions in the XPATH_OP_AND and XPATH_OP_OR cases. A remote attacker can send a specially crafted request that submits malicious input to an application that is using the affected library, trigger a NULL pointer dereference and cause the application to crash.
6) Infinite loop (CVE-ID: CVE-2018-14567)
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists in the liblzma error code of the GNOME libxml2 library due to an infinite loop condition in the Lempel–Ziv–Markov (LZMA) decompression feature during the processing of XML files. A remote attacker can trick the victim into opening an XML file that submits malicious input, trigger a LZMA_MEMLIMIT_ERROR condition and cause the service to crash.
7) Infinite loop (CVE-ID: CVE-2018-9251)
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists in the xz_decomp() function of the GNOME libxml2 library, as defined in the xzlib.c source code due to an infinite loop condition in the Lempel-Ziv-Markov (LZMA) decompression feature during the processing of XML files. A remote unauthenticated attacker can trick the victim into opening a specially crafted XML file that submits malicious input, trigger an LZMA_MEMLIMIT_ERROR condition and cause the application to crash.
Remediation
Install update from vendor's website.