SB2020033011 - Gentoo update for libxls
Published: March 30, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 7 secuirty vulnerabilities.
1) Integer overflow (CVE-ID: CVE-2017-12110)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.The weakness exists in the xls_appendSST function due to integer overflow. A remote attacker can send a specially crafted .xls file, trick the victim into opening it, trigger memory corruption and execute arbitrary code with privileges of the current user.
Successful exploitation of the vulnerability may result in system compromise.
2) Out-of-bounds write (CVE-ID: CVE-2017-12111)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.The weakness exists in the xls_addCell function due to out-of-bounds write. A remote attacker can send a specially crafted .xls file, trick the victim into opening it, trigger memory corruption and execute arbitrary code with privileges of the current user.
Successful exploitation of the vulnerability may result in system compromise.
3) Out-of-bounds write (CVE-ID: CVE-2017-2896)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.The weakness exists in the xls_mergedCells function of libxls due to out-of-bounds write. A remote attacker can send a specially crafted .xls file, trick the victim into opening it, trigger memory corruption and execute arbitrary code with privileges of the current user.
Successful exploitation of the vulnerability may result in system compromise.
4) Out-of-bounds write (CVE-ID: CVE-2017-2897)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.The weakness exists in the read_MSAT function of libxls due to out-of-bounds write. A remote attacker can send a specially crafted .xls file, trick the victim into opening it, trigger memory corruption and execute arbitrary code with privileges of the current user.
Successful exploitation of the vulnerability may result in system compromise.
5) Stack-based buffer overflow (CVE-ID: CVE-2017-2919)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.The weakness exists in the xls_getfcell function due to stack-based buffer overflow. A remote attacker can send a specially crafted .xls file, trick the victim into opening it, trigger memory corruption and execute arbitrary code with privileges of the current user.
Successful exploitation of the vulnerability may result in system compromise.
6) Double-free error (CVE-ID: CVE-2018-20450)
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists due to insufficient validation of user-supplied input in the read_MSAT function in ole.c. A remote attacker can submit a specially crafted Excel file, trigger double-free error and cause the service to crash.
7) Memory corruption (CVE-ID: CVE-2018-20452)
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists due to inconsistent memory management (new versus free) in ole2_read_header in ole.c. A remote attacker can submit a specially crafted Excel file, trigger an invalid free in the read_MSAT_body function in ole.c and cause the service to crash.
Remediation
Install update from vendor's website.