SB2017092611 - Gentoo update for RAR, UnRAR
Published: September 26, 2017
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Integer overflow (CVE-ID: CVE-2012-6706)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to integer overflow when processing .rar archives in unrar 5.5.4. A remote unauthenticated attacker can create a specially crafted archive, trigger memory corruption and execute arbitrary code on the target system.
2) Out-of-bounds read (CVE-ID: CVE-2017-12940)
The vulnerability allows a remote attacker to crash the affected application.
The vulnerability exists due to out-pf-bounds read in libunrar.a in UnRAR before 5.5.7 in the EncodeFileName::Decode call within the Archive::ReadHeader15 function. A remote attacker can create a specially crafted archive and crash the affected application.
3) Out-of-bounds read (CVE-ID: CVE-2017-12941)
The vulnerability allows a remote attacker to crash the affected application.
The vulnerability exists due to out-of-bounds read in libunrar.a in UnRAR before 5.5.7 in the Unpack::Unpack20 function. A remote attacker can create a specially crafted archive and crash the affected application.
4) Buffer overflow (CVE-ID: CVE-2017-12942)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to boundary error when processing archives in in the Unpack::LongLZ function in libunrar.a in UnRAR before 5.5.7. A remote unauthenticated attacker can create a specially crafted archive, trick the victim into opening it an execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.