SB2018112703 - Gentoo update for Libav
Published: November 27, 2018
Security Bulletin ID
SB2018112703
Severity
High
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Out-of-bounds read (CVE-ID: CVE-2017-16803)
The vulnerability allows a remote attacker to cause DoS condition on the target system.The weakness exists in the smacker_decode_tree function in libavcodec/smacker.c due to improper restrictions of tree recursion. A remote attacker can supply specially crafted Smacker stream, trigger bitstream.c:build_table() out-of-bounds read and cause the application to crash.
2) Heap-based buffer overflow (CVE-ID: CVE-2017-7862)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to heap-based buffer overflow related to the decode_frame function in libavcodec/pictordec.c. A remote unauthenticated attacker can supply specially crafted input, trigger out-of-bounds write and execute arbitrary code with elevated privileges.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install update from vendor's website.