SB2020031844 - Red Hat Enterprise Linux 7 Extras update for slirp4netns
Published: March 18, 2020
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Heap-based buffer overflow (CVE-ID: CVE-2019-14378)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the ip_reass() function in ip_input.c in libslirp. A remote authenticated attacker can send a large packet, trigger heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
2) Use-after-free (CVE-ID: CVE-2019-15890)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists in "ip_reass()" routine in "ip_input.c" file while reassembling incoming packets, if the first fragment is bigger than the m->m_dat[] buffer. A remote attacker can send a specially crafted packet and cause the application to crash.
3) Heap-based buffer overflow (CVE-ID: CVE-2020-7039)
The vulnerability allows an attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within the tcp_emu() function in tcp_subr.c in libslirp. An attacker can issue specially crafted IRC DCC commands in EMU_IRC, trigger heap-based buffer overflow and execute arbitrary code on the target system.
4) Buffer overflow (CVE-ID: CVE-2020-8608)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within tcp_subr.c file in libslirp. A local user can pass specially crafted data to the application that is using the affected version of library, trigger memory corruption and execute arbitrary code on the system.
Remediation
Install update from vendor's website.