SB2023112605 - Gentoo update for Open vSwitch
Published: November 26, 2023
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 7 secuirty vulnerabilities.
1) Memory leak (CVE-ID: CVE-2020-27827)
The vulnerability allows a remote attacker to perform DoS attack on the target system.
The vulnerability exists due memory leak in lldpd when processing packets with multiple instances of certain TLVs. A remote attacker can send specially crafted traffic to the system and perform a denial of service (DoS) attack.
2) Input validation error (CVE-ID: CVE-2020-35498)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input when processing network packets. A remote attacker can send specially crafted traffic to the system and perform a denial of service (DoS) attack.
3) Memory leak (CVE-ID: CVE-2021-3905)
The vulnerability allows a remote attacker to perform DoS attack on the target system.
The vulnerability exists due memory leak in lib/ipf.c during userspace IP fragmentation processing. A remote attacker can send specially crafted packet fragments to the system to trigger memory leak and perform denial of service attack.
4) Use-after-free (CVE-ID: CVE-2021-36980)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error in decode_NXAST_RAW_ENCAP (called from ofpact_decode and ofpacts_decode) during the decoding of a RAW_ENCAP action. A remote attacker can send a specially crafted request to the system, trigger a use-after-free error and execute arbitrary code.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
5) Out-of-bounds read (CVE-ID: CVE-2022-4337)
The vulnerability allows a remote attacker to gain access to potentially sensitive information or perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary condition when parsing Auto Attach TLV. A remote attacker can send specially crafted LLDP messages to the affected system, trigger an out-of-bounds read error and read contents of memory on the system of perform a denial of service (DoS) attack.
6) Integer underflow (CVE-ID: CVE-2022-4338)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to integer underflow when parsing Auto Attach TLV. A remote attacker can send specially crafted LLDP messages to the affected system, trigger an integer underflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Note, by default interfaces are not configured to process LLDP messages.
7) Input validation error (CVE-ID: CVE-2023-1668)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input when processing IP packets. A remote attacker can send specially crafted IP packets with "ip proto" set to "0" and perform a denial of service (DoS) attack.
Successful exploitation of the vulnerability requires that flow rules contain 'set' actions on other fields in the IP protocol header.
Remediation
Install update from vendor's website.