Heap Overflow Vulnerability in Rsyslog Affects Cisco Log Message Parsing
CVE-2019-17042

9.8CRITICAL

Key Information:

Vendor

Rsyslog

Status
Rsyslog
Vendor
CVE Published:
7 October 2019

What is CVE-2019-17042?

A vulnerability in Rsyslog's processing of Cisco log messages allows for a heap overflow condition. The parser erroneously processes log message delimiters, leading to potential exploitation. When the log message fails to meet expected delimiters, it improperly initializes a variable, causing it to decrement into negative values. This can lead to undefined behaviors during memory operations, posing significant risks to system stability and security.

References

https://github.com/rsyslog/rsyslog/blob/v8-stable/ChangeLog
x_refsource_CONFIRM
https://github.com/rsyslog/rsyslog/pull/3883
x_refsource_CONFIRM
http://lists.opensuse.org/opensuse-security-announce/2019...
vendor-advisoryx_refsource_SUSE

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.