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An issue was discovered in Rsyslog v8.1908.0. contrib...

High severity Unreviewed Published May 24, 2022 to the GitHub Advisory Database • Updated Jan 30, 2023

Package

No package listedSuggest a package

Affected versions

Unknown

Patched versions

Unknown

Description

An issue was discovered in Rsyslog v8.1908.0. contrib/pmaixforwardedfrom/pmaixforwardedfrom.c has a heap overflow in the parser for AIX log messages. The parser tries to locate a log message delimiter (in this case, a space or a colon) but fails to account for strings that do not satisfy this constraint. If the string does not match, then the variable lenMsg will reach the value zero and will skip the sanity check that detects invalid log messages. The message will then be considered valid, and the parser will eat up the nonexistent colon delimiter. In doing so, it will decrement lenMsg, a signed integer, whose value was zero and now becomes minus one. The following step in the parser is to shift left the contents of the message. To do this, it will call memmove with the right pointers to the target and destination strings, but the lenMsg will now be interpreted as a huge value, causing a heap overflow.

References

Published by the National Vulnerability Database Oct 7, 2019
Published to the GitHub Advisory Database May 24, 2022
Last updated Jan 30, 2023

Severity

High

EPSS score

0.721%
(80th percentile)

CVE ID

CVE-2019-17041

GHSA ID

GHSA-wvqp-mg76-5qw7

Source code

No known source code

Dependabot alerts are not supported on this advisory because it does not have a package from a supported ecosystem with an affected and fixed version.

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