Debian Bug report logs -
#942065
rsyslog: CVE-2019-17042
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Bug#942065
; Package src:rsyslog
.
(Wed, 09 Oct 2019 19:09:04 GMT) (full text, mbox, link).
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to Salvatore Bonaccorso <carnil@debian.org>
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New Bug report received and forwarded. Copy sent to carnil@debian.org, team@security.debian.org, team@security.debian.org, Michael Biebl <biebl@debian.org>
.
(Wed, 09 Oct 2019 19:09:04 GMT) (full text, mbox, link).
Message #5 received at submit@bugs.debian.org (full text, mbox, reply):
Source: rsyslog
Version: 8.1908.0-1
Severity: normal
Tags: security upstream
Forwarded: https://github.com/rsyslog/rsyslog/pull/3883
Hi,
The following vulnerability was published for rsyslog, filling this
for tracking mainly.
CVE-2019-17042[0]:
| An issue was discovered in Rsyslog v8.1908.0.
| contrib/pmcisconames/pmcisconames.c has a heap overflow in the parser
| for Cisco 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.
If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.
For further information see:
[0] https://security-tracker.debian.org/tracker/CVE-2019-17042
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-17042
[1] https://github.com/rsyslog/rsyslog/pull/3883
Please adjust the affected versions in the BTS as needed.
Regards,
Salvatore
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