Graylog: Fortigate syslog message parser can be exploited to modify or delete fields from the original message
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| Graylog2 | graylog2-server | affected |
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| Graylog2 | Graylog2-server |
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| Source | ID | Title |
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Github GHSA |
GHSA-gqr6-r77p-c2pj | Fortigate syslog message parser can be exploited to modify or delete fields from the original message |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.633% probability within 30 days)
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| Metrics |
ssvc
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| Type | Values Removed | Values Added |
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| First Time appeared |
Graylog2
Graylog2 graylog2-server |
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| Vendors & Products |
Graylog2
Graylog2 graylog2-server |
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| Description | Graylog is a free and open log management platform. Prior to Graylog Server versions 6.3.12, 7.0.7, and 7.1.2 and Graylog Forwarder version 7.3, the FortiGate key-value syslog parser in graylog2-server/src/main/java/org/graylog2/inputs/codecs/GLFortiGateSyslogEvent.java and graylog2-server/src/main/java/org/graylog2/inputs/codecs/SyslogCodec.java mishandles field-like text inside quoted values. GLFortiGateSyslogEvent.getFields() uses KV_PATTERN and QUOTED_KV_PATTERN, while SyslogCodec.parse() invokes the FortiGateSyslogEvent parser; crafted values containing = or backslash-escaped quotes can cause embedded keys such as srcip, dstip, date, time, and tz to remove or overwrite original top-level fields or produce an invalid message that Graylog discards. An unauthenticated network sender who can submit syslog messages can therefore manipulate security-log fields or evade logging to obscure malicious activity. This issue is fixed in Graylog Server versions 6.3.12, 7.0.7, and 7.1.2 and Graylog Forwarder version 7.3. | |
| Title | Graylog: Fortigate syslog message parser can be exploited to modify or delete fields from the original message | |
| Weaknesses | CWE-138 | |
| References |
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| Metrics |
cvssV3_1
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