What’s Vulnerable › Vulnerabilities

CVE-2024-47619: tranport: TLS host name wildcard matching too lax

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-05-07 · updated 2026-06-17
• Weakness: CWE-295

Description

syslog-ng is an enhanced log daemo. Prior to version 4.8.2, `tls_wildcard_match()` matches on certificates such as `foo.*.bar` although that is not allowed. It is also possible to pass partial wildcards such as `foo.a*c.bar` which glib matches but should be avoided / invalidated. This issue could have an impact on TLS connections, such as in man-in-the-middle situations. Version 4.8.2 contains a fix for the issue.

Affected products

• Debian Linux: 11.0
• OneIdentity Syslog-Ng: before 4.8.2 — fixed in 4.8.2

How to fix

Upgrade to a fixed version: OneIdentity Syslog-Ng 4.8.2. Check the vendor advisory for mitigations.

References

• https://github.com/syslog-ng/syslog-ng/blob/b0ccc8952d333fbc2d97e51fddc0b569a15e7a7d/lib/transport/tls-verifier.c#L78-L110
• https://github.com/syslog-ng/syslog-ng/commit/dadfdbecde5bfe710b0a6ee5699f96926b3f9006
• https://github.com/syslog-ng/syslog-ng/releases/tag/syslog-ng-4.8.2
• https://github.com/syslog-ng/syslog-ng/security/advisories/GHSA-xr54-gx74-fghg
• https://lists.debian.org/debian-lts-announce/2025/05/msg00034.html
• https://github.com/syslog-ng/syslog-ng/security/advisories/GHSA-xr54-gx74-fghg

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