CVE-2019-5977 — Mail header injection vulnerability in Cybozu Garoon 4

Mail header injection vulnerability in Cybozu Garoon 4.0.0 to 4.10.2 may allow a remote authenticated attackers to alter mail header via the application 'E-Mail'.

01What is this vulnerability?

Mail header injection vulnerability in Cybozu Garoon 4.0.0 to 4.10.2 may allow a remote authenticated attackers to alter mail header via the application 'E-Mail'.

02Affected products

Vendor	Product	Versions
Inc."	Cybozu Garoon	4.0.0 to 4.10.2

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2019-09-12T15:58:55.000Z
• Last modified: 2024-08-04T20:09:23.979Z

09References

• jvn.jp — http://jvn.jp/en/jp/JVN62618482/index.html
• kb.cybozu.support — https://kb.cybozu.support/article/35915