CVE-2019-12422 — Apache Shiro before 1

Apache Shiro before 1.4.2, when using the default "remember me" configuration, cookies could be susceptible to a padding attack.

01What is this vulnerability?

Apache Shiro before 1.4.2, when using the default "remember me" configuration, cookies could be susceptible to a padding attack.

02Affected products

Vendor	Product	Versions
Apache	Shiro	to 1.4.1

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: 2019-11-18T22:04:21.000Z
• Last modified: 2024-08-04T23:17:39.997Z

09References

• lists.apache.org — https://lists.apache.org/thread.html/c9db14cfebfb8e74205884ed2bf2e2b30790ce24b7d…
• lists.apache.org — https://lists.apache.org/thread.html/r2d2612c034ab21a3a19d2132d47d3e4aa70105008d…