CVE-2019-0195 — Manipulating classpath asset file URLs, an attacker could guess the path to a kn

Manipulating classpath asset file URLs, an attacker could guess the path to a known file in the classpath and have it downloaded. If the attacker found the file with the value of the tapestry.hmac-passphrase configuration symbol, most probably the webapp's AppModule class, t

01What is this vulnerability?

Manipulating classpath asset file URLs, an attacker could guess the path to a known file in the classpath and have it downloaded. If the attacker found the file with the value of the tapestry.hmac-passphrase configuration symbol, most probably the webapp's AppModule class, the value of this symbol could be used to craft a Java deserialization attack, thus running malicious injected Java code. The…

02Affected products

Vendor	Product	Versions
n	a / Apache Tapestry	Apache Tapestry 5.4.0 to 5.4.3

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: 2019-09-16T15:37:37.000Z
• Last modified: 2024-08-04T17:44:15.351Z

09References

• lists.apache.org — https://lists.apache.org/thread.html/5173c4eed06e2fca6fd5576ed723ff6bb1711738ec5…
• lists.apache.org — https://lists.apache.org/thread.html/a4092cb3bacb143571024e79c0016c039b6c982423d…
• lists.apache.org — https://lists.apache.org/thread.html/6c40c1e03d2131119f9b77882431a0050f02bf9cae9…
• lists.apache.org — https://lists.apache.org/thread.html/r87523dd07886223aa086edc25fe9b8ddb9c1090f7d…
• lists.apache.org — https://lists.apache.org/thread.html/r7d9c54beb1dc97dcccc58d9b5d31f0f7166f9a25ad…
• lists.apache.org — https://lists.apache.org/thread.html/r237ff7f286bda31682c254550c1ebf92b0ec61329b…
• www.openwall.com — http://www.openwall.com/lists/oss-security/2021/04/15/1