CVE-2020-17527
Description
While investigating bug 64830 it was discovered that Apache Tomcat 10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8.5.0 to 8.5.59 could re-use an HTTP request header value from the previous stream received on an HTTP/2 connection for the request associated with the subsequent stream. While this would most likely lead to an error and the closure of the HTTP/2 connection, it is possible that information could leak between requests.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Arch Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Fixed | 9.0.40-1 |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 9.0.40-1 |
| sid | Fixed | 9.0.40-1 |
| forky | Fixed | 9.0.40-1 |
| bullseye | Fixed | 9.0.40-1 |
| bookworm | Fixed | 9.0.40-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Maven | org.apache.tomcat:tomcat-coyote | >=10.0.0-M1,<10.0.0-M10 | 10.0.0-M10 |
| Maven | org.apache.tomcat:tomcat-coyote | >=9.0.0-M1,<9.0.40 | 9.0.40 |
| Maven | org.apache.tomcat:tomcat-coyote | >=8.5.0,<8.5.60 | 8.5.60 |
References
- https://security.archlinux.org/ASA-202012-3
- https://www.suse.com/security/cve/CVE-2020-17527.html
- https://nvd.nist.gov/vuln/detail/CVE-2020-17527
- https://github.com/apache/tomcat/commit/21e3408671aac7e0d7e264e720cac8b1b189eb29
- https://github.com/apache/tomcat/commit/8d2fe6894d6e258a6d615d7f786acca80e6020cb
- https://github.com/apache/tomcat/commit/d56293f816d6dc9e2b47107f208fa9e95db58c65
- https://lists.apache.org/thread.html/rce5ac9a40173651d540babce59f6f3825f12c6d4e886ba00823b11e5@%3Cannounce.apache.org%3E
- https://lists.apache.org/thread.html/rce5ac9a40173651d540babce59f6f3825f12c6d4e886ba00823b11e5@%3Cannounce.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/rd5babd13d7a350b369b2f647b4dd32ce678af42f9aba5389df1ae6ca@%3Cusers.tomcat.apache.org%3E
- https://lists.debian.org/debian-lts-announce/2020/12/msg00022.html
- https://security.gentoo.org/glsa/202012-23
- https://security.netapp.com/advisory/ntap-20201210-0003
- https://tomcat.apache.org/security-10.html
- https://tomcat.apache.org/security-8.html
- https://tomcat.apache.org/security-9.html
- https://www.debian.org/security/2021/dsa-4835
- https://www.oracle.com//security-alerts/cpujul2021.html
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpujan2022.html
- https://lists.apache.org/thread.html/rce5ac9a40173651d540babce59f6f3825f12c6d4e886ba00823b11e5%40%3Cannounce.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/rca833c6d42b7b9ce1563488c0929f29fcc95947d86e5e740258c8937@%3Cdev.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/rbba08c4dcef3603e36276d49adda8eedbe458c5104314b4038f697e1@%3Cusers.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/rabbe6b3ae6a9795641d7a05c00d2378d5bbbe4240b7e20f09b092cce@%3Cissues.guacamole.apache.org%3E
- https://lists.apache.org/thread.html/raa0e9ad388c1e6fd1e301b5e080f9439f64cb4178119a86a4801cc53@%3Cdev.tomcat.apache.org%3E
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.