CVE-2021-42550
medium
CVSS v3
—
CVSS v4 NEW
—
VIR risk
5.5
Description
Deserialization of Untrusted Data in logback
Predictions
Exploit likelihood
30%
Patch ETA
—
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
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rocky | 8 | fixed | |
| debian | bookworm | fixed | 1:1.2.8-1 |
| debian | bullseye | affected | |
| debian | forky | fixed | 1:1.2.8-1 |
| debian | sid | fixed | 1:1.2.8-1 |
| debian | trixie | fixed | 1:1.2.8-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Maven | ch.qos.logback:logback-core | <1.2.9 | 1.2.9 |
References
- https://errata.rockylinux.org/RLSA-2022:5498
- https://nvd.nist.gov/vuln/detail/CVE-2021-42550
- https://github.com/qos-ch/logback/commit/87291079a1de9369ac67e20dc70a8fdc7cc4359c
- https://github.com/qos-ch/logback/commit/ef4fc4186b74b45ce80d86833820106ff27edd42
- https://cert-portal.siemens.com/productcert/pdf/ssa-371761.pdf
- https://github.com/cn-panda/logbackRceDemo
- https://github.com/qos-ch/logback
- https://github.com/qos-ch/logback/blob/1502cba4c1dfd135b2e715bc0cf80c0045d4d128/logback-site/src/site/pages/news.html
- https://jira.qos.ch/browse/LOGBACK-1591
- https://security.netapp.com/advisory/ntap-20211229-0001
- http://logback.qos.ch/news.html
- http://packetstormsecurity.com/files/167794/Open-Xchange-App-Suite-7.10.x-Cross-Site-Scripting-Command-Injection.html
- http://seclists.org/fulldisclosure/2022/Jul/11
- https://security-tracker.debian.org/tracker/CVE-2021-42550
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.