CVE-2021-27577 json
Incorrect handling of url fragment leads to cache poisoning
published 5y ago modified 4mo ago also EUVD-2021-14326
- cvss
- 7.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.4%
- EPSS 3.4% chance of exploitation in 30 days, percentile 89%
- public exploits
- 0
- none known
Summary
Incorrect handling of url fragment vulnerability of Apache Traffic Server allows an attacker to poison the cache. This issue affects Apache Traffic Server 7.0.0 to 7.1.12, 8.0.0 to 8.1.1, 9.0.0 to 9.0.1.
Patch / fix
- trafficserver Debian 12 8.1.1+ds-1.1
debian advisories DEBIAN-CVE-2021-27577
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Check with FencerExploit prediction
3.45% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:P/A:N |
Affected products
- Apache Software Foundation Apache Traffic Server
Classification
- Weakness
-
- CWE-444 Inconsistent Interpretation of HTTP Requests
References
-
debian.org
/security/2021/dsa-4957
vendor-advisory, third-party-advisory
-
lists.apache.org
/thread.html/ra1a41ff92a70d25bf576d7da2590575e8ff430393a3f4a0c34de4277%40%3Cusers.trafficserver.apache.org%3E
mailing-list, vendor-advisory
Sources
- CVE List CVE-2021-27577
- NVD CVE-2021-27577
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