Buffer overflow in Apache Http_server
CVE-2021-39275
ap_escape_quotes() may write beyond the end of a buffer when given malicious input. No included modules pass untrusted data to these functions, but third-party / external modules may. This issue affects Apache HTTP Server 2.4.48 and earlie…
Vulnerability class: Buffer Overflow
EPSS: 0.363 (98.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Apache Http_server
- Apache Software Foundation Http Server — versions Apache HTTP Server 2.4
- Netapp Cloud_backup
- Netapp Clustered_data_ontap
- Netapp Storagegrid
- Oracle Http_server — versions 12.2.1.3.0, 12.2.1.4.0
- Oracle Instantis_enterprisetrack — versions 17.1, 17.2, 17.3
- Oracle Zfs_storage_appliance_kit — versions 8.8
- Siemens Sinec_nms
- Siemens Sinema_server — versions 14.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@apache.org (x_refsource_MISC, Release Notes, Vendor Advisory)
- security@apache.org (x_refsource_FEDORA, vendor-advisory, Third Party Advisory)
- security@apache.org (mailing-list, x_refsource_MLIST, Patch)
- security@apache.org (mailing-list, x_refsource_MLIST, Patch)
- security@apache.org (mailing-list, x_refsource_MLIST, Patch)
- security@apache.org (mailing-list, x_refsource_MLIST, Patch)
- security@apache.org (x_refsource_FEDORA, vendor-advisory, Third Party Advisory)
- security@apache.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- security@apache.org (vendor-advisory, Third Party Advisory, x_refsource_DEBIAN)
- security@apache.org (x_refsource_CISCO, vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-39275?
- CVE-2021-39275 is a critical-severity vulnerability in Apache Http_server, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2021-09-16.
- How severe is CVE-2021-39275?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-39275 known to be exploited?
- 17 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.