NULL pointer dereference in Apache HTTP Server
CVE-2021-34798
Malformed requests may cause the server to dereference a NULL pointer. This issue affects Apache HTTP Server 2.4.48 and earlier.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.645 (99.2th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.645 · newest: 0.645 · change: 0.000
Affected products
- Apache HTTP Server
- Apache Software Foundation HTTP Server — versions Apache HTTP Server 2.4
- Broadcom Brocade Fabric Operating System Firmware
- NetApp Cloud Backup
- NetApp Clustered Data Ontap
- NetApp Storagegrid
- Oracle Communications Cloud Native Core Network Function Environment — versions 1.10.0
- Oracle Enterprise Manager Base Platform — versions 13.4.0.0, 13.5.0.0
- Oracle HTTP Server — versions 12.2.1.3.0, 12.2.1.4.0
- Oracle Instantis Enterprisetrack — versions 17.1, 17.2, 17.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- httpd.apache.org/security/vulnerabilities_24.html (Release Notes, Vendor Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.apache.org/thread.html/r82838efc5fa6fc4c73986399c9b71573589f78b31846aff5b… (mailing-list)
- lists.apache.org/thread.html/r82c077663f9759c7df5a6656f925b3ee4f55fcd33c889ba7c… (mailing-list)
- lists.apache.org/thread.html/r3925e167d5eb1c75def3750c155d753064e1d34a143028bb3… (mailing-list)
- lists.apache.org/thread.html/r61fdbfc26ab170f4e6492ef3bd5197c20b862ce156e9d5a54… (mailing-list)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.debian.org/debian-lts-announce/2021/10/msg00001.html (mailing-list, Mailing List, Third Party Advisory)
- www.debian.org/security/2021/dsa-4982 (vendor-advisory, Third Party Advisory)
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-h… (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-34798?
- CVE-2021-34798 is a high-severity vulnerability in Apache HTTP Server, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2021-09-16.
- How severe is CVE-2021-34798?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-34798 known to be exploited?
- 17 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.