Resource exhaustion in NetApp Management Services For Element Software
CVE-2021-32675
Redis is an open source, in-memory database that persists on disk. When parsing an incoming Redis Standard Protocol (RESP) request, Redis allocates memory according to user-specified values which determine the number of elements (in the multi-bulk header) and size of each element (in the bulk header). An attacker delivering specially crafted requests over multiple connections can cause the server to allocate significant amount of memory. Because the same parsing mechanism is used to handle authentication requests, this vulnerability can also be exploited by unauthenticated users. The problem is fixed in Redis versions 6.2.6, 6.0.16 and 5.0.14. An additional workaround to mitigate this problem without patching the redis-server executable is to block access to prevent unauthenticated users from connecting to Redis. This can be done in different ways: Using network access control tools like firewalls, iptables, security groups, etc. or Enabling TLS and requiring users to authenticate using client side certificates.
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: 0.161 (96.9th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 96.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.161 · newest: 0.161 · change: 0.000
Affected products
- NetApp Management Services For Element Software
- NetApp Management Services For Hci
- Oracle Communications Operations Monitor — versions 4.3, 4.4, 5.0
- Redis — versions < 5.0.14, >= 6.0.0, < 6.0.16, >= 6.2.0, < 6.2.6
- Debian Linux — versions 10.0, 11.0
- Fedoraproject Fedora — versions 33, 34, 35
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/redis/redis/security/advisories/GHSA-f6pw-v9gw-v64p (Third Party Advisory)
- github.com/redis/redis/commit/5674b0057ff2903d43eaff802017eddf37c360f8 (Patch, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.apache.org/thread.html/ra603ff6e04549d7f290f61f9b11e2d2e4dba693b05ff053f4… (mailing-list)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- www.debian.org/security/2021/dsa-5001 (vendor-advisory, Third Party Advisory)
- www.oracle.com/security-alerts/cpuapr2022.html (Patch, Third Party Advisory)
- security.netapp.com/advisory/ntap-20211104-0003/ (Third Party Advisory)
- security.gentoo.org/glsa/202209-17 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-32675?
- CVE-2021-32675 is a high-severity vulnerability in NetApp Management Services For Element Software, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2021-10-04.
- How severe is CVE-2021-32675?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-32675 known to be exploited?
- 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.