MEDIUM
CVE-2021-33294
CWE-835Published: July 18, 2023· Updated: Jun 17, 2026
5.5
CVSS v3.1
Official Description
In elfutils 0.183, an infinite loop was found in the function handle_symtab in readelf.c .Which allows attackers to cause a denial of service (infinite loop) via crafted file.
Technical Analysis
CVE-2021-33294 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.None
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Affected Vendors & Products
elfutils_project1 product(s)
elfutils
Source: NVD CPE · 1 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories
All References (4)
→
https://sourceware.org/bugzilla/show_bug.cgi?id=27501Exploit · Issue Tracking
→
https://sourceware.org/pipermail/elfutils-devel/2021q1/003607.htmlMailing List · Patch
→
https://sourceware.org/bugzilla/show_bug.cgi?id=27501Exploit · Issue Tracking
→
https://sourceware.org/pipermail/elfutils-devel/2021q1/003607.htmlMailing List · Patch
Quick Facts
CVE IDCVE-2021-33294
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-835
CISA KEVNo
Affected1 vendor(s)
PublishedJul 18, 2023
Related CVEs (CWE-835)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-33294 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.