MEDIUM
CVE-2020-29562
CWE-617Published: December 4, 2020· Updated: Jun 17, 2026
4.8
CVSS v3.1
Official Description
The iconv function in the GNU C Library (aka glibc or libc6) 2.30 to 2.32, when converting UCS4 text containing an irreversible character, fails an assertion in the code path and aborts the program, potentially resulting in a denial of service.
Technical Analysis
CVE-2020-29562 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 4.8.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.Low
User InteractionRequired
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H
Affected Vendors & Products
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
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (10)
→
https://security.gentoo.org/glsa/202101-20Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20210122-0004/Third Party Advisory
→
https://sourceware.org/bugzilla/show_bug.cgi?id=26923Exploit · Issue Tracking · Patch · Third Party Advisory
→
https://security.gentoo.org/glsa/202101-20Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20210122-0004/Third Party Advisory
→
https://sourceware.org/bugzilla/show_bug.cgi?id=26923Exploit · Issue Tracking · Patch · Third Party Advisory
Quick Facts
CVE IDCVE-2020-29562
CVSS Score4.8 / 10
SeverityMEDIUM
WeaknessCWE-617
CISA KEVNo
Affected3 vendor(s)
PublishedDec 4, 2020
Related CVEs (CWE-617)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2020-29562 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. CVE data is provided under the NVD usage policy.