HOMEVULNERABILITIESCVE-2020-27618
MEDIUM

CVE-2020-27618

CWE-835Published: February 26, 2021· Updated: Jun 17, 2026

5.5
CVSS v3.1

Official Description

The iconv function in the GNU C Library (aka glibc or libc6) 2.32 and earlier, when processing invalid multi-byte input sequences in IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 encodings, fails to advance the input state, which could lead to an infinite loop in applications, resulting in a denial of service, a different vulnerability from CVE-2016-10228.

NVD Source

Technical Analysis

CVE-2020-27618 requires local access, meaning attackers must already have a foothold on the target system.

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 5.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected Vendors & Products

Debian1 product(s)
debian linux
gnu1 product(s)
glibc
netapp21 product(s)
ontap select deploy administration utilitya250 firmwarea250500f firmware500fh410c firmwareh410ch300s firmwareh300sh500s firmwareh500sh700s firmware+9
Oracle1 product(s)
communications cloud native core service communication proxy
Source: NVD CPE · 24 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
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://sourceware.org/bugzilla/show_bug.cgi?id=19519#c21
PATCHhttps://www.oracle.com/security-alerts/cpujan2022.html
PATCHhttps://sourceware.org/bugzilla/show_bug.cgi?id=19519#c21
PATCHhttps://www.oracle.com/security-alerts/cpujan2022.html
ADVISORYhttps://lists.debian.org/debian-lts-announce/2022/10/msg00021.html
ADVISORYhttps://security.gentoo.org/glsa/202107-07
ADVISORYhttps://security.netapp.com/advisory/ntap-20210401-0006/
ADVISORYhttps://sourceware.org/bugzilla/show_bug.cgi?id=26224
ADVISORYhttps://www.oracle.com/security-alerts/cpuapr2022.html
ADVISORYhttps://lists.debian.org/debian-lts-announce/2022/10/msg00021.html
ADVISORYhttps://security.gentoo.org/glsa/202107-07
ADVISORYhttps://security.netapp.com/advisory/ntap-20210401-0006/
ADVISORYhttps://sourceware.org/bugzilla/show_bug.cgi?id=26224
ADVISORYhttps://www.oracle.com/security-alerts/cpuapr2022.html

All References (14)

→
https://lists.debian.org/debian-lts-announce/2022/10/msg00021.htmlMailing List · Third Party Advisory
→
https://security.gentoo.org/glsa/202107-07Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20210401-0006/Third Party Advisory
→
https://sourceware.org/bugzilla/show_bug.cgi?id=19519#c21Issue Tracking · Patch · Third Party Advisory
→
https://sourceware.org/bugzilla/show_bug.cgi?id=26224Exploit · Issue Tracking · Third Party Advisory
→
https://www.oracle.com/security-alerts/cpuapr2022.htmlNot Applicable · Third Party Advisory
→
https://www.oracle.com/security-alerts/cpujan2022.htmlPatch · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2022/10/msg00021.htmlMailing List · Third Party Advisory
→
https://security.gentoo.org/glsa/202107-07Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20210401-0006/Third Party Advisory
→
https://sourceware.org/bugzilla/show_bug.cgi?id=19519#c21Issue Tracking · Patch · Third Party Advisory
→
https://sourceware.org/bugzilla/show_bug.cgi?id=26224Exploit · Issue Tracking · Third Party Advisory
→
https://www.oracle.com/security-alerts/cpuapr2022.htmlNot Applicable · Third Party Advisory
→
https://www.oracle.com/security-alerts/cpujan2022.htmlPatch · Third Party Advisory

Quick Facts

CVE IDCVE-2020-27618
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-835
CISA KEVNo
Affected4 vendor(s)
PublishedFeb 26, 2021

Related CVEs (CWE-835)

CVE-2018-20784
9.8
CVE-2017-12990
9.8
CVE-2017-12997
9.8
CVE-2017-12995
9.8
CVE-2021-42143
9.1
CVE-2024-43366
9.1

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2020-27618 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.
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