CVE-2018-20712

Exp

A heap-based buffer over-read exists in the function d_expression_1 in cp-demangle.c in GNU libiberty, as distributed in GNU Binutils 2.31.1. A crafted input can cause segmentation faults, leading to denial-of-service, as demonstrated by c++filt.

Published: 2019-01-14 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-20712 is rated High Exploit Risk (72.7/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.66%). 2 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +2.41% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2018-20712

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-20712

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.25% 2.66% +2.41%
2 2026-05-22 0.67% 0.25% -0.42%
3 2026-04-14 — 0.67% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-20712

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.0 MEDIUM
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 3.6 [email protected]
4.3 2.0 MEDIUM
AV:N/AC:M/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 2.9 [email protected]

Weakness enumeration for CVE-2018-20712

OS Trackers for CVE-2018-20712

vendor priority summary link
alpine medium CVE-2018-20712: 1 source package rows (binutils); 10 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 10, open 0. https://security.alpinelinux.org/vuln/CVE-2018-20712
debian unimportant CVE-2018-20712 unimportant priority: Debian including 1 source packages (binutils), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 5. https://security-tracker.debian.org/tracker/CVE-2018-20712
redhat medium — https://access.redhat.com/security/cve/CVE-2018-20712
suse low CVE-2018-20712 severity low: SUSE including 6 source package names (binutils, binutils-devel, binutils-devel-32bit, binutils-gold, libctf-nobfd0, libctf0), 161 product×package rows across 64 product lines (HPE Helion OpenStack 8, Magnum Orchestration 7, … (64 product lines)): Known Not Affected 161. https://www.suse.com/security/cve/CVE-2018-20712/
ubuntu low CVE-2018-20712 low priority: Ubuntu including 1 source packages (libiberty), 19 status rows across 19 suites (bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 13, ignored 3, DNE 1, deferred 1, needs-triage 1. https://ubuntu.com/security/CVE-2018-20712

Affected software / configurations for CVE-2018-20712

Vendor Product Version Raw CPE
gnu binutils 2.31.1 cpe:2.3:a:gnu:binutils:2.31.1:*:*:*:*:*:*:*

References for CVE-2018-20712

URL Tags
http://www.securityfocus.com/bid/106563 Third Party Advisory VDB Entry
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88629 Exploit Issue Tracking Third Party Advisory
https://sourceware.org/bugzilla/show_bug.cgi?id=24043 Exploit Issue Tracking Third Party Advisory
https://support.f5.com/csp/article/K38336243 Third Party Advisory
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