CVE-2020-7061 | heap-buffer-overflow in phar_extract_file

Exp

In PHP versions 7.3.x below 7.3.15 and 7.4.x below 7.4.3, while extracting PHAR files on Windows using phar extension, certain content inside PHAR file could lead to one-byte read past the allocated buffer. This could potentially lead to information disclosure or crash.

Published: 2020-02-27 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-7061 is rated High Exploit Risk (71.8/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 3.09%). 1 public exploit reference(s) are indexed (Exploit-DB). 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-2020-7061

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

Exploit prediction scoring system (EPSS) score for CVE-2020-7061

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 2026-05-28 2.77% 3.09% +0.32%
2 2026-03-25 2.06% 2.77% +0.71%
3 2026-03-04 — 2.06% —

Full EPSS history (46 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-7061

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.5 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L 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:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 2.5 [email protected]
9.1 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big 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.
 3.9 5.2 [email protected]
6.4 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 4.9 [email protected]

Weakness enumeration for CVE-2020-7061

OS Trackers for CVE-2020-7061

vendor priority summary link
alpine critical CVE-2020-7061: 1 source package rows (php7); 1 state rows across 1 repos (edge-community); fixed 1, open 0. https://security.alpinelinux.org/vuln/CVE-2020-7061
debian unimportant CVE-2020-7061 unimportant priority: Debian including 1 source packages (php7.4), 1 status rows across 1 suites (bullseye): resolved 1. https://security-tracker.debian.org/tracker/CVE-2020-7061
gentoo high CVE-2020-7061: 1 GLSA(s) (202003-57), 1 atom(s) (dev-lang/php); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2020-7061
redhat low — https://access.redhat.com/security/cve/CVE-2020-7061
ubuntu low CVE-2020-7061 low priority: Ubuntu including 5 source packages (php5, php7.0, php7.2, php7.3, php7.4), 25 status rows across 5 suites (bionic, eoan, trusty, upstream, xenial): DNE 16, not-affected 4, needs-triage 3, released 2. https://ubuntu.com/security/CVE-2020-7061

Affected software / configurations for CVE-2020-7061

Vendor Product Version Raw CPE
php php >= 7.2.0, <= 7.2.27 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php >= 7.3.0, <= 7.3.14 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
php php >= 7.4.0, <= 7.4.2 cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
tenable tenable.sc < 5.19.0 cpe:2.3:a:tenable:tenable.sc:*:*:*:*:*:*:*:*

References for CVE-2020-7061

URL Tags
https://bugs.php.net/bug.php?id=79171 Exploit Vendor Advisory
https://security.gentoo.org/glsa/202003-57 Third Party Advisory
https://www.tenable.com/security/tns-2021-14 Patch Third Party Advisory
cvelogic Threat Intelligence