CVE-2020-7060: global buffer-overflow in mbfl_filt_conv_big5_wchar
Vulnerability summary
CVE-2020-7060 is a critical (CVSS 9.1) Out-of-bounds Read vulnerability in debian debian_linux. EPSS estimates a 8.89% chance of exploitation in the next 30 days, higher than 95.2% of scored vulnerabilities. 1 public exploit is recorded.
Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 12 · Related 6Timeline
- 10-02-2020PublishedVulnerability first disclosed.
- 17-09-2024Last modifiedVulnerability information updated.
Description
When using certain mbstring functions to convert multibyte encodings, in PHP versions 7.2.x below 7.2.27, 7.3.x below 7.3.14 and 7.4.x below 7.4.2 it is possible to supply data that will cause function mbfl_filt_conv_big5_wchar to read past the allocated buffer. This may lead to information disclosure or crash.
CVSS metrics
6 scores · 5 sources · 2 versions- CVE.orgCNA6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:LDiffers
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:LDiffers
- OSV · DebianEcosystem advisory · calculated9.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- OSV · AlpineEcosystem advisory · calculated9.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
EPSS trend
Probability
8.89%
Chance of exploitation in the next 30 days
Percentile
95%
Versus all other CVEs
30-day change
No change 0.00 pp
From 8.89% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (bugs.php.net)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu3 products
- php5< 5.5.9+dfsg-1ubuntu4.29+esm10
- php7.0< 7.0.33-0ubuntu0.16.04.11
- php7.2< 7.2.24-0ubuntu0.18.04.3
Debian2 products
- php7.4< 7.4.2-7
- debian_linuxEOL8.0
Alpine1 product
- php7< 7.3.14-r0 | < 7.2.27-r0
Opensuse1 product
- leapEOL15.1
Oracle1 product
- communications_diameter_signaling_router≥ 8.0, ≤ 8.4
Php1 product
- php≥ 7.2.0, < 7.2.27 | ≥ 7.3.0, < 7.3.14 | ≥ 7.4.0, < 7.4.2
Php group1 product
- php≥ 7.2.x, < 7.2.27 | ≥ 7.3.x, < 7.3.14 | ≥ 7.4.x, < 7.4.2
Tenable1 product
- tenable.sc< 5.19.0
8 vendors · 11 products
References
19 links
- lists.debian.org/debian-lts-announce/2020/02/msg00030.htmlMailing ListX Refsource MLISTThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-03/msg00023.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory