CVE-2019-6977: Buffer Overflow

Published Dec 9, 2018
·
Updated

Fixed bug (imagecolormatch Out Of Bounds Write on Heap). (CVE-2019-6977)

Other sources

gdImageColorMatch in gdcolormatch.c in the GD Graphics Library (aka LibGD) 2.2.5, as used in the imagecolormatch function in PHP before 5.6.40, 7.x before 7.1.26, 7.2.x before 7.2.14, and 7.3.x before 7.3.1, has a heap-based buffer overflow. This can be exploited by an attacker who is able to trigger imagecolormatch calls with crafted image data.

Affected Software

42 affected componentsFixes available
redhat/gd<0:2.2.5-7.el8
0:2.2.5-7.el8
redhat/rh-php71-php<0:7.1.30-1.el7
0:7.1.30-1.el7
redhat/rh-php72-php<0:7.2.24-1.el7
0:7.2.24-1.el7
debian/libgd2<=2.2.4-2, <=2.2.4-2+deb9u3, <=2.2.5-5
2.2.5-5.12.2.4-2+deb9u4
redhat/php<5.6.40
5.6.40
redhat/php<7.1.26
7.1.26
redhat/php<7.2.14
7.2.14
redhat/php<7.3.1
7.3.1
PHP PHP<7.1.26
7.1.26
Libgd Libgd=2.2.5
PHP PHP<5.6.40
PHP PHP>=7.0.0<7.1.26
PHP PHP>=7.2.0<7.2.14
PHP PHP=7.3.0
Debian Debian Linux=8.0
Debian Debian Linux=9.0
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=18.10
NetApp Storage Automation Store
debian/libgd2
2.3.0-22.3.0-2+deb11u12.3.3-92.3.3-13
alpine/gd<2.2.5-r2
2.2.5-r2
alpine/gd<2.2.5-r2
2.2.5-r2
alpine/gd<2.2.5-r2
2.2.5-r2
alpine/gd<2.2.5-r2
2.2.5-r2
alpine/gd<2.2.5-r2
2.2.5-r2
alpine/gd<2.2.5-r2
2.2.5-r2
alpine/gd<2.2.5-r2
2.2.5-r2
alpine/gd<2.2.5-r2
2.2.5-r2
alpine/gd<2.2.5-r2
2.2.5-r2
alpine/gd<2.2.5-r2
2.2.5-r2
alpine/gd<2.2.5-r2
2.2.5-r2
alpine/gd<2.2.5-r2
2.2.5-r2
alpine/gd<2.2.5-r2
2.2.5-r2
alpine/gd<2.2.5-r2
2.2.5-r2
alpine/gd<2.2.5-r2
2.2.5-r2
alpine/gd<2.2.5-r2
2.2.5-r2
alpine/gd<2.2.5-r2
2.2.5-r2
alpine/gd<2.2.5-r2
2.2.5-r2
alpine/gd<2.2.5-r2
2.2.5-r2
alpine/php7<7.1.29-r0
7.1.29-r0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/gd to a version that resolves this vulnerability.

    Fixed in 0:2.2.5-7.el8
  2. Upgrade

    Upgrade redhat/rh-php71-php to a version that resolves this vulnerability.

    Fixed in 0:7.1.30-1.el7
  3. Upgrade

    Upgrade redhat/rh-php72-php to a version that resolves this vulnerability.

    Fixed in 0:7.2.24-1.el7
  4. Upgrade

    Upgrade debian/libgd2 to a version that resolves this vulnerability.

    Fixed in 2.2.5-5.1Fixed in 2.2.4-2+deb9u4
  5. Upgrade

    Upgrade redhat/php to a version that resolves this vulnerability.

    Fixed in 5.6.40
  6. Upgrade

    Upgrade redhat/php to a version that resolves this vulnerability.

    Fixed in 7.1.26
  7. Upgrade

    Upgrade redhat/php to a version that resolves this vulnerability.

    Fixed in 7.2.14
  8. Upgrade

    Upgrade redhat/php to a version that resolves this vulnerability.

    Fixed in 7.3.1
  9. Upgrade

    Upgrade PHP to a version that resolves this vulnerability.

    Fixed in 7.1.26
  10. Upgrade

    Upgrade debian/libgd2 to a version that resolves this vulnerability.

    Fixed in 2.3.0-2Fixed in 2.3.0-2+deb11u1Fixed in 2.3.3-9Fixed in 2.3.3-13
  11. Upgrade

    Upgrade alpine/gd to a version that resolves this vulnerability.

    Fixed in 2.2.5-r2
  12. Upgrade

    Upgrade alpine/php7 to a version that resolves this vulnerability.

    Fixed in 7.1.29-r0
  13. Upgrade

    Upgrade PHP 5.6.x to a version that resolves this vulnerability.

    Fixed in 5.6.40
  14. Upgrade

    Upgrade PHP 7.1.x to a version that resolves this vulnerability.

    Fixed in 7.1.26
  15. Upgrade

    Upgrade PHP 7.2.x to a version that resolves this vulnerability.

    Fixed in 7.2.14
  16. Upgrade

    Upgrade PHP 7.3.x to a version that resolves this vulnerability.

    Fixed in 7.3.1

Event History

Dec 9, 2018
CVE Published
12:00 AM
Jan 27, 2019
CVE Published
via MITRE·02:00 AM
Data Sourced
via MITRE·02:00 AM
Description
Data Sourced
via NVD·02:29 AM
RemedyDescriptionSeverityWeaknessAffected Software
Data Sourced
via OSV·02:29 AM
DescriptionSeverityAffected Software
Aug 6, 2026
Exploit Published
via GitHub·06:39 AM

Parent advisories

This vulnerability appears in the following advisories.

Frequently Asked Questions

1

What is CVE-2019-6977?

CVE-2019-6977 is a vulnerability in the GD Graphics Library (LibGD) that allows an attacker to trigger a heap-based buffer overflow.

2

Which software versions are affected by CVE-2019-6977?

CVE-2019-6977 affects PHP versions before 5.6.40, 7.x before 7.1.26, 7.2.x before 7.2.14, and 7.3.x before 7.3.1, as well as LibGD version 2.2.5.

3

How severe is CVE-2019-6977?

CVE-2019-6977 has a severity score of 8.8 (high).

4

How can I fix CVE-2019-6977?

To fix CVE-2019-6977, update your PHP version to 5.6.40 or later, 7.1.26 or later, 7.2.14 or later, or 7.3.1 or later. Additionally, update your LibGD version to 2.2.5-7.el8 or later.

5

Where can I find more information about CVE-2019-6977?

You can find more information about CVE-2019-6977 at the following references: [link1], [link2], [link3].

Company

Resources

Contact

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