# What is CVE-2019-7317?

> CVE-2019-7317 is a medium-severity flaw (CVSS 5.3) in Libpng, published on 4 February 2019. It is not on the list of flaws known to be exploited today. The latest forecast puts its chance of use in the next 30 days at 9.4%. If you run an affected version, plan in the vendor’s fix.

Canonical page: https://www.precursorintelligence.com/what-is/cve-2019-7317

## At a glance

- **Verdict:** Plan it in. No sign of exploitation and a low forecast. Patch it in your normal update cycle.
- **Precursor Intelligence risk score:** 41 out of 100 (Medium); action: Plan remediation. Kept up to date as the evidence changes.
- **Severity:** Medium (CVSS 5.3 out of 10)
- **Known to be exploited:** No, not on the list of flaws known to be exploited today
- **Chance of use in the next 30 days:** 9.4% (latest exploit-likelihood forecast)
- **Published:** 4 February 2019
- **Record last updated:** 21 October 2024
- **Main product:** Libpng
- **Affected products:** 33

## What is CVE-2019-7317? In plain terms

It can be attacked from anywhere on the internet without logging in, but a person has to take an action first. If it works, the attacker can take it offline.

### The official description

png_image_free in png.c in libpng 1.6.x before 1.6.37 has a use-after-free because png_image_free_function is called under png_safe_execute.

### What kind of flaw is it?

- CWE-416: Use After Free

### How an attack on it works

- Where an attacker can be: Anywhere on the internet
- How hard it is to pull off: Hard: conditions must line up
- Login needed first: No login needed
- Does someone have to click: Yes, a person has to take an action
- What an attacker gets: Can take it offline

Severity vector: `CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H`

## Is CVE-2019-7317 being exploited? Not that we know of

It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 9.4%. That can change at any time, which is why we keep watching.

Exploit likelihood over the last 7 days: 9.4%, 9.4%, 9.4%, 9.4%, 9.4%, 9.4%, 9.4%.

### Timeline

- 4 February 2019: Published
- 21 October 2024: Record last updated

### How Precursor Intelligence ranks it

CVE-2019-7317 scores **41 out of 100 (Medium)**, with the action "Plan remediation".

Every published flaw gets a risk score from 0 to 100, kept up to date as the evidence changes. Four things go into the score, from the one that counts most to the ones that count less:

- Evidence it is being exploited: biggest factor
- How severe it is: strong factor
- How widely exposed it is: smaller factor
- Threat activity around it: smaller factor

85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score. When this flaw matches software you track, it lands in your list with its score and the reasons behind it.

## Who is affected by CVE-2019-7317?

The published record lists 33 products. Versions are as published: "1.6.0 to before 1.6.37" means from 1.6.0 up to, but not including, 1.6.37.

- [Libpng](https://www.precursorintelligence.com/product/libpng/libpng) by [Libpng](https://www.precursorintelligence.com/vendors/libpng) (Application): 1.6.0 to before 1.6.37
- [Ubuntu Linux](https://www.precursorintelligence.com/product/canonical/ubuntu_linux) by [Canonical](https://www.precursorintelligence.com/vendors/canonical) (Operating system): 16.04, 18.04, 18.10, 19.04
- [Enterprise Linux](https://www.precursorintelligence.com/product/redhat/enterprise_linux) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Operating system): 6.0, 7.0, 8.0
- [Enterprise Linux for Ibm Z Systems](https://www.precursorintelligence.com/product/redhat/enterprise_linux_for_ibm_z_systems) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Operating system): 6.0, 7.0, 8.0
- [Leap](https://www.precursorintelligence.com/product/opensuse/leap) by [Opensuse](https://www.precursorintelligence.com/vendors/opensuse) (Operating system): 15.0, 15.1, 42.3
- [Active Iq Unified Manager](https://www.precursorintelligence.com/product/netapp/active_iq_unified_manager) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Application): before 9.6, 9.6
- [Debian Linux](https://www.precursorintelligence.com/product/debian/debian_linux) by [Debian](https://www.precursorintelligence.com/vendors/debian) (Operating system): 8.0, 9.0
- [Enterprise Linux Desktop](https://www.precursorintelligence.com/product/redhat/enterprise_linux_desktop) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Operating system): 6.0, 7.0
- [Enterprise Linux for Power Big Endian](https://www.precursorintelligence.com/product/redhat/enterprise_linux_for_power_big_endian) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Operating system): 6.0, 7.0
- [Enterprise Linux for Power Little Endian](https://www.precursorintelligence.com/product/redhat/enterprise_linux_for_power_little_endian) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Operating system): 7.0, 8.0
- [Enterprise Linux for Scientific Computing](https://www.precursorintelligence.com/product/redhat/enterprise_linux_for_scientific_computing) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Operating system): 6.0, 7.0
- [Enterprise Linux Workstation](https://www.precursorintelligence.com/product/redhat/enterprise_linux_workstation) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Operating system): 6.0, 7.0
- [Java Se](https://www.precursorintelligence.com/product/oracle/java_se) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 7u221, 8u212
- [JDK](https://www.precursorintelligence.com/product/oracle/jdk) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 11.0.3, 12.0.1
- [Snapmanager](https://www.precursorintelligence.com/product/netapp/snapmanager) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Application): before 3.4.2, 3.4.2-p1
- [Cloud Backup](https://www.precursorintelligence.com/product/netapp/cloud_backup) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Application): version not specified
- [E-Series Santricity Management](https://www.precursorintelligence.com/product/netapp/e-series_santricity_management) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Application): version not specified
- [E-Series Santricity Storage Manager](https://www.precursorintelligence.com/product/netapp/e-series_santricity_storage_manager) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Application): before 11.53
- [E-Series Santricity Unified Manager](https://www.precursorintelligence.com/product/netapp/e-series_santricity_unified_manager) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Application): before 3.2
- [E-Series Santricity Web Services](https://www.precursorintelligence.com/product/netapp/e-series_santricity_web_services) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Application): before 4.0
- [Firefox](https://www.precursorintelligence.com/product/mozilla/firefox) by [Mozilla](https://www.precursorintelligence.com/vendors/mozilla) (Application): version not specified
- [Hyperion Infrastructure Technology](https://www.precursorintelligence.com/product/oracle/hyperion_infrastructure_technology) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): 11.2.6.0
- [Linux Enterprise](https://www.precursorintelligence.com/product/suse/linux_enterprise) by [Suse](https://www.precursorintelligence.com/vendors/suse) (Operating system): 12.0
- [MySQL](https://www.precursorintelligence.com/product/oracle/mysql) by [Oracle](https://www.precursorintelligence.com/vendors/oracle) (Application): before 8.0.23
- [Oncommand Insight](https://www.precursorintelligence.com/product/netapp/oncommand_insight) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Application): before 7.3.9
- [Oncommand Workflow Automation](https://www.precursorintelligence.com/product/netapp/oncommand_workflow_automation) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Application): before 5.1
- [Package Hub](https://www.precursorintelligence.com/product/opensuse/package_hub) by [Opensuse](https://www.precursorintelligence.com/vendors/opensuse) (Application): version not specified
- [Plug-in for Symantec Netbackup](https://www.precursorintelligence.com/product/netapp/plug-in_for_symantec_netbackup) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Application): version not specified
- [Satellite](https://www.precursorintelligence.com/product/redhat/satellite) by [Red Hat](https://www.precursorintelligence.com/vendors/redhat) (Application): 5.8
- [Steelstore](https://www.precursorintelligence.com/product/netapp/steelstore) by [Netapp](https://www.precursorintelligence.com/vendors/netapp) (Application): version not specified
- [Thunderbird](https://www.precursorintelligence.com/product/mozilla/thunderbird) by [Mozilla](https://www.precursorintelligence.com/vendors/mozilla) (Application): version not specified
- [Xp7 Command View](https://www.precursorintelligence.com/product/hp/xp7_command_view) by [HP](https://www.precursorintelligence.com/vendors/hp) (Application): before 8.7.0-00
- [Xp7 Command View Advanced Edition Suite](https://www.precursorintelligence.com/product/hpe/xp7_command_view_advanced_edition_suite) by [HPE](https://www.precursorintelligence.com/vendors/hpe) (Application): before 8.7.0-00

## How do I fix CVE-2019-7317?

1. **Check whether you run it.** Compare your versions with the affected products above. Not sure what you run? Precursor Intelligence can work it out from your public website, or you can pick it from a list.
2. **Apply the vendor’s fix.** Install the update named in the vendor’s advisory. We’ve put the advisory first in the list.
3. **If you can’t patch today.** Follow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in.
4. **Keep an eye on it.** Track the product and we tell you as soon as we spot this flaw on the list of exploited flaws, or a jump in its exploit likelihood.

### References

- [oracle.com](https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html) (Patch, Third-party advisory)
- [lists.opensuse.org](http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00002.html) (Third-party advisory)
- [lists.opensuse.org](http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00029.html) (Mailing list, Third-party advisory)
- [lists.opensuse.org](http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00084.html) (Mailing list, Third-party advisory)
- [lists.opensuse.org](http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00038.html) (Mailing list, Third-party advisory)
- [lists.opensuse.org](http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00044.html) (Mailing list, Third-party advisory)
- [packetstormsecurity.com](http://packetstormsecurity.com/files/152561/Slackware-Security-Advisory-libpng-Updates.html) (Vulnerability database, Third-party advisory)
- [securityfocus.com](http://www.securityfocus.com/bid/108098) (Not applicable, Third-party advisory, Vulnerability database)
- [access.redhat.com](https://access.redhat.com/errata/RHSA-2019:1265) (Third-party advisory)
- [access.redhat.com](https://access.redhat.com/errata/RHSA-2019:1267) (Third-party advisory)
- [access.redhat.com](https://access.redhat.com/errata/RHSA-2019:1269) (Third-party advisory)
- [access.redhat.com](https://access.redhat.com/errata/RHSA-2019:1308) (Third-party advisory)
- [access.redhat.com](https://access.redhat.com/errata/RHSA-2019:1309) (Third-party advisory)
- [access.redhat.com](https://access.redhat.com/errata/RHSA-2019:1310) (Third-party advisory)
- [access.redhat.com](https://access.redhat.com/errata/RHSA-2019:2494) (Third-party advisory)
- [access.redhat.com](https://access.redhat.com/errata/RHSA-2019:2495) (Third-party advisory)
- [access.redhat.com](https://access.redhat.com/errata/RHSA-2019:2585) (Third-party advisory)
- [access.redhat.com](https://access.redhat.com/errata/RHSA-2019:2590) (Third-party advisory)
- [access.redhat.com](https://access.redhat.com/errata/RHSA-2019:2592) (Third-party advisory)
- [access.redhat.com](https://access.redhat.com/errata/RHSA-2019:2737) (Third-party advisory)
- [bugs.chromium.org](https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=12803) (Issue tracking, Mailing list, Third-party advisory)
- [github.com](https://github.com/glennrp/libpng/issues/275) (Exploit, Issue tracking, Third-party advisory)
- [lists.debian.org](https://lists.debian.org/debian-lts-announce/2019/05/msg00032.html) (Mailing list, Third-party advisory)
- [lists.debian.org](https://lists.debian.org/debian-lts-announce/2019/05/msg00038.html) (Mailing list, Third-party advisory)
- [seclists.org](https://seclists.org/bugtraq/2019/Apr/30) (Issue tracking, Mailing list, Third-party advisory)
- [seclists.org](https://seclists.org/bugtraq/2019/Apr/36) (Issue tracking, Mailing list, Third-party advisory)
- [seclists.org](https://seclists.org/bugtraq/2019/May/56) (Issue tracking, Mailing list, Third-party advisory)
- [seclists.org](https://seclists.org/bugtraq/2019/May/59) (Issue tracking, Mailing list, Third-party advisory)
- [seclists.org](https://seclists.org/bugtraq/2019/May/67) (Issue tracking, Mailing list, Third-party advisory)
- [security.gentoo.org](https://security.gentoo.org/glsa/201908-02) (Third-party advisory)
- [security.netapp.com](https://security.netapp.com/advisory/ntap-20190719-0005/) (Third-party advisory)
- [support.hpe.com](https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbst03977en_us) (Third-party advisory)
- [usn.ubuntu.com](https://usn.ubuntu.com/3962-1/) (Third-party advisory)
- [usn.ubuntu.com](https://usn.ubuntu.com/3991-1/) (Third-party advisory)
- [usn.ubuntu.com](https://usn.ubuntu.com/3997-1/) (Third-party advisory)
- [usn.ubuntu.com](https://usn.ubuntu.com/4080-1/) (Third-party advisory)
- [usn.ubuntu.com](https://usn.ubuntu.com/4083-1/) (Third-party advisory)
- [debian.org](https://www.debian.org/security/2019/dsa-4435) (Third-party advisory)
- [debian.org](https://www.debian.org/security/2019/dsa-4448) (Third-party advisory)
- [debian.org](https://www.debian.org/security/2019/dsa-4451) (Third-party advisory)
- [oracle.com](https://www.oracle.com/security-alerts/cpuApr2021.html) (Third-party advisory)
- [oracle.com](https://www.oracle.com/security-alerts/cpuoct2021.html) (Third-party advisory)

## Questions

### What is CVE-2019-7317?

CVE-2019-7317 is a medium-severity flaw in Libpng, published on 4 February 2019. It can be attacked from anywhere on the internet without logging in, but a person has to take an action first. If it works, the attacker can take it offline.

### How serious is CVE-2019-7317?

It scores 5.3 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-2019-7317 is 41 out of 100, which is Medium. Its action is "Plan remediation". No sign of exploitation and a low forecast. Patch it in your normal update cycle.

### Is CVE-2019-7317 being exploited?

It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 9.4%. That can change at any time, which is why we keep watching.

### Which versions does CVE-2019-7317 affect?

For Libpng: 1.6.0 to before 1.6.37. The record lists 33 products in all, each with its versions, under "Who is affected" on this page.

### How do I fix CVE-2019-7317?

Install the update the vendor names in its advisory, linked first under "How do I fix" on this page. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet.

## Does CVE-2019-7317 affect you?

Precursor Intelligence keeps checking for you:

- **Tell us what you run.** Pick your software from a list, or let us work it out from your website.
- **We match it to every flaw.** Over 400,000 published flaws, checked against your list.
- **Ranked by real-world risk.** Every flaw gets a 0 to 100 risk score, kept up to date, led by evidence criminals are using it.
- **Told as soon as we know.** An alert by email, in the app or by webhook to your own tools.

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