CVE-2016-4473: php Use After Free

Modified

AliasesUBUNTU-CVE-2016-4473

Published 08-06-2017Last modified 06-08-2024

Vulnerability summary

CVE-2016-4473 is a critical (CVSS 9.8) Use After Free vulnerability in php. EPSS estimates a 7.75% chance of exploitation in the next 30 days, higher than 94.6% of scored vulnerabilities. 1 public exploit is recorded.

Priority

Prioritisepublic exploit

Public exploit (reference, Date unknown)

Source freshness unavailable

How is this decided?

CVSS score

9.8/10

010

Critical · v3.0 (NVD)

EPSS score

7.75%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 4 · Related 2

DLA-628-1 RHSA-2016:2750 SUSE-SU-2016:2460-1 SUSE-SU-2016:2460-2

Timeline

08-06-2017
PublishedVulnerability first disclosed.
06-08-2024
Last modifiedVulnerability information updated.

Description

/ext/phar/phar_object.c in PHP 7.0.7 and 5.6.x allows remote attackers to execute arbitrary code. NOTE: Introduced as part of an incomplete fix to CVE-2015-6833.

CVSS metrics

3 scores · 2 sources · 2 versions

v3.09.8v2.07.5

EPSS trend

Probability

7.75%

Chance of exploitation in the next 30 days

Percentile

95%

Versus all other CVEs

30-day change

No change 0.00 pp

From 7.75% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

1 found

referenceUnverified
Exploit Reference (bugzilla.redhat.com)
Maturity: unknown

Weaknesses

CWE · root cause

CWE-416Use After FreeThe product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Suse2 products

Ubuntu2 products

php5< 5.5.9+dfsg-1ubuntu4.19
php7.0< 7.0.8-0ubuntu0.16.04.2

Php1 product

phpEOL5.6.0:alpha1 | 5.6.0:alpha2 | 5.6.0:alpha3 | 5.6.0:alpha4 | 5.6.0:alpha5 | 5.6.0:beta1 | 5.6.0:beta2 | 5.6.0:beta3 | 5.6.0:beta4 | 5.6.1 | 5.6.2 | 5.6.3 | 5.6.4 | 5.6.5 | 5.6.6 | 5.6.7 | 5.6.8 | 5.6.9 | 5.6.10 | 5.6.11 | 5.6.12 | 5.6.13 | 5.6.14 | 5.6.15 | 5.6.16 | 5.6.17 | 5.6.18 | 5.6.19 | 5.6.20 | 5.6.21 | 5.6.22 | 7.0.7

3 vendors · 5 products

References

7 links

lists.opensuse.org/opensuse-security-announce/2016-10/msg00007.htmlVendor AdvisoryX Refsource SUSEThird Party Advisory
rhn.redhat.com/errata/RHSA-2016-2750.htmlVendor AdvisoryX Refsource REDHATThird Party AdvisoryVDB Entry
www.securityfocus.com/bid/98999VDB EntryX Refsource BIDThird Party Advisory
bugzilla.redhat.com/show_bug.cgi?id=1347772X Refsource CONFIRMExploitIssue TrackingPatchThird Party AdvisoryVDB Entry
ubuntu.com/security/CVE-2016-4473REPORT
php.net/ChangeLog-5.phpREPORT
www.cve.org/CVERecord?id=CVE-2016-4473REPORT