CVE catalog

CVE-2016-6296

xmlrpc-epi: CVE-2016-6296

Severity: Critical · CVSS 9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: Jul 17, 2016, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 6.27% · Oct 25, 2026

Integer signedness error in the simplestring_addn function in simplestring.c in xmlrpc-epi through 0.54.2, as used in PHP before 5.5.38, 5.6.x before 5.6.24, and 7.x before 7.0.9, allows remote attackers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact via a long first argument to the PHP xmlrpc_encode_request function.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	xmlrpc-epi	sid	`0.54.2-3`	fixed
Debian	xmlrpc-epi	forky	`0.54.2-3`	fixed
Debian	xmlrpc-epi	trixie	`0.54.2-3`	fixed
Debian	xmlrpc-epi	bookworm	`0.54.2-1.3`	fixed
Ubuntu	php5	14.04	`5.5.3+dfsg-1ubuntu2`	vulnerable
Ubuntu	php5	14.04	`5.5.3+dfsg-1ubuntu3`	vulnerable
Ubuntu	php5	14.04	`5.5.6+dfsg-1ubuntu1`	vulnerable
Ubuntu	php5	14.04	`5.5.6+dfsg-1ubuntu2`	vulnerable
Ubuntu	php5	14.04	`5.5.8+dfsg-2ubuntu1`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu1`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu2`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu3`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.1`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.2`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.3`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.4`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.5`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.6`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.7`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.9`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.11`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.12`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.13`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.14`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.16`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.17`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.19`	fixed
Ubuntu	php7.0	16.04	`7.0.1-5`	vulnerable
Ubuntu	php7.0	16.04	`7.0.1-6`	vulnerable
Ubuntu	php7.0	16.04	`7.0.2-1`	vulnerable
Ubuntu	php7.0	16.04	`7.0.2-3`	vulnerable
Ubuntu	php7.0	16.04	`7.0.2-4`	vulnerable
Ubuntu	php7.0	16.04	`7.0.2-5`	vulnerable
Ubuntu	php7.0	16.04	`7.0.3-2`	vulnerable
Ubuntu	php7.0	16.04	`7.0.3-3`	vulnerable
Ubuntu	php7.0	16.04	`7.0.3-9ubuntu1`	vulnerable
Ubuntu	php7.0	16.04	`7.0.4-5ubuntu1`	vulnerable
Ubuntu	php7.0	16.04	`7.0.4-5ubuntu2`	vulnerable
Ubuntu	php7.0	16.04	`7.0.4-7ubuntu1`	vulnerable
Ubuntu	php7.0	16.04	`7.0.4-7ubuntu2`	vulnerable
Ubuntu	php7.0	16.04	`7.0.4-7ubuntu2.1`	vulnerable
Ubuntu	php7.0	16.04	`7.0.8-0ubuntu0.16.04.1`	vulnerable
Ubuntu	php7.0	16.04	`7.0.8-0ubuntu0.16.04.2`	fixed
Ubuntu	php5	14.04	`5.5.3+dfsg-1ubuntu2`	vulnerable
Ubuntu	php5	14.04	`5.5.3+dfsg-1ubuntu3`	vulnerable
Ubuntu	php5	14.04	`5.5.6+dfsg-1ubuntu1`	vulnerable
Ubuntu	php5	14.04	`5.5.6+dfsg-1ubuntu2`	vulnerable
Ubuntu	php5	14.04	`5.5.8+dfsg-2ubuntu1`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu1`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu2`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu3`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.1`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.2`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.3`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.4`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.5`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.6`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.7`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.9`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.11`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.12`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.13`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.14`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.16`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.17`	vulnerable
Ubuntu	php5	14.04	`5.5.9+dfsg-1ubuntu4.19`	fixed
Ubuntu	xmlrpc-epi	14.04	`0.54.2-1`	vulnerable
Ubuntu	xmlrpc-epi	14.04	`0.54.2-1ubuntu1`	vulnerable
Ubuntu	xmlrpc-epi	14.04	`0.54.2-1+deb7u1ubuntu0.14.04.2`	fixed
Ubuntu	php7.0	16.04	`7.0.1-5`	vulnerable
Ubuntu	php7.0	16.04	`7.0.1-6`	vulnerable
Ubuntu	php7.0	16.04	`7.0.2-1`	vulnerable
Ubuntu	php7.0	16.04	`7.0.2-3`	vulnerable
Ubuntu	php7.0	16.04	`7.0.2-4`	vulnerable
Ubuntu	php7.0	16.04	`7.0.2-5`	vulnerable
Ubuntu	php7.0	16.04	`7.0.3-2`	vulnerable
Ubuntu	php7.0	16.04	`7.0.3-3`	vulnerable
Ubuntu	php7.0	16.04	`7.0.3-9ubuntu1`	vulnerable
Ubuntu	php7.0	16.04	`7.0.4-5ubuntu1`	vulnerable
Ubuntu	php7.0	16.04	`7.0.4-5ubuntu2`	vulnerable
Ubuntu	php7.0	16.04	`7.0.4-7ubuntu1`	vulnerable
Ubuntu	php7.0	16.04	`7.0.4-7ubuntu2`	vulnerable
Ubuntu	php7.0	16.04	`7.0.4-7ubuntu2.1`	vulnerable
Ubuntu	php7.0	16.04	`7.0.8-0ubuntu0.16.04.1`	vulnerable
Ubuntu	php7.0	16.04	`7.0.8-0ubuntu0.16.04.2`	fixed
Ubuntu	xmlrpc-epi	16.04	`0.54.2-1.1`	vulnerable
Ubuntu	xmlrpc-epi	16.04	`0.54.2-1.1ubuntu0.1`	fixed
Ubuntu	xmlrpc-epi	16.04	`0.54.2-1.1`	vulnerable
Ubuntu	xmlrpc-epi	16.04	`0.54.2-1.1ubuntu0.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	xmlrpc-epi	source	sid	`0.54.2-1.2`	not yet assigned	Not reported	[832959]
Debian	xmlrpc-epi	source	forky	`0.54.2-1.2`	not yet assigned	Not reported	[832959]
Debian	xmlrpc-epi	source	trixie	`0.54.2-1.2`	not yet assigned	Not reported	[832959]
Debian	xmlrpc-epi	source	bookworm	`0.54.2-1.2`	not yet assigned	Not reported	[832959]
Ubuntu	php5	deb	14.04	`5.5.9+dfsg-1ubuntu4.19`	Not reported	USN-3045-1	Not reported
Ubuntu	php7.0	deb	16.04	`7.0.8-0ubuntu0.16.04.2`	Not reported	USN-3045-1	Not reported
Ubuntu	php5	deb	14.04	`5.5.9+dfsg-1ubuntu4.19`	Not reported	UBUNTU-CVE-2016-6296	Not reported
Ubuntu	xmlrpc-epi	deb	14.04	`0.54.2-1+deb7u1ubuntu0.14.04.2`	Not reported	UBUNTU-CVE-2016-6296	Not reported
Ubuntu	php7.0	deb	16.04	`7.0.8-0ubuntu0.16.04.2`	Not reported	UBUNTU-CVE-2016-6296	Not reported
Ubuntu	xmlrpc-epi	deb	16.04	`0.54.2-1.1ubuntu0.1`	Not reported	UBUNTU-CVE-2016-6296	Not reported
Ubuntu	xmlrpc-epi	deb	16.04	`0.54.2-1.1ubuntu0.1`	Not reported	USN-3059-1	Not reported

[Debian bug #832959]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libxmlrpc-epi0]Fixed
Source package: [xmlrpc-epi]
Details (2)
- 0.54.2-1.3+b1 · amd64 · bookworm
  Fixed · Fixed: 0.54.2-1.2
  dsa · xmlrpc-epi · debian · bookworm; dsa · xmlrpc-epi · debian · 12
- 0.54.2-1.3+b1 · arm64 · bookworm
  Fixed · Fixed: 0.54.2-1.2
  dsa · xmlrpc-epi · debian · bookworm; dsa · xmlrpc-epi · debian · 12
[libxmlrpc-epi0-dbg]Fixed
Source package: [xmlrpc-epi]
Details (2)
- 0.54.2-1.3+b1 · amd64 · bookworm
  Fixed · Fixed: 0.54.2-1.2
  dsa · xmlrpc-epi · debian · bookworm; dsa · xmlrpc-epi · debian · 12
- 0.54.2-1.3+b1 · arm64 · bookworm
  Fixed · Fixed: 0.54.2-1.2
  dsa · xmlrpc-epi · debian · bookworm; dsa · xmlrpc-epi · debian · 12
[libxmlrpc-epi-dev]Fixed
Source package: [xmlrpc-epi]
Details (2)
- 0.54.2-1.3+b1 · amd64 · bookworm
  Fixed · Fixed: 0.54.2-1.2
  dsa · xmlrpc-epi · debian · bookworm; dsa · xmlrpc-epi · debian · 12
- 0.54.2-1.3+b1 · arm64 · bookworm
  Fixed · Fixed: 0.54.2-1.2
  dsa · xmlrpc-epi · debian · bookworm; dsa · xmlrpc-epi · debian · 12

[Debian 13 (Trixie)]

[libxmlrpc-epi0t64]Fixed
Source package: [xmlrpc-epi]
Details (2)
- 0.54.2-3+b1 · amd64 · trixie
  Fixed · Fixed: 0.54.2-1.2
  dsa · xmlrpc-epi · debian · 13
- 0.54.2-3+b1 · arm64 · trixie
  Fixed · Fixed: 0.54.2-1.2
  dsa · xmlrpc-epi · debian · 13
[libxmlrpc-epi-dev]Fixed
Source package: [xmlrpc-epi]
Details (2)
- 0.54.2-3+b1 · amd64 · trixie
  Fixed · Fixed: 0.54.2-1.2
  dsa · xmlrpc-epi · debian · 13
- 0.54.2-3+b1 · arm64 · trixie
  Fixed · Fixed: 0.54.2-1.2
  dsa · xmlrpc-epi · debian · 13

Observed: Oct 23, 2026, 5:22:36 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]