CVE-2016-1834

Advisory lineage Upstream: 0 Downstream: 11
Modified
Published: 20 May 2016, 10:00
Last modified:04 Dec 2025, 17:15

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
9.3 HIGH
v2.0 (nvd)
EPSS Score
2.31% LOW
2% probability -0.06%
KEV
Not listed
Ransomware
No reports
Public exploits
1 found
Dark Web
Not detected

Timeline

20 May 2016, 10:00
Published
Vulnerability first disclosed
04 Dec 2025, 17:15
Last Modified
Vulnerability information updated

Description

Heap-based buffer overflow in the xmlStrncat function in libxml2 before 2.9.4, as used in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS before 9.2.1, and watchOS before 2.2.1, allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted XML document.

CVSS Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  • v3.0•HIGH•Score: 7.8CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
  • v2.0•HIGH•Score: 9.3AV:N/AC:M/Au:N/C:C/I:C/A:C

EPSS Trends

Current EPSS score: 2.31%• Percentile: 85%

Techniques & Countermeasures

  • CWE-119•Improper Restriction of Operations within the Bounds of a Memory Buffer

    The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

  • CWE-122•Heap-based Buffer Overflow

    A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Affected Systems

  • apple•iphone_os

    < 9.3.2

  • apple•mac_os_x

    < 10.11.5

  • apple•tvos

    < 9.2.1

  • apple•watchos

    < 2.2.1

  • canonical•ubuntu_linux

    12.04 | 14.04 | 15.10 | 16.04

  • debian•debian_linux

    8.0

  • mcafee•web_gateway

    ≥ 7.5.0.0, ≤ 7.5.2.10 | ≥ 7.6.0.0, ≤ 7.6.2.3

  • redhat•enterprise_linux_desktop

    6.0 | 7.0

  • redhat•enterprise_linux_server

    6.0 | 7.0

  • redhat•enterprise_linux_server_aus

    7.2 | 7.3 | 7.4 | 7.6

  • redhat•enterprise_linux_server_eus

    7.2 | 7.3 | 7.4 | 7.5 | 7.6

  • redhat•enterprise_linux_server_tus

    7.2 | 7.3 | 7.6

  • redhat•enterprise_linux_workstation

    6.0 | 7.0

  • xmlsoft•libxml2

    < 2.9.4

References (21)