CVE-2016-9843
published 2017-05-23CVE-2016-9843: The crc32_big function in crc32.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via vectors involving big-endian CRC…
PriorityP340critical9.8CVSS 3.1
AVNACLPRNUINSUCHIHAH
EPSS
6.00%
92.5th percentile
The crc32_big function in crc32.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via vectors involving big-endian CRC calculation.
Affected
62 ranges· showing 25
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apple | ios | — | — |
| apple | iphone_os | < 11 | 11 |
| apple | mac_os_x | >= 10.0.0 < 10.13.0 | 10.13.0 |
| apple | macos_high_sierra | — | — |
| apple | tvos | < 11.0 | 11.0 |
| apple | tvos | — | — |
| apple | watchos | < 4 | 4 |
| apple | watchos_4 | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| debian | debian_linux | — | — |
| debian | rsync | < rsync 3.1.3-6 (bookworm) | rsync 3.1.3-6 (bookworm) |
| debian | zlib | < rsync 3.1.3-6 (bookworm) | rsync 3.1.3-6 (bookworm) |
| mariadb | mariadb | >= 10.0.0 < 10.0.37 | 10.0.37 |
| mariadb | mariadb | >= 10.1.0 < 10.1.37 | 10.1.37 |
| mariadb | mariadb | >= 10.2.0 < 10.2.19 | 10.2.19 |
| mariadb | mariadb | >= 10.3.0 < 10.3.11 | 10.3.11 |
| mariadb | mariadb | >= 5.5.0 < 5.5.62 | 5.5.62 |
| msrc | azl3_fltk_1.3.8-1_on_azure_linux_3.0 | — | — |
| msrc | azl3_rubygem-mini_portile2_2.8.4-1_on_azure_linux_3.0 | — | — |
| netapp | active_iq_unified_manager | >= 7.3 | — |
| netapp | active_iq_unified_manager | >= 9.5 | — |
| nodejs | node.js | 4.0.0 – 4.1.2 | — |
| nodejs | node.js | >= 4.2.0 < 4.8.2 | 4.8.2 |
| nodejs | node.js | 6.0.0 – 6.8.1 | — |
CVSS provenance
nvdv3.19.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.07.5HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P
osv9.8CRITICAL
vendor_debian9.8CRITICAL
vendor_msrc9.8CRITICAL
vendor_redhat9.8CRITICAL
vendor_ubuntu8.8HIGH
vendor_oracle7.2CRITICAL
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Ubuntu
klibc vulnerabilities
vendor_ubuntu·2026-01-14
CVE-2016-9843 klibc vulnerabilities
Title: klibc vulnerabilities
Summary: klibc could be made to crash if it received specially crafted input.
It was discovered that zlib, vendored in klibc, did not properly handle
integer arithmetic. An attacker could possibly use this issue to execute
arbitrary code or cause a denial of service.
Instructions: In general, a standard system update will make all the necessary changes.
Oracle
Oracle Oracle Database Server Risk Matrix: Core RDBMS (zlib) — CVE-2016-9843
vendor_oracle·2020-07-15·CVSS 7.2
CVE-2016-9843 [CRITICAL] Oracle Oracle Database Server Risk Matrix: Core RDBMS (zlib) — CVE-2016-9843
Oracle Oracle Database Server Risk Matrix: Core RDBMS (zlib) vulnerability
CVE: CVE-2016-9843
CVSS: 7.2
Protocol: Oracle Net
Remote exploit: No
Affected versions: Network
Advisory: cpujul2020 (JUL 2020)
Ubuntu
rsync vulnerabilities
vendor_ubuntu·2020-02-25·CVSS 8.8
CVE-2016-9840 [HIGH] rsync vulnerabilities
Title: rsync vulnerabilities
Summary: Several security issues were fixed in rsync.
It was discovered that rsync incorrectly handled pointer arithmetic in zlib.
An attacker could use this issue to cause rsync to crash, resulting in a
denial of service, or possibly execute arbitrary code. (CVE-2016-9840,
CVE-2016-9841)
It was discovered that rsync incorrectly handled vectors involving left shifts
of negative integers in zlib. An attacker could use this issue to cause rsync
to crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2016-9842)
It was discovered that rsync incorrectly handled vectors involving big-endian
CRC calculation in zlib. An attacker could use this issue to cause rsync to
crash, resulting in a denial of service, or possibly execute arbitrary
Ubuntu
zlib vulnerabilities
vendor_ubuntu·2020-01-22·CVSS 8.8
CVE-2016-9840 [HIGH] zlib vulnerabilities
Title: zlib vulnerabilities
Summary: Several security issues were fixed in zlib
It was discovered that zlib incorrectly handled pointer arithmetic. An attacker
could use this issue to cause zlib to crash, resulting in a denial of
service, or possibly execute arbitrary code. (CVE-2016-9840, CVE-2016-9841)
It was discovered that zlib incorrectly handled vectors involving left shifts of
negative integers. An attacker could use this issue to cause zlib to
crash, resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2016-9842)
It was discovered that zlib incorrectly handled vectors involving big-endian CRC
calculation. An attacker could use this issue to cause zlib to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2016-9843)
Instructi
Apple
CVE-2016-9843: macOS High Sierra 10.13
vendor_apple·2017-09-25·CVSS 9.8
CVE-2016-9843 [CRITICAL] CVE-2016-9843: macOS High Sierra 10.13
Apple Security Update: About the security content of macOS High Sierra 10.13
Product: macOS High Sierra
Version: 10.13
CVE: CVE-2016-9843
Component: CVE-2016-9843
Apple
CVE-2016-9843: tvOS 11
vendor_apple·2017-09-19·CVSS 9.8
CVE-2016-9843 [CRITICAL] CVE-2016-9843: tvOS 11
Apple Security Update: About the security content of tvOS 11
Product: tvOS
Version: 11
CVE: CVE-2016-9843
Component: CVE-2016-9843
Apple
CVE-2016-9843: watchOS 4
vendor_apple·2017-09-19·CVSS 9.8
CVE-2016-9843 [CRITICAL] CVE-2016-9843: watchOS 4
Apple Security Update: About the security content of watchOS 4
Product: watchOS 4
CVE: CVE-2016-9843
Component: CVE-2016-9843
Apple
CVE-2016-9843: iOS 11
vendor_apple·2017-09-19·CVSS 9.8
CVE-2016-9843 [CRITICAL] CVE-2016-9843: iOS 11
Apple Security Update: About the security content of iOS 11
Product: iOS
Version: 11
CVE: CVE-2016-9843
Component: CVE-2016-9843
Microsoft
The crc32_big function in crc32.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via vectors involving big-endian CRC calculation.
vendor_msrc·2017-05-09·CVSS 9.8
CVE-2016-9843 [CRITICAL] The crc32_big function in crc32.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via vectors involving big-endian CRC calculation.
The crc32_big function in crc32.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via vectors involving big-endian CRC calculation.
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mari
Red Hat
zlib: Big-endian out-of-bounds pointer
vendor_redhat·2016-09-29·CVSS 9.8
CVE-2016-9843 [CRITICAL] zlib: Big-endian out-of-bounds pointer
zlib: Big-endian out-of-bounds pointer
The crc32_big function in crc32.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via vectors involving big-endian CRC calculation.
Package: zlib (Red Hat Enterprise Linux 5) - Not affected
Package: zlib (Red Hat Enterprise Linux 6) - Not affected
Package: zlib (Red Hat Enterprise Linux 7) - Not affected
Package: zlib (Red Hat JBoss Enterprise Application Platform 5) - Not affected
Package: zlib (Red Hat JBoss Enterprise Application Platform 6) - Not affected
Package: zlib (Red Hat JBoss Enterprise Web Server 1) - Not affected
Package: zlib (Red Hat JBoss Enterprise Web Server 2) - Not affected
Package: zlib (Red Hat JBoss Enterprise Web Server 3) - Not affected
Debian
CVE-2016-9843: rsync - The crc32_big function in crc32.c in zlib 1.2.8 might allow context-dependent at...
vendor_debian·2016·CVSS 9.8
CVE-2016-9843 [CRITICAL] CVE-2016-9843: rsync - The crc32_big function in crc32.c in zlib 1.2.8 might allow context-dependent at...
The crc32_big function in crc32.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via vectors involving big-endian CRC calculation.
Scope: local
bookworm: resolved (fixed in 3.1.3-6)
bullseye: resolved (fixed in 3.1.3-6)
forky: resolved (fixed in 3.1.3-6)
sid: resolved (fixed in 3.1.3-6)
trixie: resolved (fixed in 3.1.3-6)
GHSA
GHSA-q27x-567x-5347: The crc32_big function in crc32
ghsa_unreviewed·2022-05-13
CVE-2016-9843 [CRITICAL] GHSA-q27x-567x-5347: The crc32_big function in crc32
The crc32_big function in crc32.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via vectors involving big-endian CRC calculation.
OSV
rsync vulnerabilities
osv·2020-02-25·CVSS 8.8
CVE-2016-9840 [HIGH] rsync vulnerabilities
rsync vulnerabilities
It was discovered that rsync incorrectly handled pointer arithmetic in zlib.
An attacker could use this issue to cause rsync to crash, resulting in a
denial of service, or possibly execute arbitrary code. (CVE-2016-9840,
CVE-2016-9841)
It was discovered that rsync incorrectly handled vectors involving left shifts
of negative integers in zlib. An attacker could use this issue to cause rsync
to crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2016-9842)
It was discovered that rsync incorrectly handled vectors involving big-endian
CRC calculation in zlib. An attacker could use this issue to cause rsync to
crash, resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2016-9843)
OSV
zlib vulnerabilities
osv·2020-01-22·CVSS 8.8
CVE-2016-9840 [HIGH] zlib vulnerabilities
zlib vulnerabilities
It was discovered that zlib incorrectly handled pointer arithmetic. An attacker
could use this issue to cause zlib to crash, resulting in a denial of
service, or possibly execute arbitrary code. (CVE-2016-9840, CVE-2016-9841)
It was discovered that zlib incorrectly handled vectors involving left shifts of
negative integers. An attacker could use this issue to cause zlib to
crash, resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2016-9842)
It was discovered that zlib incorrectly handled vectors involving big-endian CRC
calculation. An attacker could use this issue to cause zlib to crash,
resulting in a denial of service, or possibly execute arbitrary code.
(CVE-2016-9843)
OSV
CVE-2016-9843: The crc32_big function in crc32
osv·2017-05-23·CVSS 9.8
CVE-2016-9843 [CRITICAL] CVE-2016-9843: The crc32_big function in crc32
The crc32_big function in crc32.c in zlib 1.2.8 might allow context-dependent attackers to have unspecified impact via vectors involving big-endian CRC calculation.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2016-9843 zlib: Big-endian out-of-bounds pointer
bugzilla·2016-12-07·CVSS 9.8
CVE-2016-9843 [CRITICAL] CVE-2016-9843 zlib: Big-endian out-of-bounds pointer
CVE-2016-9843 zlib: Big-endian out-of-bounds pointer
There was a small optimization for PowerPCs to pre-increment a pointer when accessing a word, instead of post-incrementing. This required prefacing the loop with a decrement of the pointer, possibly pointing before the object passed. This is not compliant with the C standard, for which decrementing a pointer before its allocated memory is undefined. When tested on a modern PowerPC with a modern compiler, the optimization no longer has any effect.
External References:
https://wiki.mozilla.org/images/0/09/Zlib-report.pdf
https://docs.google.com/document/d/10i1KZS5so8xDqH2rplRa2xet0tyTvvJlLbQQmZIUIKE/edit#heading=h.t13tvnx4loq7
Upstream patch:
https://github.com/madler/zlib/commit/d1d577490c15a0c6862473d7576352a9f18ef811
CVE assignmen
Bugzilla
CVE-2016-9840 CVE-2016-9841 CVE-2016-9842 CVE-2016-9843 zlib: various flaws [fedora-all]
bugzilla·2016-12-07·CVSS 8.8
CVE-2016-9840 [HIGH] CVE-2016-9840 CVE-2016-9841 CVE-2016-9842 CVE-2016-9843 zlib: various flaws [fedora-all]
CVE-2016-9840 CVE-2016-9841 CVE-2016-9842 CVE-2016-9843 zlib: various flaws [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of Fedora.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported v
Bugzilla
CVE-2014-9843 ImageMagick: incorrect boundary checks in DecodePSDPixels
bugzilla·2016-06-07·CVSS 9.8
CVE-2014-9843 [CRITICAL] CVE-2014-9843 ImageMagick: incorrect boundary checks in DecodePSDPixels
CVE-2014-9843 ImageMagick: incorrect boundary checks in DecodePSDPixels
Fixed boundary checks in DecodePSDPixels.
CVE assignment:
http://seclists.org/oss-sec/2016/q2/459
Upstream patch:
https://anonscm.debian.org/cgit/collab-maint/imagemagick.git/commit/?h=debian-patches/6.8.9.9-4-for-upstream&id=b8df15144d91a19ed545893ea492363635a1cb29
arXiv
Unveiling the Bandwidth Nightmare: CDN Compression Format Conversion Attacks
arxiv_fulltext·2024-09-01
Unveiling the Bandwidth Nightmare: CDN Compression Format Conversion Attacks
Unveiling the Bandwidth Nightmare: CDN Compression Format Conversion Attacks
1st Ziyu Lin
Fuzhou University
Fuzhou, China
[email protected]
2nd Zhiwei Lin
Sichuan University
Chengdu, China
[email protected]
3rd Ximeng Liu^
Fuzhou University
Fuzhou, China
[email protected]
4th Zuobing Ying
City University of Macau
Macau, China
[email protected]
5th Cheng Chen
Fuzhou University
Fuzhou, China
[email protected]
## Abstract
Content Delivery Networks (CDNs) are designed to enhance network performance and protect against web attack traffic for their hosting websites.
And the HTTP compression request mechanism primarily aims to reduce unnecessary network transfers.
However, we find that the specification failed to consider the security risks introduced when CDNs meet compres
http://lists.opensuse.org/opensuse-updates/2016-12/msg00127.htmlhttp://lists.opensuse.org/opensuse-updates/2017-01/msg00050.htmlhttp://lists.opensuse.org/opensuse-updates/2017-01/msg00053.htmlhttp://www.openwall.com/lists/oss-security/2016/12/05/21http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.htmlhttp://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.htmlhttp://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.htmlhttp://www.securityfocus.com/bid/95131http://www.securitytracker.com/id/1039427http://www.securitytracker.com/id/1041888https://access.redhat.com/errata/RHSA-2017:1220https://access.redhat.com/errata/RHSA-2017:1221https://access.redhat.com/errata/RHSA-2017:1222https://access.redhat.com/errata/RHSA-2017:2999https://access.redhat.com/errata/RHSA-2017:3046https://access.redhat.com/errata/RHSA-2017:3047https://access.redhat.com/errata/RHSA-2017:3453https://bugzilla.redhat.com/show_bug.cgi?id=1402351https://github.com/madler/zlib/commit/d1d577490c15a0c6862473d7576352a9f18ef811https://lists.debian.org/debian-lts-announce/2019/03/msg00027.htmlhttps://lists.debian.org/debian-lts-announce/2020/01/msg00030.htmlhttps://security.gentoo.org/glsa/201701-56https://security.gentoo.org/glsa/202007-54https://security.netapp.com/advisory/ntap-20181018-0002/https://support.apple.com/HT208112https://support.apple.com/HT208113https://support.apple.com/HT208115https://support.apple.com/HT208144https://usn.ubuntu.com/4246-1/https://usn.ubuntu.com/4292-1/https://wiki.mozilla.org/MOSS/Secure_Open_Source/Completed#zlibhttps://wiki.mozilla.org/images/0/09/Zlib-report.pdfhttps://www.oracle.com/security-alerts/cpujul2020.htmlhttp://lists.opensuse.org/opensuse-updates/2016-12/msg00127.htmlhttp://lists.opensuse.org/opensuse-updates/2017-01/msg00050.htmlhttp://lists.opensuse.org/opensuse-updates/2017-01/msg00053.htmlhttp://www.openwall.com/lists/oss-security/2016/12/05/21http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.htmlhttp://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.htmlhttp://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.htmlhttp://www.securityfocus.com/bid/95131http://www.securitytracker.com/id/1039427http://www.securitytracker.com/id/1041888https://access.redhat.com/errata/RHSA-2017:1220https://access.redhat.com/errata/RHSA-2017:1221https://access.redhat.com/errata/RHSA-2017:1222https://access.redhat.com/errata/RHSA-2017:2999https://access.redhat.com/errata/RHSA-2017:3046https://access.redhat.com/errata/RHSA-2017:3047https://access.redhat.com/errata/RHSA-2017:3453https://bugzilla.redhat.com/show_bug.cgi?id=1402351https://github.com/madler/zlib/commit/d1d577490c15a0c6862473d7576352a9f18ef811https://lists.debian.org/debian-lts-announce/2019/03/msg00027.htmlhttps://lists.debian.org/debian-lts-announce/2020/01/msg00030.htmlhttps://security.gentoo.org/glsa/201701-56https://security.gentoo.org/glsa/202007-54https://security.netapp.com/advisory/ntap-20181018-0002/https://support.apple.com/HT208112https://support.apple.com/HT208113https://support.apple.com/HT208115https://support.apple.com/HT208144https://usn.ubuntu.com/4246-1/https://usn.ubuntu.com/4292-1/https://wiki.mozilla.org/MOSS/Secure_Open_Source/Completed#zlibhttps://wiki.mozilla.org/images/0/09/Zlib-report.pdfhttps://www.oracle.com/security-alerts/cpujul2020.html
2017-05-23
Published