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debianDebianDEBIAN:DSA-4921-1:0CBF5
HistoryMay 28, 2021 - 12:05 p.m.

[SECURITY] [DSA 4921-1] nginx security update

2021-05-2812:05:07
lists.debian.org
97
nginx
debian
vulnerability
off-by-one vulnerability
denial of service
arbitrary code execution

CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS3

7.7

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

AI Score

6.8

Confidence

Low

EPSS

0.389

Percentile

97.3%

JSON

Debian Security Advisory DSA-4921-1 [email protected]
https://www.debian.org/security/ Moritz Muehlenhoff
May 28, 2021 https://www.debian.org/security/faq

Package : nginx
CVE ID : CVE-2021-23017
Debian Bug : 989095

Luis Merino, Markus Vervier and Eric Sesterhenn discovered an off-by-one
in Nginx, a high-performance web and reverse proxy server, which could
result in denial of service and potentially the execution of arbitrary
code.

For the stable distribution (buster), this problem has been fixed in
version 1.14.2-2+deb10u4.

We recommend that you upgrade your nginx packages.

For the detailed security status of nginx please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/nginx

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

Mailing list: [email protected]

OSVersionArchitecturePackageVersionFilename
Debian10s390xlibnginx-mod-http-lua< 1.14.2-2+deb10u4libnginx-mod-http-lua_1.14.2-2+deb10u4_s390x.deb
Debian10i386libnginx-mod-http-subs-filter< 1.14.2-2+deb10u4libnginx-mod-http-subs-filter_1.14.2-2+deb10u4_i386.deb
Debian10mips64ellibnginx-mod-http-headers-more-filter< 1.14.2-2+deb10u4libnginx-mod-http-headers-more-filter_1.14.2-2+deb10u4_mips64el.deb
Debian9amd64libnginx-mod-http-fancyindex< 1.10.3-1+deb9u6libnginx-mod-http-fancyindex_1.10.3-1+deb9u6_amd64.deb
Debian10armellibnginx-mod-http-subs-filter-dbgsym< 1.14.2-2+deb10u4libnginx-mod-http-subs-filter-dbgsym_1.14.2-2+deb10u4_armel.deb
Debian10arm64libnginx-mod-http-cache-purge< 1.14.2-2+deb10u4libnginx-mod-http-cache-purge_1.14.2-2+deb10u4_arm64.deb
Debian9i386libnginx-mod-http-fancyindex< 1.10.3-1+deb9u6libnginx-mod-http-fancyindex_1.10.3-1+deb9u6_i386.deb
Debian10i386libnginx-mod-http-uploadprogress< 1.14.2-2+deb10u4libnginx-mod-http-uploadprogress_1.14.2-2+deb10u4_i386.deb
Debian10mipslibnginx-mod-rtmp< 1.14.2-2+deb10u4libnginx-mod-rtmp_1.14.2-2+deb10u4_mips.deb
Debian9i386nginx-light< 1.10.3-1+deb9u6nginx-light_1.10.3-1+deb9u6_i386.deb
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CVSS2

6.8

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS3

7.7

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

AI Score

6.8

Confidence

Low

EPSS

0.389

Percentile

97.3%

JSON
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