vulnwire
7.5high

CVE-2016-4979in critical feed

The Apache HTTP Server 2.4.18 through 2.4.20, when mod_http2 and mod_ssl are enabled, does not properly recognize the "SSLVerifyClient requ…

Published 10 y ago · modified 4 mo ago · JSON

CVSS
7.5
v3.0 · NVD
CISA KEV
No
not known exploited
EPSS
18.8%
percentile 97%
Public exploits
0
none known

The Apache HTTP Server 2.4.18 through 2.4.20, when mod_http2 and mod_ssl are enabled, does not properly recognize the "SSLVerifyClient require" directive for HTTP/2 request authorization, which allows remote attackers to bypass intended access restrictions by leveraging the ability to send multiple requests over a single connection and aborting a renegotiation.

Exploit prediction (EPSS)

18.80% probability of exploitation in the next 30 days, higher than 97% of all scored CVEs.

CVSS scores

Assigned byVersionScoreVector
NVD3.07.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD2.05.0AV:N/AC:L/Au:N/C:N/I:P/A:N

Classification

Weakness
Technology feeds
Apache HTTP Server (RSS, critical only)

References

  • access.redhat.com /errata/RHSA-2016:1420 · vendor-advisory, x_refsource_REDHAT, x_transferred
  • httpd.apache.org /security/vulnerabilities_24.html · x_refsource_CONFIRM, x_transferred
  • security.gentoo.org /glsa/201610-02 · vendor-advisory, x_refsource_GENTOO, x_transferred
  • seclists.org /fulldisclosure/2016/Jul/11 · mailing-list, x_refsource_FULLDISC, x_transferred
  • oracle.com /technetwork/security-advisory/cpuoct2016-2881722.html · x_refsource_CONFIRM, x_transferred
  • apache.org /dist/httpd/CHANGES_2.4 · x_refsource_CONFIRM, x_transferred
  • securityfocus.com /bid/91566 · vdb-entry, x_refsource_BID, x_transferred
  • oracle.com /technetwork/topics/security/bulletinoct2016-3090566.html · x_refsource_CONFIRM, x_transferred
  • securitytracker.com /id/1036225 · vdb-entry, x_refsource_SECTRACK, x_transferred
  • openwall.com /lists/oss-security/2016/07/05/5 · mailing-list, x_refsource_MLIST, x_transferred
  • github.com /apache/httpd/commit/2d0e4eff04ea963128a41faaef21f987272e05a2 · x_refsource_CONFIRM, x_transferred
  • packetstormsecurity.com /files/137771/Apache-2.4.20-X509-Authentication-Bypass.html · x_refsource_MISC, x_transferred
  • security.netapp.com /advisory/ntap-20180601-0001/ · x_refsource_CONFIRM, x_transferred
  • lists.apache.org /thread.html/56c2e7cc9deb1c12a843d0dc251ea7fd3e7e80293cde02fcd65286ba%40%3Ccvs.httpd.apach · mailing-list, x_refsource_MLIST, x_transferred
  • lists.apache.org /thread.html/84a3714f0878781f6ed84473d1a503d2cc382277e100450209231830%40%3Ccvs.httpd.apach · mailing-list, x_refsource_MLIST, x_transferred
  • lists.apache.org /thread.html/rd18c3c43602e66f9cdcf09f1de233804975b9572b0456cc582390b6f%40%3Ccvs.httpd.apac · mailing-list, x_refsource_MLIST, x_transferred
  • lists.apache.org /thread.html/re3d27b6250aa8548b8845d314bb8a350b3df326cacbbfdfe4d455234%40%3Ccvs.httpd.apac · mailing-list, x_refsource_MLIST, x_transferred
  • lists.apache.org /thread.html/rf6449464fd8b7437704c55f88361b66f12d5b5f90bcce66af4be4ba9%40%3Ccvs.httpd.apac · mailing-list, x_refsource_MLIST, x_transferred
  • lists.apache.org /thread.html/rc998b18880df98bafaade071346690c2bc1444adaa1a1ea464b93f0a%40%3Ccvs.httpd.apac · mailing-list, x_refsource_MLIST, x_transferred
  • lists.apache.org /thread.html/re1e3a24664d35bcd0a0e793e0b5fc6ca6c107f99a1b2c545c5d4b467%40%3Ccvs.httpd.apac · mailing-list, x_refsource_MLIST, x_transferred
  • lists.apache.org /thread.html/r04e89e873d54116a0635ef2f7061c15acc5ed27ef7500997beb65d6f%40%3Ccvs.httpd.apac · mailing-list, x_refsource_MLIST, x_transferred
  • lists.apache.org /thread.html/r9f93cf6dde308d42a9c807784e8102600d0397f5f834890708bf6920%40%3Ccvs.httpd.apac · mailing-list, x_refsource_MLIST, x_transferred
  • lists.apache.org /thread.html/rcc44594d4d6579b90deccd4536b5d31f099ef563df39b094be286b9e%40%3Ccvs.httpd.apac · mailing-list, x_refsource_MLIST, x_transferred
  • lists.apache.org /thread.html/rb14daf9cc4e28d18cdc15d6a6ca74e565672fabf7ad89541071d008b%40%3Ccvs.httpd.apac · mailing-list, x_refsource_MLIST, x_transferred
  • lists.apache.org /thread.html/r76142b8c5119df2178be7c2dba88fde552eedeec37ea993dfce68d1d%40%3Ccvs.httpd.apac · mailing-list, x_refsource_MLIST, x_transferred

Sources

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