Out-of-bounds Read in Apache HTTP Server
CVE-2017-7668
The HTTP strict parsing changes added in Apache httpd 2.2.32 and 2.4.24 introduced a bug in token list parsing, which allows ap_find_token() to search past the end of its input string. By maliciously crafting a sequence of request headers, an attacker may be able to cause a segmentation fault, or to force ap_find_token() to return an incorrect value.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.575 (99.1th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.575 · newest: 0.575 · change: 0.000
Affected products
- Apache HTTP Server — versions 2.2.32, 2.4.24, 2.4.25
- Apache Software Foundation HTTP Server — versions 2.4.24, 2.4.25, 2.2.32
- Apple Mac OS X — versions 10.11.6, 10.12.6
- NetApp Clustered Data Ontap
- NetApp Oncommand Unified Manager
- NetApp Storagegrid
- Oracle Secure Global Desktop — versions 5.3
- Debian Linux — versions 8.0, 9.0
- Red Hat Enterprise Linux Desktop — versions 7.0
- Red Hat Enterprise Linux Eus — versions 7.2, 7.3, 7.4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- support.apple.com/HT208221 (Third Party Advisory)
- access.redhat.com/errata/RHSA-2017:2479 (vendor-advisory, Third Party Advisory)
- lists.apache.org/thread.html/55a068b6a5eec0b3198ae7d96a7cb412352d0ffa7716612c5a… (mailing-list)
- access.redhat.com/errata/RHSA-2017:2483 (vendor-advisory, Third Party Advisory)
- security.netapp.com/advisory/ntap-20180601-0002/ (Third Party Advisory)
- support.hpe.com/hpsc/doc/public/display (Third Party Advisory)
- support.hpe.com/hpsc/doc/public/display (Third Party Advisory)
- www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html (Patch, Third Party Advisory)
- www.securityfocus.com/bid/99137 (VDB Entry, Third Party Advisory, vdb-entry)
- www.debian.org/security/2017/dsa-3896 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-7668?
- CVE-2017-7668 is a high-severity vulnerability in Apache HTTP Server, classified under Buffer Over-read. CVSS score: 7.5/10. Published 2017-06-20.
- How severe is CVE-2017-7668?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2017-7668 known to be exploited?
- 30 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.