Buffer overflow in Apache HTTP Server
CVE-2017-15710
In Apache httpd 2.0.23 to 2.0.65, 2.2.0 to 2.2.34, and 2.4.0 to 2.4.29, mod_authnz_ldap, if configured with AuthLDAPCharsetConfig, uses the Accept-Language header value to lookup the right charset encoding when verifying the user's credentials. If the header value is not present in the charset conversion table, a fallback mechanism is used to truncate it to a two characters value to allow a quick retry (for example, 'en-US' is truncated to 'en'). A header value of less than two characters forces an out of bound write of one NUL byte to a memory location that is not part of the string. In the worst case, quite unlikely, the process would crash which could be used as a Denial of Service attack. In the more likely case, this memory is already reserved for future use and the issue has no effect at all.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.171 (97.1th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.171 · newest: 0.171 · change: 0.000
Affected products
- Apache HTTP Server — versions 2.4.1, 2.4.2, 2.4.3
- Apache Software Foundation HTTP Server — versions 2.0.23 to 2.0.65, 2.4.0 to 2.4.29, 2.2.0 to 2.2.34
- NetApp Clustered Data Ontap
- NetApp Santricity Cloud Connector
- NetApp Storage Automation Store
- NetApp Storagegrid
- Canonical Ubuntu Linux — versions 12.04, 14.04, 16.04
- Debian Linux — versions 7.0, 8.0, 9.0
- Red Hat Enterprise Linux — versions 6.0, 7.0, 7.4
Weakness classification (CWE)
Public proof-of-concept exploits
- ARPSyndicate/cvemon
- AlanShami/Red-Team-vs-Blue-Team-Project
- Chad-Atkinson/Red-vs-Blue-team-project
- ChadSWilliamson/Red-vs.-Blue-Project
- FRobertAllen/Red-Team-Vs-Blue-Team
- NeoOniX/5ATTACK
- PawanKumarPandit/Shodan-nrich
- RoseSecurity-Research/Red-Teaming-TTPs
- RoseSecurity/Red-Teaming-TTPs
- SamGeron/Red-Team-vs-Blue-Team
References
- usn.ubuntu.com/3627-1/ (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/103512 (VDB Entry, Third Party Advisory, vdb-entry)
- www.debian.org/security/2018/dsa-4164 (vendor-advisory, Third Party Advisory)
- security.netapp.com/advisory/ntap-20180601-0004/ (Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:3558 (vendor-advisory, Third Party Advisory)
- support.hpe.com/hpsc/doc/public/display (Third Party Advisory)
- access.redhat.com/errata/RHSA-2019:0367 (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/3627-2/ (vendor-advisory, Third Party Advisory)
- www.openwall.com/lists/oss-security/2018/03/24/8 (mailing-list, Mailing List, Third Party Advisory)
- www.securitytracker.com/id/1040569 (VDB Entry, Third Party Advisory, vdb-entry)
Frequently asked questions
- What is CVE-2017-15710?
- CVE-2017-15710 is a high-severity vulnerability in Apache HTTP Server, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2018-03-26.
- How severe is CVE-2017-15710?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2017-15710 known to be exploited?
- 32 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.