CVE-2017-1000254
En bref
- Source
- NVD
- EPSS
- EPSS 8.14 % · centile 95 ()
- État
- PUBLISHED
- Publiée
- Mise à jour
- Attribuée par
- mitre
- Statut NVD
- Modified
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Description
libcurl may read outside of a heap allocated buffer when doing FTP. When libcurl connects to an FTP server and successfully logs in (anonymous or not), it asks the server for the current directory with the `PWD` command. The server then responds with a 257 response containing the path, inside double quotes. The returned path name is then kept by libcurl for subsequent uses. Due to a flaw in the string parser for this directory name, a directory name passed like this but without a closing double quote would lead to libcurl not adding a trailing NUL byte to the buffer holding the name. When libcurl would then later access the string, it could read beyond the allocated heap buffer and crash or wrongly access data beyond the buffer, thinking it was part of the path. A malicious server could abuse this fact and effectively prevent libcurl-based clients to work with it - the PWD command is always issued on new FTP connections and the mistake has a high chance of causing a segfault. The simple fact that this has issue remained undiscovered for this long could suggest that malformed PWD responses are rare in benign servers. We are not aware of any exploit of this flaw. This bug was introduced in commit [415d2e7cb7](https://github.com/curl/curl/commit/415d2e7cb7), March 2005. In libcurl version 7.56.0, the parser always zero terminates the string but also rejects it if not terminated properly with a final double quote.
Faiblesses (CWE)
- CWE-119 — Opération hors des limites d'un tampon mémoire
Références
- https://security.gentoo.org/glsa/201712-04
- https://access.redhat.com/errata/RHSA-2018:3558
- https://support.apple.com/HT208331
- http://www.securitytracker.com/id/1039509
- https://curl.haxx.se/673d0cd8.patch
- https://curl.haxx.se/docs/adv_20171004.html
- https://access.redhat.com/errata/RHSA-2018:2486
- http://www.debian.org/security/2017/dsa-3992
- http://www.securityfocus.com/bid/101115
- https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
- https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
Scores
| Version | Score | Vecteur | Évalué par |
|---|---|---|---|
| CVSS 3.0 | HIGH 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 2.0 | MEDIUM 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P | NVD · nvd@nist.gov (Primary) |
Références européennes
- ENISA EUVD · EUVD-2017-1515
- GCVE · GCVE-0-2017-1000254
Avis du CERT-FR
- CERTFR-2018-AVI-339 — Multiples vulnérabilités dans les produits Juniper · cert.ssi.gouv.fr
- CERTFR-2017-AVI-451 — Multiples vulnérabilités dans les produits Apple · cert.ssi.gouv.fr
Configurations affectées (CPE NVD)
cpe:2.3:a:haxx:libcurl:7.7:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.7.1:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.7.2:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.7.3:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.8:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.8.1:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.9:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.9.1:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.9.2:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.9.3:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.9.4:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.9.5:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.9.6:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.9.7:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.9.8:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.10:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.10.1:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.10.2:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.10.3:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.10.4:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.10.5:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.10.6:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.10.7:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.10.8:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.11.0:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.11.1:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.11.2:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.12.0:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.12.1:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.12.2:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.12.3:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.13.0:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.13.1:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.13.2:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.14.0:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.14.1:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.15.0:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.15.1:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.15.2:*:*:*:*:*:*:*cpe:2.3:a:haxx:libcurl:7.15.3:*:*:*:*:*:*:*- +77 autres
Produits affectés
| Produit | Versions |
|---|---|
| affected n/a |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |