CVE-2017-12942 json
libunrar.a in UnRAR before 5.5.7 has a buffer overflow in the Unpack::LongLZ function.
published 2017-08-18 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-4466
- cvss
- 9.8
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.3%
- EPSS 2.3% chance of exploitation in 30 days, percentile 83%
- public exploits
- 0
- none known
Summary
libunrar.a in UnRAR before 5.5.7 has a buffer overflow in the Unpack::LongLZ function.
Patch / fix
- unrar-nonfree Debian 14, Debian 13, Debian 12 1:5.5.8-1
debian advisories DEBIAN-CVE-2017-12942
- unrar SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +9 more 5.6.1-4.5.1
- unrar SLES for SAP 11 SP4, SLES 11 SP4 5.6.1-5.3.1
suse advisories SUSE-SU-2021:2834-1SUSE-SU-2018:0862-1
Exploit prediction
2.30% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- seclists.org http://seclists.org/oss-sec/2017/q3/290 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 9.8 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
References
-
seclists.org
/oss-sec/2017/q3/290
exploit, mailing-list, third-party-advisory
-
security.gentoo.org
/glsa/201709-24
vendor-advisory
- kc.mcafee.com /corporate/index?page=content&id=SB10241
Sources
- CVE List CVE-2017-12942
- NVD CVE-2017-12942
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.