CVE-2017-20006 json
UnRAR 5.6.1.2 and 5.6.1.3 has a heap-based buffer overflow in Unpack::CopyString (called from Unpack::Unpack5 and CmdExtract::ExtractCurren…
published 2021-07-01 5 y ago modified 2026-06-17 4 mo ago also EUVD-2017-11021
- cvss
- 7.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.2%
- EPSS 1.2% chance of exploitation in 30 days, percentile 68%
- public exploits
- 0
- none known
Summary
UnRAR 5.6.1.2 and 5.6.1.3 has a heap-based buffer overflow in Unpack::CopyString (called from Unpack::Unpack5 and CmdExtract::ExtractCurrentFile).
Patch / fix
- unrar-nonfree Debian 14, Debian 13, Debian 12 1:5.6.6-1
debian advisories DEBIAN-CVE-2017-20006
- unrar SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES for SAP 12 SP3 +9 more 5.6.1-4.5.1
suse advisories SUSE-SU-2021:2834-1
Exploit prediction
1.22% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- bugs.chromium.org https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=4373 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
github.com
/aawc/unrar/commit/0ff832d31470471803b175cfff4e40c1b08ee779
patch, third-party-advisory
-
bugs.chromium.org
/p/oss-fuzz/issues/detail?id=4373
exploit, issue-tracking, patch, third-party-advisory
-
github.com
/google/oss-fuzz-vulns/blob/main/vulns/unrar/OSV-2017-104.yaml
third-party-advisory
Sources
- CVE List CVE-2017-20006
- NVD CVE-2017-20006
Fencer Vulns 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.