CVE-2017-20006
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).
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.22%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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).
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS
- 1.22% probability · 69th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- rarlab/unrar
- Source
- cve@mitre.org
EPSS 1.2% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=4373Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/aawc/unrar/commit/0ff832d31470471803b175cfff4e40c1b08ee779Patch, Third Party Advisory
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/unrar/OSV-2017-104.yamlThird Party Advisory
- https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=4373Exploit, Issue Tracking, Patch, Third Party Advisory
- https://github.com/aawc/unrar/commit/0ff832d31470471803b175cfff4e40c1b08ee779Patch, Third Party Advisory
- https://github.com/google/oss-fuzz-vulns/blob/main/vulns/unrar/OSV-2017-104.yamlThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.