VulnerabilityModified
CVE-2021-40839
The rencode package through 1.0.6 for Python allows an infinite loop in typecode decoding (such as via ;\x2f\x7f), enabling a remote attack that consumes CPU and memory.
HIGH 7.5EPSS 5.57%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (5.57%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The rencode package through 1.0.6 for Python allows an infinite loop in typecode decoding (such as via ;\x2f\x7f), enabling a remote attack that consumes CPU and memory.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 5.57% probability · 92th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-835
- Affected
- rencode project/rencode · fedoraproject/fedora
- Source
- cve@mitre.org
References
- https://github.com/aresch/rencode/commit/572ff74586d9b1daab904c6f7f7009ce0143bb75Patch, Third Party Advisory
- https://github.com/aresch/rencode/pull/29Patch, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BMVQRPDVSVZNGGX57CFKCYT3DEYO4QB6/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MCLETLGVM5DBX6QNHQFW6TWGO5T3DENY/
- https://pypi.org/project/rencode/#historyThird Party Advisory
- https://seclists.org/fulldisclosure/2021/Sep/16Mailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211008-0001/Third Party Advisory
- https://github.com/aresch/rencode/commit/572ff74586d9b1daab904c6f7f7009ce0143bb75Patch, Third Party Advisory
- https://github.com/aresch/rencode/pull/29Patch, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BMVQRPDVSVZNGGX57CFKCYT3DEYO4QB6/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MCLETLGVM5DBX6QNHQFW6TWGO5T3DENY/
- https://pypi.org/project/rencode/#historyThird Party Advisory
- https://seclists.org/fulldisclosure/2021/Sep/16Mailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211008-0001/Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.