VulnerabilityModified
CVE-2020-15694
For example, httpClient.get().contentLength() does not raise any error if a malicious server provides a negative Content-Length.
HIGH 7.5EPSS 2.33%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (2.33%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In Nim 1.2.4, the standard library httpClient fails to properly validate the server response. For example, httpClient.get().contentLength() does not raise any error if a malicious server provides a negative Content-Length.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- EPSS
- 2.33% probability · 83th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- nim-lang/nim
- Source
- cve@mitre.org
References
- http://www.openwall.com/lists/oss-security/2021/02/04/2Exploit, Mailing List, Third Party Advisory
- https://consensys.net/diligence/vulnerabilities/nim-httpclient-header-crlf-injection/Exploit, Third Party Advisory
- https://github.com/nim-lang/Nim/blob/dc5a40f3f39c6ea672e6dc6aca7f8118a69dda99/lib/pure/httpclient.nim#L241Patch, Third Party Advisory
- https://nim-lang.org/blog/2020/07/30/versions-126-and-108-released.htmlRelease Notes, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/02/04/2Exploit, Mailing List, Third Party Advisory
- https://consensys.net/diligence/vulnerabilities/nim-httpclient-header-crlf-injection/Exploit, Third Party Advisory
- https://github.com/nim-lang/Nim/blob/dc5a40f3f39c6ea672e6dc6aca7f8118a69dda99/lib/pure/httpclient.nim#L241Patch, Third Party Advisory
- https://nim-lang.org/blog/2020/07/30/versions-126-and-108-released.htmlRelease Notes, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.