PT-2020-14589 · Nim+1 · Nim+1

Tintinweb · Published 2020-08-14 · Updated 2024-06-15 · CVE-2020-15694

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Name of the Vulnerable Software and Affected Versions Nim version 1.2.4

Description The standard library httpClient in Nim fails to properly validate the server response. For instance, httpClient.get().contentLength() does not raise an error if a malicious server provides a negative Content-Length.

Recommendations For Nim version 1.2.4, consider validating server responses manually to ensure the Content-Length is not negative until a patch is available. As a temporary workaround, restrict the use of httpClient.get().contentLength() to minimize the risk of exploitation.

Exploit

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

ALT-PU-2020-3173

CVE-2020-15694

OPENSUSE-SU-2022:10095-1

OPENSUSE-SU-2022:10101-1

OPENSUSE-SU-2024:12253-1

Affected Products

Alt Linux

Nim

References · 35

• 🔥 http://openwall.com/lists/oss-security/2021/02/04/2 · Exploit
• 🔥 https://consensys.net/diligence/vulnerabilities/nim-httpclient-header-crlf-injection · Exploit
• https://github.com/nim-lang/Nim/blob/dc5a40f3f39c6ea672e6dc6aca7f8118a69dda99/lib/pure/httpclient.nim#L241 · Patch
• https://osv.dev/vulnerability/CVE-2020-15694 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-15694 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-15694 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-15694 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-15694 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2022:10095-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:12253-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2020-15694 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2022:10101-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-15694 · Security Note
• https://lists.opensuse.org/archives/list/[e-mail]/thread/HM5F2H5AWO4WRQSTOWMODGKMXAHHBVRH · Note
• https://suse.com/security/cve/CVE-2020-15690 · Note