Bug 1204384 - (CVE-2022-35260) VUL-0: CVE-2022-35260: curl: .netrc parser out-of-bounds access
VUL-0: CVE-2022-35260: curl: .netrc parser out-of-bounds access
Classification: Novell Products
Product: SUSE Security Incidents
Classification: Novell Products
Component: Incidents
Other Other
: P3 - Medium : Normal
: ---
Assigned To: Security Team bot
Security Team bot
Depends on:
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Reported: 2022-10-17 11:59 UTC by Gabriele Sonnu
Modified: 2022-10-26 09:53 UTC (History)
1 user (show)

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Found By: Security Response Team
Services Priority:
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Marketing QA Status: ---
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Comment 6 Gabriele Sonnu 2022-10-26 07:37:26 UTC
Public via oss-security:

CVE-2022-35260: .netrc parser out-of-bounds access

Project curl Security Advisory, October 26 2022 -


curl can be told to parse a `.netrc` file for credentials. If that file ends
in a line with consecutive non-white space letters and no newline, curl could
read past the end of the stack-based buffer, and if the read works, write a
zero byte possibly beyond its boundary.

This will in most cases cause a segfault or similar, but circumstances might
also cause different outcomes.

If a malicious user can provide a custom netrc file to an application or
otherwise affect its contents, this flaw could be used as denial-of-service.

We are not aware of any exploit of this flaw.


The flaw was introduced in curl with [this
commit](https://github.com/curl/curl/commit/eeaae10c0fb27aa06), first shipped
in curl 7.84.0.

The Common Vulnerabilities and Exposures (CVE) project has assigned the name
CVE-2022-35260 to this issue.

CWE-121: Stack-based Buffer Overflow

Severity: low


- Affected versions: curl 7.84.0 to and including 7.85.0
- Not affected versions: curl < 7.84.0 and >= 7.86.0

libcurl is used by many applications, but not always advertised as such!


[The fix for CVE-2022-35260](https://github.com/curl/curl/commit/c97ec984fb2bc919a3aa86)


 A - Upgrade curl to version 7.86.0

 B - Apply the patch to your local version

 C - Do not use `.netrc` files


This issue was reported to the curl project on October 3, 2022. We contacted
distros@openwall on October 18, 2022.

libcurl 7.86.0 was released on October 26 2022, coordinated with the
publication of this advisory.


- Reported-by: Hiroki Kurosawa
- Patched-by: Daniel Stenberg

Thanks a lot!
Comment 7 Pedro Monreal Gonzalez 2022-10-26 09:51:28 UTC
Factory submission:
   * https://build.opensuse.org/request/show/1031305
Comment 8 Gabriele Sonnu 2022-10-26 09:53:19 UTC
All done here, closing.