Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS1meDJjLTk2dmotOTg1ds4AAwRn

HAProxyMessageDecoder Stack Exhaustion DoS

Impact

A StackOverflowError can be raised when parsing a malformed crafted message due to an infinite recursion.

Patches

Users should upgrade to 4.1.86.Final.

Workarounds

There is no workaround, except using a custom HaProxyMessageDecoder.

References

When parsing a TLV with type = PP2_TYPE_SSL, the value can be again a TLV with type = PP2_TYPE_SSL and so on. The only limitation of the recursion is that the TLV length cannot be bigger than 0xffff because it is encoded in an unsigned short type. Providing a TLV with a nesting level that is large enough will lead to raising of a StackOverflowError. The StackOverflowError will be caught if HAProxyMessageDecoder is used as part of Netty’s ChannelPipeline, but using it directly without the ChannelPipeline will lead to a thrown exception / crash.

For more information

If you have any questions or comments about this advisory:

• Open an issue in netty

Permalink: https://github.com/advisories/GHSA-fx2c-96vj-985v
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1meDJjLTk2dmotOTg1ds4AAwRn
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: 6 months ago
Updated: 4 months ago

CVSS Score: 5.3
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Identifiers: GHSA-fx2c-96vj-985v, CVE-2022-41881
References:

• https://github.com/netty/netty/security/advisories/GHSA-fx2c-96vj-985v
• https://nvd.nist.gov/vuln/detail/CVE-2022-41881
• https://lists.debian.org/debian-lts-announce/2023/01/msg00008.html
• https://www.debian.org/security/2023/dsa-5316
• https://security.netapp.com/advisory/ntap-20230113-0004/
• https://github.com/advisories/GHSA-fx2c-96vj-985v

Affected Packages