CVE-2021-3737

Published: 31 August 2021

A flaw was found in python. An improperly handled HTTP response in the HTTP client code of python may allow a remote attacker, who controls the HTTP server, to make the client script enter an infinite loop, consuming CPU time. The highest threat from this vulnerability is to system availability.

Notes

impish/devel is not affected, code supposed affected was patched already.

Priority

Medium

CVSS 3 base score: 7.5

Status

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3737
• https://bugs.python.org/issue44022
• https://github.com/python/cpython/pull/25916
• https://github.com/python/cpython/pull/26503
• https://github.com/python/cpython/commit/60ba0b68470a584103e28958d91e93a6db37ec92 (v3.10.0b2)
• https://github.com/python/cpython/commit/ea9327036680acc92d9f89eaf6f6a54d2f8d78d9 (v3.9.6)
• https://github.com/python/cpython/commit/f396864ddfe914531b5856d7bf852808ebfc01ae (v3.8.11)
• https://github.com/python/cpython/commit/078b146f062d212919d0ba25e34e658a8234aa63 (v3.7.11)
• https://github.com/python/cpython/commit/f68d2d69f1da56c2aea1293ecf93ab69a6010ad7 (v3.6.14)
• https://github.com/python/cpython/commit/98e5a7975d99b58d511f171816ecdfb13d5cca18 (v3.10.0b3)
• https://github.com/python/cpython/commit/5df4abd6b033a5f1e48945c6988b45e35e76f647 (v3.9.6)
• https://github.com/python/cpython/commit/0389426fa4af4dfc8b1d7f3f291932d928392d8b (3.8 branch)
• https://github.com/python/cpython/commit/fee96422e6f0056561cf74fef2012cc066c9db86 (v3.7.11)
• https://github.com/python/cpython/commit/1b6f4e5e13ebd1f957b47f7415b53d0869bdbac6 (v3.6.14
• https://ubuntu.com/security/notices/USN-5083-1
• https://ubuntu.com/security/notices/USN-5199-1
• https://ubuntu.com/security/notices/USN-5200-1
• https://ubuntu.com/security/notices/USN-5201-1
• NVD
• Launchpad
• Debian