Security Patch for Two New Flaws in Curl Library Arriving on October 11
Vulnerabilities mentionedAll →
| CVE | Vulnerability | CVSS | EPSS | Flags | Affected | Exposure | Published |
|---|---|---|---|---|---|---|---|
| CVE-2023-38545 +1 in the same advisory: …38546 | This flaw makes curl overflow a heap based buffer in the SOCKS5 proxy handshake. This flaw makes curl overflow a heap based buffer in the SOCKS5 proxy handshake. When curl is asked to pass along the host name to the SOCKS5 proxy to allow that to resolve the address instead of it getting done by curl itself, the maximum length that host name can be is 255 bytes. If the host name is detected to be longer, curl switches to local name resolving and instead passes on the resolved address only. Due to this bug, the local variable that means "let the host resolve the name" could get the wrong value during a slow SOCKS5 handshake, and contrary to the intention, copy the too long host name to the target buffer instead of copying just the resolved address there. The target buffer being a heap based buffer, and the host name coming from the URL that curl has been told to operate with. NVD description · AI analysis pending | 9.8 group max | 78% |
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Full article288 words · extracted from thehackernews.com · click to collapse
Ravie LakshmananOct 09, 2023Software Security / Vulnerability
The maintainers of the Curl library have released an advisory warning of two security vulnerabilities that are expected to be addressed as part of an forthcoming update set for release on October 11, 2023.
This includes a high-severity and a low-severity flaw tracked under the identifiers CVE-2023-38545 and CVE-2023-38546, respectively.
Additional details about the issues and the exact version ranges impacted have been withheld owing to the possibility that the information could be used to "help identify the problem (area) with a very high accuracy."
That said, the "last several years" of versions of the library are said to be affected.
"Sure, there is a minuscule risk that someone can find this (again) before we ship the patch, but this issue has stayed undetected for years for a reason," Daniel Stenberg, the lead developer behind the project, said in a message posted on GitHub.
Curl, powered by libcurl, is a popular command-line tool for transferring data specified with URL syntax. It supports a wide range of protocols such as FTP(S), HTTP(S), IMAP(S), LDAP(S), MQTT, POP3, RTMP(S), SCP, SFTP, SMB(S), SMTP(S), TELNET, WS, and WSS.
While 2023-38545 impacts both libcurl and curl, CVE-2023-38546 affects only libcurl.
"With specific version range details undisclosed to prevent pre-release problem identification, the vulnerabilities will be fixed in curl version 8.4.0," Saeed Abbasi, product manager at Qualys Threat Research Unit (TRU), said.
"Organizations should urgently inventory and scan all systems utilizing curl and libcurl, anticipating identifying potentially vulnerable versions once details are disclosed with the release of Curl 8.4.0 on October 11."
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