- Description
- 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.
- Source
- support@hackerone.com
- NVD status
- Modified
CVSS 3.1
- Type
- Primary
- Base score
- 9.8
- Impact score
- 5.9
- Exploitability score
- 3.9
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Severity
- CRITICAL
- Hype score
- Not currently trending
CVE-2023-38545 9.8 Critical CVE-2025-23048 9.1 Critical CVE-2025-55754 9.6 Critical HP Device Manager Vulnerability Update (5.0.16) | HP® Support https://t.co/8FGdyDPQtJ
@autumn_good_35
10 Mar 2026
495 Impressions
1 Retweet
1 Like
0 Bookmarks
0 Replies
0 Quotes
🚨 CISA flags critical curl heap overflow impacting Siemens Desigo CC & SENTRON Powermanager CISA’s ICSA-26-043-04 (Feb 12, 2026) warns that Siemens Desigo CC (V6–V8 < QU2) and SENTRON Powermanager (V6–V8 < QU2) inherit CVE-2023-38545—a network-reachable curl
@ThreatSynop
12 Feb 2026
51 Impressions
0 Retweets
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🚨 Critical #cURL vuln (CVE-2023-38545, CVSS 9.8) impacts billions of devices via SOCKS5 proxies. Risk: RCE across cloud, containers & CI/CD. ✅ Update to v8.4.0+ ✅ Check: curl --version ✅ Disable SOCKS5 if not patched Full analysis: https://t.co/qkbfPX34RC #CyberSec
@AccuKnox
20 Aug 2025
103 Impressions
0 Retweets
0 Likes
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curl の脆弱性 CVE-2024-11053 (CVSS 9.1) が FIX：ユーザー認証情報の漏えいの可能性 https://t.co/Sm37IgJmlG curl と libcurl の脆弱性が FIX しました。ご利用のチームは、ご注意ください。関連する直近の記事は、2023/10/11 の「cURL の深刻な脆弱性 CVE-2023-38545 が FIX：バージョン 8.4.0… https://t.co/S0bhpLhXhs
@iototsecnews
24 Dec 2024
68 Impressions
2 Retweets
1 Like
1 Bookmark
0 Replies
0 Quotes
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